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标题: Spring 的依赖注入 [打印本页]

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作者: 吴旭华    时间: 2023-7-20 21:23
标题: Spring 的依赖注入
Spring 的依赖注入

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目录

• Spring 的依赖注入
  
  
  
  • 每博一文案
    
  • 1. 依赖注入
    
    
    
    • 1.1 构造注入
      
      
      
      • 1.1.1 通过参数名进行构造注入
        
      • 1.1.2 通过参数的下标，进行构造注入
        
      • 1.1.3 不指定参数下标，不指定参数名字，通过自动装配的方式
        
      
      
    • 1.2 set 注入
      
    
    
  • 2. set注入的各种方式详解
    
    
    
    • 2.1 set 注入外部Bean
      
    • 2.2 set 注入内部Bean
      
    • 2.3 set 注入类型
      
      
      
      • 2.3.1 set 注入简单类型
        
      • 2.3.2 set 复杂类型注入的方式
        
      
      
    • 2.4 级联属性赋值
      
    • 2.5 set 注入数组类型
      
      
      
      • 2.5.1 当数组中的元素是简单类型
        
      • 2.5.2 当数组中的元素是复杂类型
        
      
      
    • 2.6 set注入List集合类型
      
      
      
      • 2.6.1 set 注入 List集合简单类型
        
      • 2.6.2 set 注入List集合复杂类型
        
      
      
    • 2.7 set注入Set集合类型
      
      
      
      • 2.7.1 set 注入 Set集合简单类型
        
      • 2.7.2 set 注入Set集合复杂类型
        
      
      
    • 2.8 set注入Map集合
      
      
      
      • 2.8.1 set 注入的Map集合简单类型
        
      • 2.8.2 set 注入的Map集合的复杂类型
        
      
      
    • 2.9 set注入Properties 特殊的 Map 集合
      
    • 2.10 set 注入 null 和空字符串的方式
      
      
      
      • 2.10.1  set 注入 null 值的方式
        
      • 2.10.2  set 注入空字符串值的方式
        
      
      
    • 2.11 set 注入的属性值当中含有特殊符号，怎么处理
      
    
    
  • 3. 命名空间注入
    
    
    
    • 3.1  p命名空间注入
      
    • 3.2  c命名空间注入
      
    • 3.3 util命名空间注入
      
    
    
  • 4. 补充：Spring引入外部属性配置文件
    
  • 5. 总结：
    
  • 6. 最后:
    
  
  

每博一文案

1. "在千千万万个选择里"，我永远选择去做哪些我认为值得的事，我可能干得很漂亮，也可能搞得一塌糊涂。
2. 但没关系，重要的是我为之努力过。”我们很难做好每件事，让人生不留下任何遗憾，尽力而为就好“享受
3. 生活的过程，接受结果。”人生是用来体验的，不是用来演绎完美的，我慢慢能接受自己身上哪些灰暗的部分，原谅自己
4. 的迟钝和平庸，允许自己出错，允许自己偶尔断电，带着缺憾拼命绽放，这是与自己达成和解的唯一方式。”
5. 尽力就好，允许所有的事与愿违。和不适合你的过去说再见，哪些伤痛的不堪的，霉烂的过去绝口不提。
6. 太阳的起落在告诉我们，永远会有崭新的一天。
7. “真正有价值的事情，都不是轻松舒服就能完成的”。那些晨间的寂静，不眠的星光，清醒的克制，
8. 孤军奋战的坚持，暗暗许下的承诺，才是我热爱自己的时刻。"人生就是一步一步地打怪升级，坚持
9. 下去，你所执着的努力一定会有所收获"，
10.     <bean id="" >
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans><constructor-arg name="" value=""></constructor-arg>
23. <?xml version="1.0" encoding="UTF-8"?>
24. <beans xmlns="http://www.springframework.org/schema/beans"
25.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
28.     <bean id="peopleBean" >
30.     </bean>
32. </beans><constructor-arg name="" ref=""></constructor-arg>
33.     </bean><?xml version="1.0" encoding="UTF-8"?>
34. <beans xmlns="http://www.springframework.org/schema/beans"
35.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
38.     <bean id="peopleBean" >
40.     </bean>
42. </beans>       ——————《网友的评论》

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1. 依赖注入

依赖注入实现了控制反转的思想：

• Spring通过依赖注入的方式来完成Bean(类/对象)的管理。
  
• Bean的管理：Bean对象的创建，以及Bean对象中属性的赋值（或者叫做Bean对象之间的关联的维护）。
  

依赖注入：

• 依赖指的是对象和对象 之间的关联关系。
  
• 注入指的是一种数据传递行为，通过注入行为来让对象和对象产生关系。
  

依赖注入常见的实现方式包括两种：

• 第一种：set注入
  
• 第二种: 构造注入
  

**准备工作：通过 maven 导入对应 spring6 的相关jar **

1. <?xml version="1.0" encoding="UTF-8"?>
2. <project xmlns="http://maven.apache.org/POM/4.0.0"
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13. <?xml version="1.0" encoding="UTF-8"?>
14. <beans xmlns="http://www.springframework.org/schema/beans"
15.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
18.     <bean id="peopleBean" >
20.     </bean>
22. </beans> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
23.     <modelVersion>4.0.0</modelVersion>
25.     <groupId>org.example</groupId>
26.     <artifactId>spring6-003-dependency-injection-blog</artifactId>
27.     <version>1.0-SNAPSHOT</version>
28.    
29.     <packaging>jar</packaging>
31.     <properties>
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans><maven.compiler.source>17</maven.compiler.source>
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><maven.compiler.target>17</maven.compiler.target>
52.     </properties>
54.    
55.     <dependencies>
56. <?xml version="1.0" encoding="UTF-8"?>
57. <beans xmlns="http://www.springframework.org/schema/beans"
58.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
59.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
61.     <bean id="peopleBean" >
63.     </bean>
65. </beans>
66. <?xml version="1.0" encoding="UTF-8"?>
67. <beans xmlns="http://www.springframework.org/schema/beans"
68.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
69.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
71.     <bean id="peopleBean" >
73.     </bean>
75. </beans>
76. <?xml version="1.0" encoding="UTF-8"?>
77. <beans xmlns="http://www.springframework.org/schema/beans"
78.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
79.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
81.     <bean id="peopleBean" >
83.     </bean>
85. </beans>
86. <?xml version="1.0" encoding="UTF-8"?>
87. <beans xmlns="http://www.springframework.org/schema/beans"
88.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
89.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
91.     <bean id="peopleBean" >
93.     </bean>
95. </beans><dependency>
96. <?xml version="1.0" encoding="UTF-8"?>
97. <beans xmlns="http://www.springframework.org/schema/beans"
98.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
99.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
101.     <bean id="peopleBean" >
103.     </bean>
105. </beans>    <groupId>org.springframework</groupId>
106. <?xml version="1.0" encoding="UTF-8"?>
107. <beans xmlns="http://www.springframework.org/schema/beans"
108.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
109.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
111.     <bean id="peopleBean" >
113.     </bean>
115. </beans>    <artifactId>spring-context</artifactId>
116. <?xml version="1.0" encoding="UTF-8"?>
117. <beans xmlns="http://www.springframework.org/schema/beans"
118.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
119.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
121.     <bean id="peopleBean" >
123.     </bean>
125. </beans>    <version>6.0.3</version>
126. <?xml version="1.0" encoding="UTF-8"?>
127. <beans xmlns="http://www.springframework.org/schema/beans"
128.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
129.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
131.     <bean id="peopleBean" >
133.     </bean>
135. </beans></dependency>
136. <?xml version="1.0" encoding="UTF-8"?>
137. <beans xmlns="http://www.springframework.org/schema/beans"
138.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
139.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
141.     <bean id="peopleBean" >
143.     </bean>
145. </beans>
146. <?xml version="1.0" encoding="UTF-8"?>
147. <beans xmlns="http://www.springframework.org/schema/beans"
148.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
149.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
151.     <bean id="peopleBean" >
153.     </bean>
155. </beans><dependency>
156. <?xml version="1.0" encoding="UTF-8"?>
157. <beans xmlns="http://www.springframework.org/schema/beans"
158.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
159.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
161.     <bean id="peopleBean" >
163.     </bean>
165. </beans>    <groupId>junit</groupId>
166. <?xml version="1.0" encoding="UTF-8"?>
167. <beans xmlns="http://www.springframework.org/schema/beans"
168.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
169.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
171.     <bean id="peopleBean" >
173.     </bean>
175. </beans>    <artifactId>junit</artifactId>
176. <?xml version="1.0" encoding="UTF-8"?>
177. <beans xmlns="http://www.springframework.org/schema/beans"
178.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
179.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
181.     <bean id="peopleBean" >
183.     </bean>
185. </beans>    <version>4.13.2</version>
186. <?xml version="1.0" encoding="UTF-8"?>
187. <beans xmlns="http://www.springframework.org/schema/beans"
188.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
189.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
191.     <bean id="peopleBean" >
193.     </bean>
195. </beans>    <scope>test</scope>
196. <?xml version="1.0" encoding="UTF-8"?>
197. <beans xmlns="http://www.springframework.org/schema/beans"
198.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
199.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
201.     <bean id="peopleBean" >
203.     </bean>
205. </beans></dependency>
206. <?xml version="1.0" encoding="UTF-8"?>
207. <beans xmlns="http://www.springframework.org/schema/beans"
208.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
209.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
211.     <bean id="peopleBean" >
213.     </bean>
215. </beans><dependency>
216. <?xml version="1.0" encoding="UTF-8"?>
217. <beans xmlns="http://www.springframework.org/schema/beans"
218.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
219.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
221.     <bean id="peopleBean" >
223.     </bean>
225. </beans>    <groupId>org.apache.logging.log4j</groupId>
226. <?xml version="1.0" encoding="UTF-8"?>
227. <beans xmlns="http://www.springframework.org/schema/beans"
228.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
229.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
231.     <bean id="peopleBean" >
233.     </bean>
235. </beans>    <artifactId>log4j-core</artifactId>
236. <?xml version="1.0" encoding="UTF-8"?>
237. <beans xmlns="http://www.springframework.org/schema/beans"
238.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
239.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
241.     <bean id="peopleBean" >
243.     </bean>
245. </beans>    <version>2.19.0</version>
246. <?xml version="1.0" encoding="UTF-8"?>
247. <beans xmlns="http://www.springframework.org/schema/beans"
248.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
249.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
251.     <bean id="peopleBean" >
253.     </bean>
255. </beans></dependency>
256. <?xml version="1.0" encoding="UTF-8"?>
257. <beans xmlns="http://www.springframework.org/schema/beans"
258.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
259.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
261.     <bean id="peopleBean" >
263.     </bean>
265. </beans><dependency>
266. <?xml version="1.0" encoding="UTF-8"?>
267. <beans xmlns="http://www.springframework.org/schema/beans"
268.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
269.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
271.     <bean id="peopleBean" >
273.     </bean>
275. </beans>    <groupId>org.apache.logging.log4j</groupId>
276. <?xml version="1.0" encoding="UTF-8"?>
277. <beans xmlns="http://www.springframework.org/schema/beans"
278.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
279.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
281.     <bean id="peopleBean" >
283.     </bean>
285. </beans>    <artifactId>log4j-slf4j2-impl</artifactId>
286. <?xml version="1.0" encoding="UTF-8"?>
287. <beans xmlns="http://www.springframework.org/schema/beans"
288.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
289.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
291.     <bean id="peopleBean" >
293.     </bean>
295. </beans>    <version>2.19.0</version>
296. <?xml version="1.0" encoding="UTF-8"?>
297. <beans xmlns="http://www.springframework.org/schema/beans"
298.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
299.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
301.     <bean id="peopleBean" >
303.     </bean>
305. </beans></dependency>
306.     </dependencies>
308. </project>

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1.1 构造注入

所谓的构造注入：核心就是：调用了对应的构造方法，进行一个类/对象的属性赋值。
既然要调用构造方法，进行一个属性的赋值的话，那么我们的对应属性的赋值的，构造方法必须存在才行。
构造注入：是在对象创建的时刻进行注入的。
重点：构造注入的使用的标签是：

1. [/code][size=3]1.1.1 通过参数名进行构造注入[/size]
3. [b]格式：[/b]
4. [code]    <bean id="" >
6. <?xml version="1.0" encoding="UTF-8"?>
7. <beans xmlns="http://www.springframework.org/schema/beans"
8.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
9.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
11.     <bean id="peopleBean" >
13.     </bean>
15. </beans><constructor-arg name="" value=""></constructor-arg>
17. <?xml version="1.0" encoding="UTF-8"?>
18. <beans xmlns="http://www.springframework.org/schema/beans"
19.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
20.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
22.     <bean id="peopleBean" >
24.     </bean>
26. </beans><constructor-arg name="" ref=""></constructor-arg>
27.     </bean>

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1. package com.rainbowsea.bean;
3. public class Cat {
5.     private String name;
7.     @Override
8.     public String toString() {
9. <?xml version="1.0" encoding="UTF-8"?>
10. <beans xmlns="http://www.springframework.org/schema/beans"
11.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
12.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
14.     <bean id="peopleBean" >
16.     </bean>
18. </beans>return "Cat{" +
19. <?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"name='" + name + '\'' +
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="testDateBean" >
43. <?xml version="1.0" encoding="UTF-8"?>
44. <beans xmlns="http://www.springframework.org/schema/beans"
45.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
48.     <bean id="peopleBean" >
50.     </bean>
52. </beans><property name="date" value="2023 -05-6"></property>
53.     </bean>
54. </beans>'}';
55.     }
56. }

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1. package com.rainbowsea.bean;
3. public class Zoon {
5.     private String zoonName;
6.     private Cat cat;
8.     public Zoon(String zoonName, Cat cat) {
9. <?xml version="1.0" encoding="UTF-8"?>
10. <beans xmlns="http://www.springframework.org/schema/beans"
11.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
12.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
14.     <bean id="peopleBean" >
16.     </bean>
18. </beans>this.zoonName = zoonName;
19. <?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="peopleBean" >
26.     </bean>
28. </beans>this.cat = cat;
29. <?xml version="1.0" encoding="UTF-8"?>
30. <beans xmlns="http://www.springframework.org/schema/beans"
31.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
32.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
34.     <bean id="peopleBean" >
36.     </bean>
38. </beans>System.out.println("执行了该 Zoon的构造器");
39.     }
41.     @Override
42.     public String toString() {
43. <?xml version="1.0" encoding="UTF-8"?>
44. <beans xmlns="http://www.springframework.org/schema/beans"
45.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
48.     <bean id="peopleBean" >
50.     </bean>
52. </beans>return "Zoon{" +
53. <?xml version="1.0" encoding="UTF-8"?>
54. <beans xmlns="http://www.springframework.org/schema/beans"
55.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
56.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
58.     <bean id="testDateBean" >
59. <?xml version="1.0" encoding="UTF-8"?>
60. <beans xmlns="http://www.springframework.org/schema/beans"
61.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
62.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
64.     <bean id="peopleBean" >
66.     </bean>
68. </beans><property name="date" value="2023 -05-6"></property>
69.     </bean>
70. </beans>"zoonName='" + zoonName + '\'' +
71. <?xml version="1.0" encoding="UTF-8"?>
72. <beans xmlns="http://www.springframework.org/schema/beans"
73.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
74.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
76.     <bean id="testDateBean" >
77. <?xml version="1.0" encoding="UTF-8"?>
78. <beans xmlns="http://www.springframework.org/schema/beans"
79.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
80.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
82.     <bean id="peopleBean" >
84.     </bean>
86. </beans><property name="date" value="2023 -05-6"></property>
87.     </bean>
88. </beans>", cat=" + cat +
89. <?xml version="1.0" encoding="UTF-8"?>
90. <beans xmlns="http://www.springframework.org/schema/beans"
91.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
92.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
94.     <bean id="testDateBean" >
95. <?xml version="1.0" encoding="UTF-8"?>
96. <beans xmlns="http://www.springframework.org/schema/beans"
97.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
98.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
100.     <bean id="peopleBean" >
102.     </bean>
104. </beans><property name="date" value="2023 -05-6"></property>
105.     </bean>
106. </beans>'}';
107.     }
108. }

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spring.xml

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>   

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运行测试：

1. package com.rainbowsea.test;
3. import com.rainbowsea.bean.Zoon;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-structure.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>Zoon zoonBean = applicationContext.getBean("zoonBean", Zoon.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(zoonBean);
72.     }
73. }

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测试如果，我们将构造方法删除了，就不行了，报如下错误：


1.1.2 通过参数的下标，进行构造注入

格式:

1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
7. <?xml version="1.0" encoding="UTF-8"?>
8. <beans xmlns="http://www.springframework.org/schema/beans"
9.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
10.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
12.     <bean id="peopleBean" >
14.     </bean>
16. </beans><constructor-arg index="0" value=""></constructor-arg>
18. <?xml version="1.0" encoding="UTF-8"?>
19. <beans xmlns="http://www.springframework.org/schema/beans"
20.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
21.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
23.     <bean id="peopleBean" >
25.     </bean>
27. </beans><constructor-arg index="1" ref=""></constructor-arg>
28.     </bean>
29. </beans>

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1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>   

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运行测试：

1.1.3 不指定参数下标，不指定参数名字，通过自动装配的方式

格式：但是这种方式不建议：因为可读性十分的差。

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>   

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1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>   

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运行测试：
1.2 set 注入

set 注入顾名思义：是基于 set () 方法实现的，底层通过反射机制调用属性对应的 set() 方法然后给属性赋值。这种方式 要求属性必须对外提供 set（） 方法。

1. package com.rainbowsea.bean;
3. public class Cat {
5.     private String name;
7.     public String getName() {
8. <?xml version="1.0" encoding="UTF-8"?>
9. <beans xmlns="http://www.springframework.org/schema/beans"
10.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
11.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
13.     <bean id="peopleBean" >
15.     </bean>
17. </beans>return name;
18.     }
20.     @Override
21.     public String toString() {
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>return "Cat{" +
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="testDateBean" >
38. <?xml version="1.0" encoding="UTF-8"?>
39. <beans xmlns="http://www.springframework.org/schema/beans"
40.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
41.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
43.     <bean id="peopleBean" >
45.     </bean>
47. </beans><property name="date" value="2023 -05-6"></property>
48.     </bean>
49. </beans>"name='" + name + '\'' +
50. <?xml version="1.0" encoding="UTF-8"?>
51. <beans xmlns="http://www.springframework.org/schema/beans"
52.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
53.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
55.     <bean id="testDateBean" >
56. <?xml version="1.0" encoding="UTF-8"?>
57. <beans xmlns="http://www.springframework.org/schema/beans"
58.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
59.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
61.     <bean id="peopleBean" >
63.     </bean>
65. </beans><property name="date" value="2023 -05-6"></property>
66.     </bean>
67. </beans>'}';
68.     }
69. }

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1. package com.rainbowsea.bean;
3. public class Zoon {
5.     private String zoonName;
6.     private Cat cat;
9.     // set 注入，必须要提供 set() 方法
10.     public void setZoonName(String zoonName) {
11. <?xml version="1.0" encoding="UTF-8"?>
12. <beans xmlns="http://www.springframework.org/schema/beans"
13.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
14.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
16.     <bean id="peopleBean" >
18.     </bean>
20. </beans>this.zoonName = zoonName;
21.     }
23.     public void setCat(Cat cat) {
24. <?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="peopleBean" >
31.     </bean>
33. </beans>this.cat = cat;
34.     }
36.     @Override
37.     public String toString() {
38. <?xml version="1.0" encoding="UTF-8"?>
39. <beans xmlns="http://www.springframework.org/schema/beans"
40.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
41.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
43.     <bean id="peopleBean" >
45.     </bean>
47. </beans>return "Zoon{" +
48. <?xml version="1.0" encoding="UTF-8"?>
49. <beans xmlns="http://www.springframework.org/schema/beans"
50.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
51.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
53.     <bean id="testDateBean" >
54. <?xml version="1.0" encoding="UTF-8"?>
55. <beans xmlns="http://www.springframework.org/schema/beans"
56.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
57.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
59.     <bean id="peopleBean" >
61.     </bean>
63. </beans><property name="date" value="2023 -05-6"></property>
64.     </bean>
65. </beans>"zoonName='" + zoonName + '\'' +
66. <?xml version="1.0" encoding="UTF-8"?>
67. <beans xmlns="http://www.springframework.org/schema/beans"
68.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
69.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
71.     <bean id="testDateBean" >
72. <?xml version="1.0" encoding="UTF-8"?>
73. <beans xmlns="http://www.springframework.org/schema/beans"
74.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
75.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
77.     <bean id="peopleBean" >
79.     </bean>
81. </beans><property name="date" value="2023 -05-6"></property>
82.     </bean>
83. </beans>", cat=" + cat +
84. <?xml version="1.0" encoding="UTF-8"?>
85. <beans xmlns="http://www.springframework.org/schema/beans"
86.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
87.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
89.     <bean id="testDateBean" >
90. <?xml version="1.0" encoding="UTF-8"?>
91. <beans xmlns="http://www.springframework.org/schema/beans"
92.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
93.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
95.     <bean id="peopleBean" >
97.     </bean>
99. </beans><property name="date" value="2023 -05-6"></property>
100.     </bean>
101. </beans>'}';
102.     }
103. }

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set注入的格式如下：

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30. <?xml version="1.0" encoding="UTF-8"?>
31. <beans xmlns="http://www.springframework.org/schema/beans"
32.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
33.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
35.     <bean id="peopleBean" >
37.     </bean>
39. </beans><constructor-arg index="0" value=""></constructor-arg>
41. <?xml version="1.0" encoding="UTF-8"?>
42. <beans xmlns="http://www.springframework.org/schema/beans"
43.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
44.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
46.     <bean id="peopleBean" >
48.     </bean>
50. </beans><constructor-arg index="1" ref=""></constructor-arg>
51.     </bean>
52. </beans>

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需要注意的是：

• 其中的  中的 name 必须是 对应类当中的 set() 方法。去了，set，其次是 首字母小写 。这是不可以乱写的。
  
• Eg：
  

1. 说明property标签的name是：setUserDao()方法名演变得到的。演变的规律是：
2. ● setUsername() 演变为 username
3. ● setPassword() 演变为 password
4. ● setUserDao() 演变为 userDao
5. ● setUserService() 演变为 userService

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• 具体的如下图所示：
  
  

运行测试：

1. package com.rainbowsea.test;
3. import com.rainbowsea.bean.Zoon;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-set.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>Zoon zoonBean = applicationContext.getBean("zoonBean", Zoon.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(zoonBean);
73.     }
74. }

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测试：我们如果把： 对应的 set 方法注释掉了,运行测试一下。

从结果上，我们可以看出：set 方法是必须 存在的。
set 注入的简单总结：

• 实现原理：
  

通过property标签获取到属性名：userDao：
通过性名推断出set方法名：setUserDao
通过反射机制调用setUserDao()方法给属性赋值
property标签的 name是属性名。
property标签的ref是要注入的bean对象的id。(通过ref属性来完成bean的装配，这是bean最简单的一种装配方式。装配指的是：创建系统组件之间关联的动作)
set注入的核心实现原理：通过反射机制调用set方法来给属性赋值，让两个对象之间产生关系。
2. set注入的各种方式详解

实际上在实际的开发过程中，我们使用的更多的是 set()方法的注入 。
2.1 set 注入外部Bean

外部Bean的特点： bean定义到外面，在property标签中使用ref 属性或是 value 属性进行注入。通常这种方式是常用。
格式如下：

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>   

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上面：我们测试用的 set 注入的方式：用的都是这种外部 Bean 的方式。
2.2 set 注入内部Bean

内部Bean的方式：在bean标签中嵌套bean标签:
具体格式如下：

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>    <bean id="" >
26. <?xml version="1.0" encoding="UTF-8"?>
27. <beans xmlns="http://www.springframework.org/schema/beans"
28.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
29.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
31.     <bean id="peopleBean" >
33.     </bean>
35. </beans><constructor-arg name="" value=""></constructor-arg>
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans><constructor-arg name="" ref=""></constructor-arg>
47.     </bean>

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运行测试：

2.3 set 注入类型

2.3.1 set 注入简单类型

1. package com.rainbowsea.bean;
3. public class Cat {
5.     private int age;
6.     private String name;
8.     // set注入：底层反射调用 set 方法
9.     public void setAge(int age) {
10. <?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>this.age = age;
20.     }
22.     public void setName(String name) {
23. <?xml version="1.0" encoding="UTF-8"?>
24. <beans xmlns="http://www.springframework.org/schema/beans"
25.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
28.     <bean id="peopleBean" >
30.     </bean>
32. </beans>this.name = name;
33.     }
36.     @Override
37.     public String toString() {
38. <?xml version="1.0" encoding="UTF-8"?>
39. <beans xmlns="http://www.springframework.org/schema/beans"
40.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
41.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
43.     <bean id="peopleBean" >
45.     </bean>
47. </beans>return "Cat{" +
48. <?xml version="1.0" encoding="UTF-8"?>
49. <beans xmlns="http://www.springframework.org/schema/beans"
50.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
51.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
53.     <bean id="testDateBean" >
54. <?xml version="1.0" encoding="UTF-8"?>
55. <beans xmlns="http://www.springframework.org/schema/beans"
56.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
57.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
59.     <bean id="peopleBean" >
61.     </bean>
63. </beans><property name="date" value="2023 -05-6"></property>
64.     </bean>
65. </beans>"age=" + age +
66. <?xml version="1.0" encoding="UTF-8"?>
67. <beans xmlns="http://www.springframework.org/schema/beans"
68.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
69.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
71.     <bean id="testDateBean" >
72. <?xml version="1.0" encoding="UTF-8"?>
73. <beans xmlns="http://www.springframework.org/schema/beans"
74.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
75.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
77.     <bean id="peopleBean" >
79.     </bean>
81. </beans><property name="date" value="2023 -05-6"></property>
82.     </bean>
83. </beans>", name='" + name + '\'' +
84. <?xml version="1.0" encoding="UTF-8"?>
85. <beans xmlns="http://www.springframework.org/schema/beans"
86.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
87.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
89.     <bean id="testDateBean" >
90. <?xml version="1.0" encoding="UTF-8"?>
91. <beans xmlns="http://www.springframework.org/schema/beans"
92.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
93.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
95.     <bean id="peopleBean" >
97.     </bean>
99. </beans><property name="date" value="2023 -05-6"></property>
100.     </bean>
101. </beans>'}';
102.     }
103. }

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格式：
在set 注入当中：简单类型的注使用 value 标签属性，进行一个属性的赋值操作
需要特别注意：如果给简单类型赋值，使用value属性或value标签。而不是ref。

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>

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运行测试：

1. package com.rainbowsea.test;
3. import com.rainbowsea.bean.Cat;
4. import com.rainbowsea.bean.Zoon;
5. import org.junit.Test;
6. import org.springframework.context.ApplicationContext;
7. import org.springframework.context.support.ClassPathXmlApplicationContext;
9. public class SpringStructure {
11.     @Test
12.     public void test() {
13. <?xml version="1.0" encoding="UTF-8"?>
14. <beans xmlns="http://www.springframework.org/schema/beans"
15.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
18.     <bean id="peopleBean" >
20.     </bean>
22. </beans>// 获取到对应的 spring6当中的xml的，容器对象
23. <?xml version="1.0" encoding="UTF-8"?>
24. <beans xmlns="http://www.springframework.org/schema/beans"
25.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
28.     <bean id="peopleBean" >
30.     </bean>
32. </beans>// 面向接口编程，左边为接口，
33. <?xml version="1.0" encoding="UTF-8"?>
34. <beans xmlns="http://www.springframework.org/schema/beans"
35.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
38.     <bean id="peopleBean" >
40.     </bean>
42. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
43. <?xml version="1.0" encoding="UTF-8"?>
44. <beans xmlns="http://www.springframework.org/schema/beans"
45.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
48.     <bean id="peopleBean" >
50.     </bean>
52. </beans>// 通过 id 获取到对应的类/class
53. <?xml version="1.0" encoding="UTF-8"?>
54. <beans xmlns="http://www.springframework.org/schema/beans"
55.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
56.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
58.     <bean id="peopleBean" >
60.     </bean>
62. </beans>Cat catBean = applicationContext.getBean("catBean", Cat.class);
63. <?xml version="1.0" encoding="UTF-8"?>
64. <beans xmlns="http://www.springframework.org/schema/beans"
65.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
66.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
68.     <bean id="peopleBean" >
70.     </bean>
72. </beans>System.out.println(catBean);
74.     }
75. }

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既然我们知道了：简单类型如何使用 set 注入了，那么我们就需要知道哪些是 简单类型了 ？
简单类型包括哪些呢？可以通过Spring的源码来分析一下：BeanUtils类

1.         /**
2.          * Check if the given type represents a "simple" value type: a primitive or
3.          * primitive wrapper, an enum, a String or other CharSequence, a Number, a
4.          * Date, a Temporal, a URI, a URL, a Locale, or a Class.
5.          * <p>{@code Void} and {@code void} are not considered simple value types.
6.          * @param type the type to check
7.          * @return whether the given type represents a "simple" value type
8.          * @see #isSimpleProperty(Class)
9.          */
10.         public static boolean isSimpleValueType(Class<?> type) {
11.                 return (Void.class != type && void.class != type &&
12.                                 (ClassUtils.isPrimitiveOrWrapper(type) ||
13.                                 Enum.class.isAssignableFrom(type) ||
14.                                 CharSequence.class.isAssignableFrom(type) ||
15.                                 Number.class.isAssignableFrom(type) ||
16.                                 Date.class.isAssignableFrom(type) ||
17.                                 Temporal.class.isAssignableFrom(type) ||
18.                                 URI.class == type ||
19.                                 URL.class == type ||
20.                                 Locale.class == type ||
21.                                 Class.class == type));
22.         }

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通过源码分析得知，简单类型包括：

• 基本数据类型
  
• 基本数据类型对应的包装类
  
• String或其他的CharSequence子类
  
• Number子类
  
• Date子类
  
• Enum子类
  
• URI
  
• URL
  
• Temporal子类
  
• Locale
  
• Class
  
• 另外还包括以上简单值类型对应的数组类型。
  

测试验证：

1. package com.rainbowsea.bean;
4. /**
5. * 枚举类
6. */
7. public enum Season {
8.     SPRING,SUMMER,AUTUMN,WINTER
9. }

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1. package com.rainbowsea.bean;
3. public class SimpleValueType {
5.     // 下面的都是简单的类型
6.     private int age;
7.     private Integer age2;
9.     private boolean flag;
10.     private Boolean flag2;
13.     private char c;
14.     private Character c2;
16.     private Season season;  // 枚举
18.     private String username;
20.     private Class clazz;
22.     // set 注入必须要：设置 set() 方法
23.     public void setAge(int age) {
24. <?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="peopleBean" >
31.     </bean>
33. </beans>this.age = age;
34.     }
36.     public void setAge2(Integer age2) {
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans>this.age2 = age2;
47.     }
49.     public void setFlag(boolean flag) {
50. <?xml version="1.0" encoding="UTF-8"?>
51. <beans xmlns="http://www.springframework.org/schema/beans"
52.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
53.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
55.     <bean id="peopleBean" >
57.     </bean>
59. </beans>this.flag = flag;
60.     }
62.     public void setFlag2(Boolean flag2) {
63. <?xml version="1.0" encoding="UTF-8"?>
64. <beans xmlns="http://www.springframework.org/schema/beans"
65.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
66.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
68.     <bean id="peopleBean" >
70.     </bean>
72. </beans>this.flag2 = flag2;
73.     }
75.     public void setC(char c) {
76. <?xml version="1.0" encoding="UTF-8"?>
77. <beans xmlns="http://www.springframework.org/schema/beans"
78.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
79.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
81.     <bean id="peopleBean" >
83.     </bean>
85. </beans>this.c = c;
86.     }
88.     public void setC2(Character c2) {
89. <?xml version="1.0" encoding="UTF-8"?>
90. <beans xmlns="http://www.springframework.org/schema/beans"
91.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
92.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
94.     <bean id="peopleBean" >
96.     </bean>
98. </beans>this.c2 = c2;
99.     }
101.     public void setSeason(Season season) {
102. <?xml version="1.0" encoding="UTF-8"?>
103. <beans xmlns="http://www.springframework.org/schema/beans"
104.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
105.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
107.     <bean id="peopleBean" >
109.     </bean>
111. </beans>this.season = season;
112.     }
114.     public void setUsername(String username) {
115. <?xml version="1.0" encoding="UTF-8"?>
116. <beans xmlns="http://www.springframework.org/schema/beans"
117.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
118.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
120.     <bean id="peopleBean" >
122.     </bean>
124. </beans>this.username = username;
125.     }
127.     public void setClazz(Class clazz) {
128. <?xml version="1.0" encoding="UTF-8"?>
129. <beans xmlns="http://www.springframework.org/schema/beans"
130.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
131.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
133.     <bean id="peopleBean" >
135.     </bean>
137. </beans>this.clazz = clazz;
138.     }
141.     @Override
142.     public String toString() {
143. <?xml version="1.0" encoding="UTF-8"?>
144. <beans xmlns="http://www.springframework.org/schema/beans"
145.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
146.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
148.     <bean id="peopleBean" >
150.     </bean>
152. </beans>return "SimpleValueType{" +
153. <?xml version="1.0" encoding="UTF-8"?>
154. <beans xmlns="http://www.springframework.org/schema/beans"
155.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
156.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
158.     <bean id="testDateBean" >
159. <?xml version="1.0" encoding="UTF-8"?>
160. <beans xmlns="http://www.springframework.org/schema/beans"
161.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
162.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
164.     <bean id="peopleBean" >
166.     </bean>
168. </beans><property name="date" value="2023 -05-6"></property>
169.     </bean>
170. </beans>"age=" + age +
171. <?xml version="1.0" encoding="UTF-8"?>
172. <beans xmlns="http://www.springframework.org/schema/beans"
173.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
174.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
176.     <bean id="testDateBean" >
177. <?xml version="1.0" encoding="UTF-8"?>
178. <beans xmlns="http://www.springframework.org/schema/beans"
179.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
180.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
182.     <bean id="peopleBean" >
184.     </bean>
186. </beans><property name="date" value="2023 -05-6"></property>
187.     </bean>
188. </beans>", age2=" + age2 +
189. <?xml version="1.0" encoding="UTF-8"?>
190. <beans xmlns="http://www.springframework.org/schema/beans"
191.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
192.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
194.     <bean id="testDateBean" >
195. <?xml version="1.0" encoding="UTF-8"?>
196. <beans xmlns="http://www.springframework.org/schema/beans"
197.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
198.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
200.     <bean id="peopleBean" >
202.     </bean>
204. </beans><property name="date" value="2023 -05-6"></property>
205.     </bean>
206. </beans>", flag=" + flag +
207. <?xml version="1.0" encoding="UTF-8"?>
208. <beans xmlns="http://www.springframework.org/schema/beans"
209.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
210.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
212.     <bean id="testDateBean" >
213. <?xml version="1.0" encoding="UTF-8"?>
214. <beans xmlns="http://www.springframework.org/schema/beans"
215.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
216.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
218.     <bean id="peopleBean" >
220.     </bean>
222. </beans><property name="date" value="2023 -05-6"></property>
223.     </bean>
224. </beans>", flag2=" + flag2 +
225. <?xml version="1.0" encoding="UTF-8"?>
226. <beans xmlns="http://www.springframework.org/schema/beans"
227.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
228.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
230.     <bean id="testDateBean" >
231. <?xml version="1.0" encoding="UTF-8"?>
232. <beans xmlns="http://www.springframework.org/schema/beans"
233.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
234.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
236.     <bean id="peopleBean" >
238.     </bean>
240. </beans><property name="date" value="2023 -05-6"></property>
241.     </bean>
242. </beans>", c=" + c +
243. <?xml version="1.0" encoding="UTF-8"?>
244. <beans xmlns="http://www.springframework.org/schema/beans"
245.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
246.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
248.     <bean id="testDateBean" >
249. <?xml version="1.0" encoding="UTF-8"?>
250. <beans xmlns="http://www.springframework.org/schema/beans"
251.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
252.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
254.     <bean id="peopleBean" >
256.     </bean>
258. </beans><property name="date" value="2023 -05-6"></property>
259.     </bean>
260. </beans>", c2=" + c2 +
261. <?xml version="1.0" encoding="UTF-8"?>
262. <beans xmlns="http://www.springframework.org/schema/beans"
263.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
264.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
266.     <bean id="testDateBean" >
267. <?xml version="1.0" encoding="UTF-8"?>
268. <beans xmlns="http://www.springframework.org/schema/beans"
269.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
270.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
272.     <bean id="peopleBean" >
274.     </bean>
276. </beans><property name="date" value="2023 -05-6"></property>
277.     </bean>
278. </beans>", season=" + season +
279. <?xml version="1.0" encoding="UTF-8"?>
280. <beans xmlns="http://www.springframework.org/schema/beans"
281.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
282.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
284.     <bean id="testDateBean" >
285. <?xml version="1.0" encoding="UTF-8"?>
286. <beans xmlns="http://www.springframework.org/schema/beans"
287.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
288.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
290.     <bean id="peopleBean" >
292.     </bean>
294. </beans><property name="date" value="2023 -05-6"></property>
295.     </bean>
296. </beans>", username='" + username + '\'' +
297. <?xml version="1.0" encoding="UTF-8"?>
298. <beans xmlns="http://www.springframework.org/schema/beans"
299.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
300.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
302.     <bean id="testDateBean" >
303. <?xml version="1.0" encoding="UTF-8"?>
304. <beans xmlns="http://www.springframework.org/schema/beans"
305.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
306.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
308.     <bean id="peopleBean" >
310.     </bean>
312. </beans><property name="date" value="2023 -05-6"></property>
313.     </bean>
314. </beans>", clazz=" + clazz +
315. <?xml version="1.0" encoding="UTF-8"?>
316. <beans xmlns="http://www.springframework.org/schema/beans"
317.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
318.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
320.     <bean id="testDateBean" >
321. <?xml version="1.0" encoding="UTF-8"?>
322. <beans xmlns="http://www.springframework.org/schema/beans"
323.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
324.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
326.     <bean id="peopleBean" >
328.     </bean>
330. </beans><property name="date" value="2023 -05-6"></property>
331.     </bean>
332. </beans>'}';
333.     }
334. }

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1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>    <bean id="" >
26. <?xml version="1.0" encoding="UTF-8"?>
27. <beans xmlns="http://www.springframework.org/schema/beans"
28.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
29.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
31.     <bean id="peopleBean" >
33.     </bean>
35. </beans><constructor-arg name="" value=""></constructor-arg>
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans><constructor-arg name="" ref=""></constructor-arg>
47.     </bean>    <bean id="" >
49. <?xml version="1.0" encoding="UTF-8"?>
50. <beans xmlns="http://www.springframework.org/schema/beans"
51.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
52.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
54.     <bean id="peopleBean" >
56.     </bean>
58. </beans><constructor-arg name="" value=""></constructor-arg>
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><constructor-arg name="" ref=""></constructor-arg>
70.     </bean>    <bean id="" >
72. <?xml version="1.0" encoding="UTF-8"?>
73. <beans xmlns="http://www.springframework.org/schema/beans"
74.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
75.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
77.     <bean id="peopleBean" >
79.     </bean>
81. </beans><constructor-arg name="" value=""></constructor-arg>
83. <?xml version="1.0" encoding="UTF-8"?>
84. <beans xmlns="http://www.springframework.org/schema/beans"
85.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
86.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
88.     <bean id="peopleBean" >
90.     </bean>
92. </beans><constructor-arg name="" ref=""></constructor-arg>
93.     </bean>   

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运行测试：

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.SimpleValueType;
3. import org.junit.Test;
4. import org.springframework.context.ApplicationContext;
5. import org.springframework.context.support.ClassPathXmlApplicationContext;
7. public class SpringStructure {
9.     @Test
10.     public void test() {
11. <?xml version="1.0" encoding="UTF-8"?>
12. <beans xmlns="http://www.springframework.org/schema/beans"
13.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
14.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
16.     <bean id="peopleBean" >
18.     </bean>
20. </beans>// 获取到对应的 spring6当中的xml的，容器对象
21. <?xml version="1.0" encoding="UTF-8"?>
22. <beans xmlns="http://www.springframework.org/schema/beans"
23.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
24.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
26.     <bean id="peopleBean" >
28.     </bean>
30. </beans>// 面向接口编程，左边为接口，
31. <?xml version="1.0" encoding="UTF-8"?>
32. <beans xmlns="http://www.springframework.org/schema/beans"
33.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
34.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
36.     <bean id="peopleBean" >
38.     </bean>
40. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
41. <?xml version="1.0" encoding="UTF-8"?>
42. <beans xmlns="http://www.springframework.org/schema/beans"
43.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
44.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
46.     <bean id="peopleBean" >
48.     </bean>
50. </beans>// 通过 id 获取到对应的类/class
51. <?xml version="1.0" encoding="UTF-8"?>
52. <beans xmlns="http://www.springframework.org/schema/beans"
53.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
54.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
56.     <bean id="peopleBean" >
58.     </bean>
60. </beans>SimpleValueType svt = applicationContext.getBean("svt", SimpleValueType.class);
61. <?xml version="1.0" encoding="UTF-8"?>
62. <beans xmlns="http://www.springframework.org/schema/beans"
63.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
64.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
66.     <bean id="peopleBean" >
68.     </bean>
70. </beans>System.out.println(svt);
71.     }
72. }

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注意了： 特殊的日期时间进行一个特殊的赋值：
从上面的  BeanUtils 我们可以知道的的是  Date ，它是被Spring定义为了一个简单类型，来进行处理的。
但是，我们进行一个如下的测试：

1. package com.rainbowsea.bean;
3. import java.util.Date;
5. public class TestDate {
6.     private Date date;
8.     public void setDate(Date date) {
9. <?xml version="1.0" encoding="UTF-8"?>
10. <beans xmlns="http://www.springframework.org/schema/beans"
11.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
12.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
14.     <bean id="peopleBean" >
16.     </bean>
18. </beans>this.date = date;
19.     }
21.     @Override
22.     public String toString() {
23. <?xml version="1.0" encoding="UTF-8"?>
24. <beans xmlns="http://www.springframework.org/schema/beans"
25.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
28.     <bean id="peopleBean" >
30.     </bean>
32. </beans>return "TestDate{" +
33. <?xml version="1.0" encoding="UTF-8"?>
34. <beans xmlns="http://www.springframework.org/schema/beans"
35.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
38.     <bean id="testDateBean" >
39. <?xml version="1.0" encoding="UTF-8"?>
40. <beans xmlns="http://www.springframework.org/schema/beans"
41.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
42.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
44.     <bean id="peopleBean" >
46.     </bean>
48. </beans><property name="date" value="2023 -05-6"></property>
49.     </bean>
50. </beans>"date=" + date +
51. <?xml version="1.0" encoding="UTF-8"?>
52. <beans xmlns="http://www.springframework.org/schema/beans"
53.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
54.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
56.     <bean id="testDateBean" >
57. <?xml version="1.0" encoding="UTF-8"?>
58. <beans xmlns="http://www.springframework.org/schema/beans"
59.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
60.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
62.     <bean id="peopleBean" >
64.     </bean>
66. </beans><property name="date" value="2023 -05-6"></property>
67.     </bean>
68. </beans>'}';
69.     }
70. }

复制代码

1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="testDateBean" >
7. <?xml version="1.0" encoding="UTF-8"?>
8. <beans xmlns="http://www.springframework.org/schema/beans"
9.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
10.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
12.     <bean id="peopleBean" >
14.     </bean>
16. </beans><property name="date" value="2023 -05-6"></property>
17.     </bean>
18. </beans>

复制代码

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.SimpleValueType;
3. import com.rainbowsea.bean.TestDate;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>TestDate testDate = applicationContext.getBean("date", TestDate.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(testDate);
72.     }
73. }

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报错的原因是：

从报错的信息上，我们可以看到:
[
说：'java.lang.String' to required type 'java.util.Date'  说 这个  2023 -05-6 这个字符串，无法转换成 java.util.Date 类型。  如果你硬要把Date 当作简单类型的话，使用 value 赋值的话，这个日期字符串格式有要求的。所有的要求就是： new Date toString 打印显示的格式形式： Fri Jun 30 11:27:41 CST 2023 。
但是，我们在实际开发中，我们一般不会把 Date 当做简单类型，虽然是简单类型，但是我们一般采用的是ref 的Date 类型的属性赋值。

• 如果把Date当做简单类型的话，日期字符串格式不能随便写。格式必须符合Date的toString()方法格式。显然这就比较鸡肋了。如果我们提供一个这样的日期字符串：2010-10-11，在这里是无法赋值给Date类型的属性的。
  
• spring6之后，当注入的是URL，那么这个url字符串是会进行有效性检测的。如果是一个存在的url，那就没问题。如果不存在则报错。
  

测试使用: 我们要求的格式：  Fri Jun 30 11:27:41 CST 2023  进行一个 Date 的测试

1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="testDateBean" >
7. <?xml version="1.0" encoding="UTF-8"?>
8. <beans xmlns="http://www.springframework.org/schema/beans"
9.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
10.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
12.     <bean id="peopleBean" >
14.     </bean>
16. </beans><property name="date" value="2023 -05-6"></property>
17.     </bean>
18. </beans>

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测试：

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.SimpleValueType;
3. import com.rainbowsea.bean.TestDate;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>TestDate testDate = applicationContext.getBean("testDateBean", TestDate.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(testDate);
72.     }
73. }

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测试将  Date 当作为复杂类型进行一个set  注入的方式：测试

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>   

复制代码

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.SimpleValueType;
3. import com.rainbowsea.bean.TestDate;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>TestDate testDate = applicationContext.getBean("testDateBean", TestDate.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(testDate);
72.     }
73. }

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经典案例：给数据源的属性注入值：
假设我们现在要自己手写一个数据源，我们都知道所有的数据源都要实现javax.sql.DataSource接口，并且数据源中应该有连接数据库的信息，例如：driver、url、username、password等。

1. package com.rainbowsea.bean;import javax.sql.DataSource;import java.io.PrintWriter;import java.sql.Connection;import java.sql.SQLException;import java.sql.SQLFeatureNotSupportedException;import java.util.logging.Logger;public class MyDataSource implements DataSource {    private String driver;    private String url;    private String username;    private String password;    // set 注入必须提供 set () 方法    public void setDriver(String driver) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.driver = driver;    }    public void setUrl(String url) {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>this.url = url;    }    public void setUsername(String username) {<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="peopleBean" >
26.     </bean>
28. </beans>this.username = username;    }    public void setPassword(String password) {<?xml version="1.0" encoding="UTF-8"?>
29. <beans xmlns="http://www.springframework.org/schema/beans"
30.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
31.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
33.     <bean id="peopleBean" >
35.     </bean>
37. </beans>this.password = password;    }    @Override    public Connection getConnection() throws SQLException {<?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans>return null;    }    @Override    public Connection getConnection(String username, String password) throws SQLException {<?xml version="1.0" encoding="UTF-8"?>
47. <beans xmlns="http://www.springframework.org/schema/beans"
48.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
49.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
51.     <bean id="peopleBean" >
53.     </bean>
55. </beans>return null;    }    @Override    public PrintWriter getLogWriter() throws SQLException {<?xml version="1.0" encoding="UTF-8"?>
56. <beans xmlns="http://www.springframework.org/schema/beans"
57.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
58.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
60.     <bean id="peopleBean" >
62.     </bean>
64. </beans>return null;    }    @Override    public void setLogWriter(PrintWriter out) throws SQLException {    }    @Override    public void setLoginTimeout(int seconds) throws SQLException {    }    @Override    public int getLoginTimeout() throws SQLException {<?xml version="1.0" encoding="UTF-8"?>
65. <beans xmlns="http://www.springframework.org/schema/beans"
66.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
67.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
69.     <bean id="peopleBean" >
71.     </bean>
73. </beans>return 0;    }    @Override    public Logger getParentLogger() throws SQLFeatureNotSupportedException {<?xml version="1.0" encoding="UTF-8"?>
74. <beans xmlns="http://www.springframework.org/schema/beans"
75.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
76.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
78.     <bean id="peopleBean" >
80.     </bean>
82. </beans>return null;    }    @Override    public  T unwrap(Class iface) throws SQLException {<?xml version="1.0" encoding="UTF-8"?>
83. <beans xmlns="http://www.springframework.org/schema/beans"
84.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
85.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
87.     <bean id="peopleBean" >
89.     </bean>
91. </beans>return null;    }    @Override    public boolean isWrapperFor(Class iface) throws SQLException {<?xml version="1.0" encoding="UTF-8"?>
92. <beans xmlns="http://www.springframework.org/schema/beans"
93.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
94.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
96.     <bean id="peopleBean" >
98.     </bean>
100. </beans>return false;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
101. <beans xmlns="http://www.springframework.org/schema/beans"
102.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
103.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
105.     <bean id="peopleBean" >
107.     </bean>
109. </beans>return "MyDataSource{" +<?xml version="1.0" encoding="UTF-8"?>
110. <beans xmlns="http://www.springframework.org/schema/beans"
111.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
112.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
114.     <bean id="testDateBean" >
115. <?xml version="1.0" encoding="UTF-8"?>
116. <beans xmlns="http://www.springframework.org/schema/beans"
117.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
118.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
120.     <bean id="peopleBean" >
122.     </bean>
124. </beans><property name="date" value="2023 -05-6"></property>
125.     </bean>
126. </beans>"driver='" + driver + '\'' +<?xml version="1.0" encoding="UTF-8"?>
127. <beans xmlns="http://www.springframework.org/schema/beans"
128.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
129.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
131.     <bean id="testDateBean" >
132. <?xml version="1.0" encoding="UTF-8"?>
133. <beans xmlns="http://www.springframework.org/schema/beans"
134.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
135.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
137.     <bean id="peopleBean" >
139.     </bean>
141. </beans><property name="date" value="2023 -05-6"></property>
142.     </bean>
143. </beans>", url='" + url + '\'' +<?xml version="1.0" encoding="UTF-8"?>
144. <beans xmlns="http://www.springframework.org/schema/beans"
145.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
146.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
148.     <bean id="testDateBean" >
149. <?xml version="1.0" encoding="UTF-8"?>
150. <beans xmlns="http://www.springframework.org/schema/beans"
151.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
152.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
154.     <bean id="peopleBean" >
156.     </bean>
158. </beans><property name="date" value="2023 -05-6"></property>
159.     </bean>
160. </beans>", username='" + username + '\'' +<?xml version="1.0" encoding="UTF-8"?>
161. <beans xmlns="http://www.springframework.org/schema/beans"
162.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
163.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
165.     <bean id="testDateBean" >
166. <?xml version="1.0" encoding="UTF-8"?>
167. <beans xmlns="http://www.springframework.org/schema/beans"
168.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
169.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
171.     <bean id="peopleBean" >
173.     </bean>
175. </beans><property name="date" value="2023 -05-6"></property>
176.     </bean>
177. </beans>", password='" + password + '\'' +<?xml version="1.0" encoding="UTF-8"?>
178. <beans xmlns="http://www.springframework.org/schema/beans"
179.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
180.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
182.     <bean id="testDateBean" >
183. <?xml version="1.0" encoding="UTF-8"?>
184. <beans xmlns="http://www.springframework.org/schema/beans"
185.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
186.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
188.     <bean id="peopleBean" >
190.     </bean>
192. </beans><property name="date" value="2023 -05-6"></property>
193.     </bean>
194. </beans>'}';    }}

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1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="testDateBean" >
30. <?xml version="1.0" encoding="UTF-8"?>
31. <beans xmlns="http://www.springframework.org/schema/beans"
32.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
33.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
35.     <bean id="peopleBean" >
37.     </bean>
39. </beans><property name="date" value="2023 -05-6"></property>
40.     </bean>
41. </beans>

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运行测试：

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.MyDataSource;
3. import org.junit.Test;
4. import org.springframework.context.ApplicationContext;
5. import org.springframework.context.support.ClassPathXmlApplicationContext;
7. public class SpringStructure {
9.     @Test
10.     public void test() {
11. <?xml version="1.0" encoding="UTF-8"?>
12. <beans xmlns="http://www.springframework.org/schema/beans"
13.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
14.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
16.     <bean id="peopleBean" >
18.     </bean>
20. </beans>// 获取到对应的 spring6当中的xml的，容器对象
21. <?xml version="1.0" encoding="UTF-8"?>
22. <beans xmlns="http://www.springframework.org/schema/beans"
23.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
24.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
26.     <bean id="peopleBean" >
28.     </bean>
30. </beans>// 面向接口编程，左边为接口，
31. <?xml version="1.0" encoding="UTF-8"?>
32. <beans xmlns="http://www.springframework.org/schema/beans"
33.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
34.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
36.     <bean id="peopleBean" >
38.     </bean>
40. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
41. <?xml version="1.0" encoding="UTF-8"?>
42. <beans xmlns="http://www.springframework.org/schema/beans"
43.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
44.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
46.     <bean id="peopleBean" >
48.     </bean>
50. </beans>// 通过 id 获取到对应的类/class
51. <?xml version="1.0" encoding="UTF-8"?>
52. <beans xmlns="http://www.springframework.org/schema/beans"
53.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
54.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
56.     <bean id="peopleBean" >
58.     </bean>
60. </beans>MyDataSource data = applicationContext.getBean("data", MyDataSource.class);
61. <?xml version="1.0" encoding="UTF-8"?>
62. <beans xmlns="http://www.springframework.org/schema/beans"
63.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
64.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
66.     <bean id="peopleBean" >
68.     </bean>
70. </beans>System.out.println(data);
71.     }
72. }

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2.3.2 set 复杂类型注入的方式

格式：

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="peopleBean" >
31.     </bean>
33. </beans>

复制代码

1. package com.rainbowsea.bean;public class User {    private String name;    public void setName(String name) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.name = name;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "User{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"name='" + name + '\'' +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

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1. package com.rainbowsea.bean;public class People {    private User user;    private String name;    public void setUser(User user) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.user = user;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"user=" + user +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

复制代码

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="peopleBean" >
31.     </bean>
33. </beans>

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运行测试：

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.MyDataSource;
3. import com.rainbowsea.bean.People;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(peopleBean);
72.     }
73. }

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2.4 级联属性赋值

级联的要求：

• 对应级联的类下的属性的赋值，必须提供 get() 方法，因为级联的底层调用的就是 get() 方法。不然无法级联到。
  
• 注意：级联的上下放置的顺序，级联当中的使用的 id ,必须在级联之前先定义处理出来，不然同样无法级联到。
  

1. package com.rainbowsea.bean;public class User {    private String name;    public void setName(String name) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.name = name;    }<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>@Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="peopleBean" >
26.     </bean>
28. </beans>return "User{" +<?xml version="1.0" encoding="UTF-8"?>
29. <beans xmlns="http://www.springframework.org/schema/beans"
30.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
31.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
33.     <bean id="testDateBean" >
34. <?xml version="1.0" encoding="UTF-8"?>
35. <beans xmlns="http://www.springframework.org/schema/beans"
36.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
37.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
39.     <bean id="peopleBean" >
41.     </bean>
43. </beans><property name="date" value="2023 -05-6"></property>
44.     </bean>
45. </beans>"name='" + name + '\'' +<?xml version="1.0" encoding="UTF-8"?>
46. <beans xmlns="http://www.springframework.org/schema/beans"
47.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
48.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
50.     <bean id="testDateBean" >
51. <?xml version="1.0" encoding="UTF-8"?>
52. <beans xmlns="http://www.springframework.org/schema/beans"
53.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
54.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
56.     <bean id="peopleBean" >
58.     </bean>
60. </beans><property name="date" value="2023 -05-6"></property>
61.     </bean>
62. </beans>'}';    }}

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1. package com.rainbowsea.bean;public class People {    private User user;    private String name;    public void setUser(User user) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.user = user;    }    public void setName(String name) {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>this.name = name;    }    // 使用级联的话，必须提供其中的 get() 方法进行一个获取    // 级联的底层调用的就是 get()方法。    public User getUser() {<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="peopleBean" >
26.     </bean>
28. </beans>return user;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
29. <beans xmlns="http://www.springframework.org/schema/beans"
30.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
31.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
33.     <bean id="peopleBean" >
35.     </bean>
37. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="testDateBean" >
43. <?xml version="1.0" encoding="UTF-8"?>
44. <beans xmlns="http://www.springframework.org/schema/beans"
45.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
48.     <bean id="peopleBean" >
50.     </bean>
52. </beans><property name="date" value="2023 -05-6"></property>
53.     </bean>
54. </beans>"user=" + user +<?xml version="1.0" encoding="UTF-8"?>
55. <beans xmlns="http://www.springframework.org/schema/beans"
56.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
57.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
59.     <bean id="testDateBean" >
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><property name="date" value="2023 -05-6"></property>
70.     </bean>
71. </beans>", name='" + name + '\'' +<?xml version="1.0" encoding="UTF-8"?>
72. <beans xmlns="http://www.springframework.org/schema/beans"
73.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
74.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
76.     <bean id="testDateBean" >
77. <?xml version="1.0" encoding="UTF-8"?>
78. <beans xmlns="http://www.springframework.org/schema/beans"
79.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
80.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
82.     <bean id="peopleBean" >
84.     </bean>
86. </beans><property name="date" value="2023 -05-6"></property>
87.     </bean>
88. </beans>'}';    }}

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1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30. <?xml version="1.0" encoding="UTF-8"?>
31. <beans xmlns="http://www.springframework.org/schema/beans"
32.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
33.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
35.     <bean id="peopleBean" >
37.     </bean>
39. </beans><constructor-arg index="0" value=""></constructor-arg>
41. <?xml version="1.0" encoding="UTF-8"?>
42. <beans xmlns="http://www.springframework.org/schema/beans"
43.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
44.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
46.     <bean id="peopleBean" >
48.     </bean>
50. </beans><constructor-arg index="1" ref=""></constructor-arg>
51.     </bean>
52. </beans>

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运行测试：

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.MyDataSource;
3. import com.rainbowsea.bean.People;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(peopleBean);
72.     }
73. }

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级联用的比较少，所以大家了解一下就好了。
2.5 set 注入数组类型

关于set 数组类型的注入的方式：
格式：

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>    <bean id="" >
26. <?xml version="1.0" encoding="UTF-8"?>
27. <beans xmlns="http://www.springframework.org/schema/beans"
28.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
29.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
31.     <bean id="peopleBean" >
33.     </bean>
35. </beans><constructor-arg name="" value=""></constructor-arg>
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans><constructor-arg name="" ref=""></constructor-arg>
47.     </bean>    <bean id="" >
49. <?xml version="1.0" encoding="UTF-8"?>
50. <beans xmlns="http://www.springframework.org/schema/beans"
51.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
52.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
54.     <bean id="peopleBean" >
56.     </bean>
58. </beans><constructor-arg name="" value=""></constructor-arg>
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><constructor-arg name="" ref=""></constructor-arg>
70.     </bean>    <bean id="" >
72. <?xml version="1.0" encoding="UTF-8"?>
73. <beans xmlns="http://www.springframework.org/schema/beans"
74.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
75.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
77.     <bean id="peopleBean" >
79.     </bean>
81. </beans><constructor-arg name="" value=""></constructor-arg>
83. <?xml version="1.0" encoding="UTF-8"?>
84. <beans xmlns="http://www.springframework.org/schema/beans"
85.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
86.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
88.     <bean id="peopleBean" >
90.     </bean>
92. </beans><constructor-arg name="" ref=""></constructor-arg>
93.     </bean>   

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2.5.1 当数组中的元素是简单类型

1. package com.rainbowsea.bean;import java.util.Arrays;public class People {    private String[] name;    public void setName(String[] name) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.name = name;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"name=" + Arrays.toString(name) +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

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1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30. <?xml version="1.0" encoding="UTF-8"?>
31. <beans xmlns="http://www.springframework.org/schema/beans"
32.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
33.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
35.     <bean id="peopleBean" >
37.     </bean>
39. </beans><constructor-arg index="0" value=""></constructor-arg>
41. <?xml version="1.0" encoding="UTF-8"?>
42. <beans xmlns="http://www.springframework.org/schema/beans"
43.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
44.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
46.     <bean id="peopleBean" >
48.     </bean>
50. </beans><constructor-arg index="1" ref=""></constructor-arg>
51.     </bean>
52. </beans>张三<?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="testDateBean" >
58. <?xml version="1.0" encoding="UTF-8"?>
59. <beans xmlns="http://www.springframework.org/schema/beans"
60.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
61.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
63.     <bean id="peopleBean" >
65.     </bean>
67. </beans><property name="date" value="2023 -05-6"></property>
68.     </bean>
69. </beans>李四<?xml version="1.0" encoding="UTF-8"?>
70. <beans xmlns="http://www.springframework.org/schema/beans"
71.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
72.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
74.     <bean id="testDateBean" >
75. <?xml version="1.0" encoding="UTF-8"?>
76. <beans xmlns="http://www.springframework.org/schema/beans"
77.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
78.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
80.     <bean id="peopleBean" >
82.     </bean>
84. </beans><property name="date" value="2023 -05-6"></property>
85.     </bean>
86. </beans>王五    <bean id="" >
88. <?xml version="1.0" encoding="UTF-8"?>
89. <beans xmlns="http://www.springframework.org/schema/beans"
90.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
91.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
93.     <bean id="peopleBean" >
95.     </bean>
97. </beans><constructor-arg name="" value=""></constructor-arg>
99. <?xml version="1.0" encoding="UTF-8"?>
100. <beans xmlns="http://www.springframework.org/schema/beans"
101.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
102.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
104.     <bean id="peopleBean" >
106.     </bean>
108. </beans><constructor-arg name="" ref=""></constructor-arg>
109.     </bean>

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运行测试：

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="testDateBean" >
30. <?xml version="1.0" encoding="UTF-8"?>
31. <beans xmlns="http://www.springframework.org/schema/beans"
32.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
33.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
35.     <bean id="peopleBean" >
37.     </bean>
39. </beans><property name="date" value="2023 -05-6"></property>
40.     </bean>
41. </beans>张三<?xml version="1.0" encoding="UTF-8"?>
42. <beans xmlns="http://www.springframework.org/schema/beans"
43.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
44.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
46.     <bean id="testDateBean" >
47. <?xml version="1.0" encoding="UTF-8"?>
48. <beans xmlns="http://www.springframework.org/schema/beans"
49.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
50.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
52.     <bean id="peopleBean" >
54.     </bean>
56. </beans><property name="date" value="2023 -05-6"></property>
57.     </bean>
58. </beans>李四<?xml version="1.0" encoding="UTF-8"?>
59. <beans xmlns="http://www.springframework.org/schema/beans"
60.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
61.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
63.     <bean id="testDateBean" >
64. <?xml version="1.0" encoding="UTF-8"?>
65. <beans xmlns="http://www.springframework.org/schema/beans"
66.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
67.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
69.     <bean id="peopleBean" >
71.     </bean>
73. </beans><property name="date" value="2023 -05-6"></property>
74.     </bean>
75. </beans>王五    <bean id="" >
77. <?xml version="1.0" encoding="UTF-8"?>
78. <beans xmlns="http://www.springframework.org/schema/beans"
79.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
80.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
82.     <bean id="peopleBean" >
84.     </bean>
86. </beans><constructor-arg name="" value=""></constructor-arg>
88. <?xml version="1.0" encoding="UTF-8"?>
89. <beans xmlns="http://www.springframework.org/schema/beans"
90.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
91.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
93.     <bean id="peopleBean" >
95.     </bean>
97. </beans><constructor-arg name="" ref=""></constructor-arg>
98.     </bean>

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2.5.2 当数组中的元素是复杂类型

格式:

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>    <bean id="" >
26. <?xml version="1.0" encoding="UTF-8"?>
27. <beans xmlns="http://www.springframework.org/schema/beans"
28.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
29.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
31.     <bean id="peopleBean" >
33.     </bean>
35. </beans><constructor-arg name="" value=""></constructor-arg>
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans><constructor-arg name="" ref=""></constructor-arg>
47.     </bean>    <bean id="" >
49. <?xml version="1.0" encoding="UTF-8"?>
50. <beans xmlns="http://www.springframework.org/schema/beans"
51.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
52.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
54.     <bean id="peopleBean" >
56.     </bean>
58. </beans><constructor-arg name="" value=""></constructor-arg>
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><constructor-arg name="" ref=""></constructor-arg>
70.     </bean>    <bean id="" >
72. <?xml version="1.0" encoding="UTF-8"?>
73. <beans xmlns="http://www.springframework.org/schema/beans"
74.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
75.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
77.     <bean id="peopleBean" >
79.     </bean>
81. </beans><constructor-arg name="" value=""></constructor-arg>
83. <?xml version="1.0" encoding="UTF-8"?>
84. <beans xmlns="http://www.springframework.org/schema/beans"
85.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
86.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
88.     <bean id="peopleBean" >
90.     </bean>
92. </beans><constructor-arg name="" ref=""></constructor-arg>
93.     </bean><?xml version="1.0" encoding="UTF-8"?>
94. <beans xmlns="http://www.springframework.org/schema/beans"
95.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
96.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
98.     <bean id="testDateBean" >
99. <?xml version="1.0" encoding="UTF-8"?>
100. <beans xmlns="http://www.springframework.org/schema/beans"
101.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
102.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
104.     <bean id="peopleBean" >
106.     </bean>
108. </beans><property name="date" value="2023 -05-6"></property>
109.     </bean>
110. </beans>

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**举例: **

1. package com.rainbowsea.bean;public class User {    private String name;    public void setName(String name) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.name = name;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "User{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"name='" + name + '\'' +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

复制代码

1. package com.rainbowsea.bean;import java.util.Arrays;public class People {    private User[] users;    public void setUsers(User[] users) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.users = users;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"users=" + Arrays.toString(users) +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

复制代码

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>    <bean id="" >
26. <?xml version="1.0" encoding="UTF-8"?>
27. <beans xmlns="http://www.springframework.org/schema/beans"
28.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
29.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
31.     <bean id="peopleBean" >
33.     </bean>
35. </beans><constructor-arg name="" value=""></constructor-arg>
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans><constructor-arg name="" ref=""></constructor-arg>
47.     </bean>    <bean id="" >
49. <?xml version="1.0" encoding="UTF-8"?>
50. <beans xmlns="http://www.springframework.org/schema/beans"
51.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
52.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
54.     <bean id="peopleBean" >
56.     </bean>
58. </beans><constructor-arg name="" value=""></constructor-arg>
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><constructor-arg name="" ref=""></constructor-arg>
70.     </bean>    <bean id="" >
72. <?xml version="1.0" encoding="UTF-8"?>
73. <beans xmlns="http://www.springframework.org/schema/beans"
74.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
75.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
77.     <bean id="peopleBean" >
79.     </bean>
81. </beans><constructor-arg name="" value=""></constructor-arg>
83. <?xml version="1.0" encoding="UTF-8"?>
84. <beans xmlns="http://www.springframework.org/schema/beans"
85.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
86.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
88.     <bean id="peopleBean" >
90.     </bean>
92. </beans><constructor-arg name="" ref=""></constructor-arg>
93.     </bean><?xml version="1.0" encoding="UTF-8"?>
94. <beans xmlns="http://www.springframework.org/schema/beans"
95.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
96.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
98.     <bean id="testDateBean" >
99. <?xml version="1.0" encoding="UTF-8"?>
100. <beans xmlns="http://www.springframework.org/schema/beans"
101.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
102.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
104.     <bean id="peopleBean" >
106.     </bean>
108. </beans><property name="date" value="2023 -05-6"></property>
109.     </bean>
110. </beans>

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运行测试：

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.MyDataSource;
3. import com.rainbowsea.bean.People;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(peopleBean);
72.     }
73. }

复制代码

2.6 set注入List集合类型

List集合：有序可重复
2.6.1 set 注入 List集合简单类型

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="testDateBean" >
30. <?xml version="1.0" encoding="UTF-8"?>
31. <beans xmlns="http://www.springframework.org/schema/beans"
32.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
33.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
35.     <bean id="peopleBean" >
37.     </bean>
39. </beans><property name="date" value="2023 -05-6"></property>
40.     </bean>
41. </beans>张三<?xml version="1.0" encoding="UTF-8"?>
42. <beans xmlns="http://www.springframework.org/schema/beans"
43.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
44.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
46.     <bean id="testDateBean" >
47. <?xml version="1.0" encoding="UTF-8"?>
48. <beans xmlns="http://www.springframework.org/schema/beans"
49.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
50.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
52.     <bean id="peopleBean" >
54.     </bean>
56. </beans><property name="date" value="2023 -05-6"></property>
57.     </bean>
58. </beans>李四    <bean id="" >
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><constructor-arg name="" value=""></constructor-arg>
71. <?xml version="1.0" encoding="UTF-8"?>
72. <beans xmlns="http://www.springframework.org/schema/beans"
73.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
74.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
76.     <bean id="peopleBean" >
78.     </bean>
80. </beans><constructor-arg name="" ref=""></constructor-arg>
81.     </bean>

复制代码

1. package com.rainbowsea.bean;import java.util.List;public class People { private List name;    public void setName(List name) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.name = name;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"name=" + name +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

复制代码

运行测试：

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.MyDataSource;
3. import com.rainbowsea.bean.People;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(peopleBean);
72.     }
73. }

复制代码

2.6.2 set 注入List集合复杂类型

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>    <bean id="" >
26. <?xml version="1.0" encoding="UTF-8"?>
27. <beans xmlns="http://www.springframework.org/schema/beans"
28.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
29.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
31.     <bean id="peopleBean" >
33.     </bean>
35. </beans><constructor-arg name="" value=""></constructor-arg>
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans><constructor-arg name="" ref=""></constructor-arg>
47.     </bean>    <bean id="" >
49. <?xml version="1.0" encoding="UTF-8"?>
50. <beans xmlns="http://www.springframework.org/schema/beans"
51.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
52.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
54.     <bean id="peopleBean" >
56.     </bean>
58. </beans><constructor-arg name="" value=""></constructor-arg>
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><constructor-arg name="" ref=""></constructor-arg>
70.     </bean>    <bean id="" >
72. <?xml version="1.0" encoding="UTF-8"?>
73. <beans xmlns="http://www.springframework.org/schema/beans"
74.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
75.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
77.     <bean id="peopleBean" >
79.     </bean>
81. </beans><constructor-arg name="" value=""></constructor-arg>
83. <?xml version="1.0" encoding="UTF-8"?>
84. <beans xmlns="http://www.springframework.org/schema/beans"
85.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
86.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
88.     <bean id="peopleBean" >
90.     </bean>
92. </beans><constructor-arg name="" ref=""></constructor-arg>
93.     </bean><?xml version="1.0" encoding="UTF-8"?>
94. <beans xmlns="http://www.springframework.org/schema/beans"
95.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
96.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
98.     <bean id="testDateBean" >
99. <?xml version="1.0" encoding="UTF-8"?>
100. <beans xmlns="http://www.springframework.org/schema/beans"
101.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
102.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
104.     <bean id="peopleBean" >
106.     </bean>
108. </beans><property name="date" value="2023 -05-6"></property>
109.     </bean>
110. </beans>

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1. package com.rainbowsea.bean;public class User {    private String name;    public void setName(String name) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.name = name;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "User{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"name='" + name + '\'' +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

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1. package com.rainbowsea.bean;import java.util.List;public class People { private List users;    public void setUsers(List users) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.users = users;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"users=" + users +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

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运行测试：

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.MyDataSource;
3. import com.rainbowsea.bean.People;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(peopleBean);
72.     }
73. }

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注意：注入List集合的时候使用list标签，如果List集合中是简单类型使用value标签，反之使用ref标签。
2.7 set注入Set集合类型

Set集合：无序不可重复
2.7.1 set 注入 Set集合简单类型

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="testDateBean" >
30. <?xml version="1.0" encoding="UTF-8"?>
31. <beans xmlns="http://www.springframework.org/schema/beans"
32.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
33.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
35.     <bean id="peopleBean" >
37.     </bean>
39. </beans><property name="date" value="2023 -05-6"></property>
40.     </bean>
41. </beans>张三<?xml version="1.0" encoding="UTF-8"?>
42. <beans xmlns="http://www.springframework.org/schema/beans"
43.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
44.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
46.     <bean id="testDateBean" >
47. <?xml version="1.0" encoding="UTF-8"?>
48. <beans xmlns="http://www.springframework.org/schema/beans"
49.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
50.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
52.     <bean id="peopleBean" >
54.     </bean>
56. </beans><property name="date" value="2023 -05-6"></property>
57.     </bean>
58. </beans>李四    <bean id="" >
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><constructor-arg name="" value=""></constructor-arg>
71. <?xml version="1.0" encoding="UTF-8"?>
72. <beans xmlns="http://www.springframework.org/schema/beans"
73.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
74.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
76.     <bean id="peopleBean" >
78.     </bean>
80. </beans><constructor-arg name="" ref=""></constructor-arg>
81.     </bean>

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1. package com.rainbowsea.bean;import java.util.Set;public class People { private Set names;    public void setNames(Set names) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.names = names;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"names=" + names +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

复制代码

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.MyDataSource;
3. import com.rainbowsea.bean.People;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(peopleBean);
72.     }
73. }

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2.7.2 set 注入Set集合复杂类型

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>    <bean id="" >
26. <?xml version="1.0" encoding="UTF-8"?>
27. <beans xmlns="http://www.springframework.org/schema/beans"
28.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
29.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
31.     <bean id="peopleBean" >
33.     </bean>
35. </beans><constructor-arg name="" value=""></constructor-arg>
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans><constructor-arg name="" ref=""></constructor-arg>
47.     </bean>    <bean id="" >
49. <?xml version="1.0" encoding="UTF-8"?>
50. <beans xmlns="http://www.springframework.org/schema/beans"
51.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
52.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
54.     <bean id="peopleBean" >
56.     </bean>
58. </beans><constructor-arg name="" value=""></constructor-arg>
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><constructor-arg name="" ref=""></constructor-arg>
70.     </bean>    <bean id="" >
72. <?xml version="1.0" encoding="UTF-8"?>
73. <beans xmlns="http://www.springframework.org/schema/beans"
74.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
75.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
77.     <bean id="peopleBean" >
79.     </bean>
81. </beans><constructor-arg name="" value=""></constructor-arg>
83. <?xml version="1.0" encoding="UTF-8"?>
84. <beans xmlns="http://www.springframework.org/schema/beans"
85.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
86.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
88.     <bean id="peopleBean" >
90.     </bean>
92. </beans><constructor-arg name="" ref=""></constructor-arg>
93.     </bean><?xml version="1.0" encoding="UTF-8"?>
94. <beans xmlns="http://www.springframework.org/schema/beans"
95.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
96.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
98.     <bean id="testDateBean" >
99. <?xml version="1.0" encoding="UTF-8"?>
100. <beans xmlns="http://www.springframework.org/schema/beans"
101.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
102.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
104.     <bean id="peopleBean" >
106.     </bean>
108. </beans><property name="date" value="2023 -05-6"></property>
109.     </bean>
110. </beans>

复制代码

1. package com.rainbowsea.bean;public class User {    private String name;    public void setName(String name) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.name = name;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "User{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"name='" + name + '\'' +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

复制代码

1. package com.rainbowsea.bean;import java.util.Set;public class People { private Set users;    public void setUsers(Set users) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.users = users;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"users=" + users +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

复制代码

运行测试：

1. package com.rainbowsea.test;
2. import com.rainbowsea.bean.MyDataSource;
3. import com.rainbowsea.bean.People;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(peopleBean);
72.     }
73. }

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2.8 set注入Map集合

2.8.1 set 注入的Map集合简单类型

要点：

• 使用标签
  
• 如果key是简单类型，使用 key 属性，反之使用 key-ref 属性。
  
• 如果value是简单类型，使用 value 属性，反之使用 value-ref 属性。
  

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>    <bean id="" >
26. <?xml version="1.0" encoding="UTF-8"?>
27. <beans xmlns="http://www.springframework.org/schema/beans"
28.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
29.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
31.     <bean id="peopleBean" >
33.     </bean>
35. </beans><constructor-arg name="" value=""></constructor-arg>
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans><constructor-arg name="" ref=""></constructor-arg>
47.     </bean>    <bean id="" >
49. <?xml version="1.0" encoding="UTF-8"?>
50. <beans xmlns="http://www.springframework.org/schema/beans"
51.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
52.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
54.     <bean id="peopleBean" >
56.     </bean>
58. </beans><constructor-arg name="" value=""></constructor-arg>
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><constructor-arg name="" ref=""></constructor-arg>
70.     </bean>    <bean id="" >
72. <?xml version="1.0" encoding="UTF-8"?>
73. <beans xmlns="http://www.springframework.org/schema/beans"
74.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
75.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
77.     <bean id="peopleBean" >
79.     </bean>
81. </beans><constructor-arg name="" value=""></constructor-arg>
83. <?xml version="1.0" encoding="UTF-8"?>
84. <beans xmlns="http://www.springframework.org/schema/beans"
85.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
86.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
88.     <bean id="peopleBean" >
90.     </bean>
92. </beans><constructor-arg name="" ref=""></constructor-arg>
93.     </bean>    <bean id="" >
95. <?xml version="1.0" encoding="UTF-8"?>
96. <beans xmlns="http://www.springframework.org/schema/beans"
97.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
98.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
100.     <bean id="peopleBean" >
102.     </bean>
104. </beans><constructor-arg name="" value=""></constructor-arg>
106. <?xml version="1.0" encoding="UTF-8"?>
107. <beans xmlns="http://www.springframework.org/schema/beans"
108.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
109.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
111.     <bean id="peopleBean" >
113.     </bean>
115. </beans><constructor-arg name="" ref=""></constructor-arg>
116.     </bean><?xml version="1.0" encoding="UTF-8"?>
117. <beans xmlns="http://www.springframework.org/schema/beans"
118.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
119.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
121.     <bean id="peopleBean" >
123.     </bean>
125. </beans>

复制代码

1. package com.rainbowsea.bean;import java.util.Map;public class People { private Map names;    public void setNames(Map names) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.names = names;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"names=" + names +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

复制代码

运行测试：

1. package com.rainbowsea.test;
3. import com.rainbowsea.bean.People;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(peopleBean);
72.     }
73. }

复制代码

2.8.2 set 注入的Map集合的复杂类型

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>    <bean id="" >
26. <?xml version="1.0" encoding="UTF-8"?>
27. <beans xmlns="http://www.springframework.org/schema/beans"
28.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
29.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
31.     <bean id="peopleBean" >
33.     </bean>
35. </beans><constructor-arg name="" value=""></constructor-arg>
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans><constructor-arg name="" ref=""></constructor-arg>
47.     </bean>    <bean id="" >
49. <?xml version="1.0" encoding="UTF-8"?>
50. <beans xmlns="http://www.springframework.org/schema/beans"
51.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
52.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
54.     <bean id="peopleBean" >
56.     </bean>
58. </beans><constructor-arg name="" value=""></constructor-arg>
60. <?xml version="1.0" encoding="UTF-8"?>
61. <beans xmlns="http://www.springframework.org/schema/beans"
62.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
63.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
65.     <bean id="peopleBean" >
67.     </bean>
69. </beans><constructor-arg name="" ref=""></constructor-arg>
70.     </bean>    <bean id="" >
72. <?xml version="1.0" encoding="UTF-8"?>
73. <beans xmlns="http://www.springframework.org/schema/beans"
74.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
75.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
77.     <bean id="peopleBean" >
79.     </bean>
81. </beans><constructor-arg name="" value=""></constructor-arg>
83. <?xml version="1.0" encoding="UTF-8"?>
84. <beans xmlns="http://www.springframework.org/schema/beans"
85.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
86.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
88.     <bean id="peopleBean" >
90.     </bean>
92. </beans><constructor-arg name="" ref=""></constructor-arg>
93.     </bean>    <bean id="" >
95. <?xml version="1.0" encoding="UTF-8"?>
96. <beans xmlns="http://www.springframework.org/schema/beans"
97.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
98.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
100.     <bean id="peopleBean" >
102.     </bean>
104. </beans><constructor-arg name="" value=""></constructor-arg>
106. <?xml version="1.0" encoding="UTF-8"?>
107. <beans xmlns="http://www.springframework.org/schema/beans"
108.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
109.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
111.     <bean id="peopleBean" >
113.     </bean>
115. </beans><constructor-arg name="" ref=""></constructor-arg>
116.     </bean>    <bean id="" >
118. <?xml version="1.0" encoding="UTF-8"?>
119. <beans xmlns="http://www.springframework.org/schema/beans"
120.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
121.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
123.     <bean id="peopleBean" >
125.     </bean>
127. </beans><constructor-arg name="" value=""></constructor-arg>
129. <?xml version="1.0" encoding="UTF-8"?>
130. <beans xmlns="http://www.springframework.org/schema/beans"
131.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
132.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
134.     <bean id="peopleBean" >
136.     </bean>
138. </beans><constructor-arg name="" ref=""></constructor-arg>
139.     </bean>

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1. package com.rainbowsea.bean;public class User {    private String name;    public void setName(String name) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.name = name;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "User{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"name='" + name + '\'' +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

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1. package com.rainbowsea.bean;import java.util.Map;public class People { private Map user; // set 注入，必须要有 set 方法    public void setUser(Map user) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.user = user;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"user=" + user +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

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运行测试：

1. package com.rainbowsea.test;
3. import com.rainbowsea.bean.People;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(peopleBean);
72.     }
73. }

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2.9 set注入Properties 特殊的 Map 集合

java.util.Properties继承java.util.Hashtable，所以Properties也是一个Map集合。
但是虽然 Properties 是一个 Map 集合，但是在 Spring当中，是无法使用  标签进行一个 set 注入的。
对于 properties 集合类型的，set 注入使用的是 p标签

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="testDateBean" >
30. <?xml version="1.0" encoding="UTF-8"?>
31. <beans xmlns="http://www.springframework.org/schema/beans"
32.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
33.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
35.     <bean id="peopleBean" >
37.     </bean>
39. </beans><property name="date" value="2023 -05-6"></property>
40.     </bean>
41. </beans>com.mysql.cj.jdbc.Driver<?xml version="1.0" encoding="UTF-8"?>
42. <beans xmlns="http://www.springframework.org/schema/beans"
43.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
44.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
46.     <bean id="testDateBean" >
47. <?xml version="1.0" encoding="UTF-8"?>
48. <beans xmlns="http://www.springframework.org/schema/beans"
49.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
50.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
52.     <bean id="peopleBean" >
54.     </bean>
56. </beans><property name="date" value="2023 -05-6"></property>
57.     </bean>
58. </beans>jdbc:mysql//localhost:3306/spring<?xml version="1.0" encoding="UTF-8"?>
59. <beans xmlns="http://www.springframework.org/schema/beans"
60.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
61.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
63.     <bean id="testDateBean" >
64. <?xml version="1.0" encoding="UTF-8"?>
65. <beans xmlns="http://www.springframework.org/schema/beans"
66.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
67.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
69.     <bean id="peopleBean" >
71.     </bean>
73. </beans><property name="date" value="2023 -05-6"></property>
74.     </bean>
75. </beans>root<?xml version="1.0" encoding="UTF-8"?>
76. <beans xmlns="http://www.springframework.org/schema/beans"
77.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
78.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
80.     <bean id="testDateBean" >
81. <?xml version="1.0" encoding="UTF-8"?>
82. <beans xmlns="http://www.springframework.org/schema/beans"
83.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
84.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
86.     <bean id="peopleBean" >
88.     </bean>
90. </beans><property name="date" value="2023 -05-6"></property>
91.     </bean>
92. </beans>123456    <bean id="" >
94. <?xml version="1.0" encoding="UTF-8"?>
95. <beans xmlns="http://www.springframework.org/schema/beans"
96.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
97.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
99.     <bean id="peopleBean" >
101.     </bean>
103. </beans><constructor-arg name="" value=""></constructor-arg>
105. <?xml version="1.0" encoding="UTF-8"?>
106. <beans xmlns="http://www.springframework.org/schema/beans"
107.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
108.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
110.     <bean id="peopleBean" >
112.     </bean>
114. </beans><constructor-arg name="" ref=""></constructor-arg>
115.     </bean>

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1. package com.rainbowsea.bean;import java.util.Properties;public class People {    private Properties properties;    // set 注入必须提供 set 方法    public void setProperties(Properties properties) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.properties = properties;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"properties=" + properties +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

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运行测试：

1. package com.rainbowsea.test;
3. import com.rainbowsea.bean.People;
4. import org.junit.Test;
5. import org.springframework.context.ApplicationContext;
6. import org.springframework.context.support.ClassPathXmlApplicationContext;
8. public class SpringStructure {
10.     @Test
11.     public void test() {
12. <?xml version="1.0" encoding="UTF-8"?>
13. <beans xmlns="http://www.springframework.org/schema/beans"
14.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
15.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
17.     <bean id="peopleBean" >
19.     </bean>
21. </beans>// 获取到对应的 spring6当中的xml的，容器对象
22. <?xml version="1.0" encoding="UTF-8"?>
23. <beans xmlns="http://www.springframework.org/schema/beans"
24.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
25.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
27.     <bean id="peopleBean" >
29.     </bean>
31. </beans>// 面向接口编程，左边为接口，
32. <?xml version="1.0" encoding="UTF-8"?>
33. <beans xmlns="http://www.springframework.org/schema/beans"
34.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
35.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
37.     <bean id="peopleBean" >
39.     </bean>
41. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans>// 通过 id 获取到对应的类/class
52. <?xml version="1.0" encoding="UTF-8"?>
53. <beans xmlns="http://www.springframework.org/schema/beans"
54.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
55.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
57.     <bean id="peopleBean" >
59.     </bean>
61. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);
62. <?xml version="1.0" encoding="UTF-8"?>
63. <beans xmlns="http://www.springframework.org/schema/beans"
64.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
65.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
67.     <bean id="peopleBean" >
69.     </bean>
71. </beans>System.out.println(peopleBean);
72.     }
73. }

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2.10 set 注入 null 和空字符串的方式

2.10.1  set 注入 null 值的方式

当我们想要对一个属性为一个 null 值的时候，我们应该怎么做呢？
有如下两种方式：
第一种方式：方式不给属性注入，属性的默认值就是为 null 的
测试：

1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>

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1. package com.rainbowsea.bean;import java.util.Properties;public class People {    private String name;    // set 注入必须提供 set 方法    public void setName(String name) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.name = name;    }    // 提供一个get 方法用于测试，是否为null的    public String getName() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return name;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="peopleBean" >
26.     </bean>
28. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
29. <beans xmlns="http://www.springframework.org/schema/beans"
30.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
31.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
33.     <bean id="testDateBean" >
34. <?xml version="1.0" encoding="UTF-8"?>
35. <beans xmlns="http://www.springframework.org/schema/beans"
36.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
37.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
39.     <bean id="peopleBean" >
41.     </bean>
43. </beans><property name="date" value="2023 -05-6"></property>
44.     </bean>
45. </beans>"name='" + name + '\'' +<?xml version="1.0" encoding="UTF-8"?>
46. <beans xmlns="http://www.springframework.org/schema/beans"
47.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
48.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
50.     <bean id="testDateBean" >
51. <?xml version="1.0" encoding="UTF-8"?>
52. <beans xmlns="http://www.springframework.org/schema/beans"
53.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
54.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
56.     <bean id="peopleBean" >
58.     </bean>
60. </beans><property name="date" value="2023 -05-6"></property>
61.     </bean>
62. </beans>'}';    }}

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运行测试

1. package com.rainbowsea.test;import com.rainbowsea.bean.People;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class SpringStructure {    @Test    public void test() {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>// 获取到对应的 spring6当中的xml的，容器对象<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>// 面向接口编程，左边为接口，<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="peopleBean" >
26.     </bean>
28. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");<?xml version="1.0" encoding="UTF-8"?>
29. <beans xmlns="http://www.springframework.org/schema/beans"
30.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
31.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
33.     <bean id="peopleBean" >
35.     </bean>
37. </beans>// 通过 id 获取到对应的类/class<?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);<?xml version="1.0" encoding="UTF-8"?>
47. <beans xmlns="http://www.springframework.org/schema/beans"
48.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
49.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
51.     <bean id="peopleBean" >
53.     </bean>
55. </beans>// 将小写字母转换为大写字母，如果name为空报 null 异常测试：<?xml version="1.0" encoding="UTF-8"?>
56. <beans xmlns="http://www.springframework.org/schema/beans"
57.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
58.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
60.     <bean id="peopleBean" >
62.     </bean>
64. </beans>System.out.println(peopleBean.getName().toUpperCase());    }}

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方式二：使用  的标签进行一个属性 set 注入赋值为 null 的操作

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="testDateBean" >
30. <?xml version="1.0" encoding="UTF-8"?>
31. <beans xmlns="http://www.springframework.org/schema/beans"
32.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
33.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
35.     <bean id="peopleBean" >
37.     </bean>
39. </beans><property name="date" value="2023 -05-6"></property>
40.     </bean>
41. </beans>

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运行测试：

1. package com.rainbowsea.test;import com.rainbowsea.bean.People;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class SpringStructure {    @Test    public void test() {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>// 获取到对应的 spring6当中的xml的，容器对象<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>// 面向接口编程，左边为接口，<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="peopleBean" >
26.     </bean>
28. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");<?xml version="1.0" encoding="UTF-8"?>
29. <beans xmlns="http://www.springframework.org/schema/beans"
30.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
31.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
33.     <bean id="peopleBean" >
35.     </bean>
37. </beans>// 通过 id 获取到对应的类/class<?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans>People peopleBean = applicationContext.getBean("peopleBean", People.class);<?xml version="1.0" encoding="UTF-8"?>
47. <beans xmlns="http://www.springframework.org/schema/beans"
48.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
49.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
51.     <bean id="peopleBean" >
53.     </bean>
55. </beans>// 将小写字母转换为大写字母，如果name为空报 null 异常测试：<?xml version="1.0" encoding="UTF-8"?>
56. <beans xmlns="http://www.springframework.org/schema/beans"
57.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
58.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
60.     <bean id="peopleBean" >
62.     </bean>
64. </beans>System.out.println(peopleBean.getName().toUpperCase());    }}

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注意点：就是如果我们将 value = null ，set 注入的话，并不是将 value 的属性值，赋值为了null，而是赋值为了一个 null 的字符串而已。

1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
7. <?xml version="1.0" encoding="UTF-8"?>
8. <beans xmlns="http://www.springframework.org/schema/beans"
9.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
10.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
12.     <bean id="peopleBean" >
14.     </bean>
16. </beans><constructor-arg index="0" value=""></constructor-arg>
18. <?xml version="1.0" encoding="UTF-8"?>
19. <beans xmlns="http://www.springframework.org/schema/beans"
20.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
21.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
23.     <bean id="peopleBean" >
25.     </bean>
27. </beans><constructor-arg index="1" ref=""></constructor-arg>
28.     </bean>
29. </beans>

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2.10.2  set 注入空字符串值的方式

同样的，如果我们想要将一个属性的值，赋值为 空字符串 该怎么做呢？
**方式一：我们可以 value="" 的方式进行一个空字符串的赋值 **

1. package com.rainbowsea.bean;public class People {    private String name;    // set 注入必须提供 set 方法    public void setName(String name) {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>this.name = name;    }    @Override    public String toString() {<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>return "People{" +<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="testDateBean" >
25. <?xml version="1.0" encoding="UTF-8"?>
26. <beans xmlns="http://www.springframework.org/schema/beans"
27.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
28.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
30.     <bean id="peopleBean" >
32.     </bean>
34. </beans><property name="date" value="2023 -05-6"></property>
35.     </bean>
36. </beans>"name='" + name + '\'' +<?xml version="1.0" encoding="UTF-8"?>
37. <beans xmlns="http://www.springframework.org/schema/beans"
38.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
39.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
41.     <bean id="testDateBean" >
42. <?xml version="1.0" encoding="UTF-8"?>
43. <beans xmlns="http://www.springframework.org/schema/beans"
44.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
45.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
47.     <bean id="peopleBean" >
49.     </bean>
51. </beans><property name="date" value="2023 -05-6"></property>
52.     </bean>
53. </beans>'}';    }}

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1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="testDateBean" >
7. <?xml version="1.0" encoding="UTF-8"?>
8. <beans xmlns="http://www.springframework.org/schema/beans"
9.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
10.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
12.     <bean id="peopleBean" >
14.     </bean>
16. </beans><property name="date" value="2023 -05-6"></property>
17.     </bean>
18. </beans>

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方式二:  使    进行一个空字符串的 set 注入

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean><?xml version="1.0" encoding="UTF-8"?>
25. <beans xmlns="http://www.springframework.org/schema/beans"
26.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
27.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
29.     <bean id="peopleBean" >
31.     </bean>
33. </beans>   

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2.11 set 注入的属性值当中含有特殊符号，怎么处理

注意： 当我们在 xml 文件中出现了，特殊的字符串的时候，不然不进行一个特殊的处理的话，是会报错的。
XML 中有 5 个特殊字符，分别是：、'、"、& 。以上这 5 个特殊符号在 xml 中会被特殊对待，会被当做xml语法的一部分进行解析，如果这些特殊符号直接出现注入的字符串当中，会报错的。具体体现如下：

The value of attribute "value" associated with an element type "property" must not contain the '[/code]具体如下图所示：

第四步：在spring中配置使用jdbc.properties文件。
格式如下：

1. <?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
7.     <bean id="peopleBean" >
9.         <property name="name" value="2 < 3"></property>
10.     </bean>
11. </beans>

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具体的如下图所示：

1.     <bean id="" >
3. <?xml version="1.0" encoding="UTF-8"?>
4. <beans xmlns="http://www.springframework.org/schema/beans"
5.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
8.     <bean id="peopleBean" >
10.     </bean>
12. </beans><constructor-arg name="" value=""></constructor-arg>
14. <?xml version="1.0" encoding="UTF-8"?>
15. <beans xmlns="http://www.springframework.org/schema/beans"
16.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
17.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
19.     <bean id="peopleBean" >
21.     </bean>
23. </beans><constructor-arg name="" ref=""></constructor-arg>
24.     </bean>    <bean id="" >
26. <?xml version="1.0" encoding="UTF-8"?>
27. <beans xmlns="http://www.springframework.org/schema/beans"
28.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
29.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
31.     <bean id="peopleBean" >
33.     </bean>
35. </beans><constructor-arg name="" value=""></constructor-arg>
37. <?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans><constructor-arg name="" ref=""></constructor-arg>
47.     </bean><?xml version="1.0" encoding="UTF-8"?>
48. <beans xmlns="http://www.springframework.org/schema/beans"
49.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
50.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
52.     <bean id="peopleBean" >
54.     </bean>
56. </beans>

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测试程序：

1. package com.rainbowsea.test;import com.rainbowsea.bean.MyDataSource;import org.junit.Test;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class SpringStructure {    @Test    public void test() {<?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
6.     <bean id="peopleBean" >
8.     </bean>
10. </beans>// 获取到对应的 spring6当中的xml的，容器对象<?xml version="1.0" encoding="UTF-8"?>
11. <beans xmlns="http://www.springframework.org/schema/beans"
12.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
15.     <bean id="peopleBean" >
17.     </bean>
19. </beans>// 面向接口编程，左边为接口，<?xml version="1.0" encoding="UTF-8"?>
20. <beans xmlns="http://www.springframework.org/schema/beans"
21.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
22.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
24.     <bean id="peopleBean" >
26.     </bean>
28. </beans>ApplicationContext applicationContext = new ClassPathXmlApplicationContext("spring-sets.xml");<?xml version="1.0" encoding="UTF-8"?>
29. <beans xmlns="http://www.springframework.org/schema/beans"
30.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
31.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
33.     <bean id="peopleBean" >
35.     </bean>
37. </beans>// 通过 id 获取到对应的类/class<?xml version="1.0" encoding="UTF-8"?>
38. <beans xmlns="http://www.springframework.org/schema/beans"
39.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
42.     <bean id="peopleBean" >
44.     </bean>
46. </beans>MyDataSource ds = applicationContext.getBean("ds", MyDataSource.class);<?xml version="1.0" encoding="UTF-8"?>
47. <beans xmlns="http://www.springframework.org/schema/beans"
48.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
49.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">
51.     <bean id="peopleBean" >
53.     </bean>
55. </beans>System.out.println(ds);    }}

复制代码

5. 总结：

• 依赖注入：
  
  
  
  • 依赖指的是对象和对象 之间的关联关系。
    
  • 注入指的是一种数据传递行为，通过注入行为来让对象和对象产生关系。
    依赖注入常见的实现方式包括两种：
    
  • 第一种：set注入 : set 注入必须实现了其中类的 set () 方法不然，是实现 set 注入的。因为set 注入的底层调用的是 set () 方法
    
  • 第二种: 构造注入： 构造注入必须实现了对应参数的构造方法，不然是无法实现构造注入的。因为构造注入的底层调用的是 对应的构造方法。
    
  
  
• 使用其中 set 注入的各种应用场景：
  
  
  
  • 简单类型的set 注入使用  value  属性操作
    
  • 复杂类型的 set 注入使用 ref 属性进行一个赋值操作
    
  
  
• set 注入的各种类型的格式处理：
  
  
  
  • 数组类型
    
  • 集合类型： Set，List,Map, Properties 集合
    
  
  
• set 注入当中 如何实现 null 指的赋值，以及空字符串 的赋值
  
• 在 xml 当中，五种特殊的字符串的处理的方式：XML 中有 5 个特殊字符，分别是：、'、"、& 。以上这 5 个特殊符号在 xml 中会被特殊对待，会被当做xml语法的一部分进行解析，如果这些特殊符号直接出现注入的字符串当中，会报错的。
  
• 命名空间上的使用：简化配置信息： p命名空间，c命名空间，util 命名空间。
  
  
  
  • p命名空间底层调用的还是  set () 方法
    
  • c命名空间底层调用的是 构造方法
    
  • util 命名空间进行一个配置信息的复用
    
  
  
• Spring 当中的 xml 读取到外部的 properties 配置文件的信息的操作。
  

6. 最后:

“在这个最后的篇章中，我要表达我对每一位读者的感激之情。你们的关注和回复是我创作的动力源泉，我从你们身上吸取了无尽的灵感与勇气。我会将你们的鼓励留在心底，继续在其他的领域奋斗。感谢你们，我们总会在某个时刻再次相遇。”

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