12、Spring之基于xml的AOP

阅读本文前，建议先阅读Spring之基于注解的AOP

12.1、环境搭建

创建名为spring_aop_xml的新module，过程参考9.1节

12.1.1、配置打包方式和依赖

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.        xmlns:context="http://www.springframework.org/schema/context"
7.        xmlns:aop="http://www.springframework.org/schema/aop"
8.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
10.    
11.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
13. </beans> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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.        xmlns:context="http://www.springframework.org/schema/context"
18.        xmlns:aop="http://www.springframework.org/schema/aop"
19.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
21.    
22.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
24. </beans> xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
25.     <modelVersion>4.0.0</modelVersion>
27.     <groupId>org.rain</groupId>
28.     <artifactId>spring_aop_xml</artifactId>
29.     <version>1.0-SNAPSHOT</version>
30.     <packaging>jar</packaging>
32.     <dependencies>
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.        xmlns:context="http://www.springframework.org/schema/context"
37.        xmlns:aop="http://www.springframework.org/schema/aop"
38.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
40.    
41.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
43. </beans>
44. <?xml version="1.0" encoding="UTF-8"?>
45. <beans xmlns="http://www.springframework.org/schema/beans"
46.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
47.        xmlns:context="http://www.springframework.org/schema/context"
48.        xmlns:aop="http://www.springframework.org/schema/aop"
49.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
51.    
52.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
54. </beans><dependency>
55. <?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.        xmlns:context="http://www.springframework.org/schema/context"
59.        xmlns:aop="http://www.springframework.org/schema/aop"
60.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
62.    
63.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
65. </beans>    <groupId>org.springframework</groupId>
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.        xmlns:context="http://www.springframework.org/schema/context"
70.        xmlns:aop="http://www.springframework.org/schema/aop"
71.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
73.    
74.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
76. </beans>    <artifactId>spring-context</artifactId>
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.        xmlns:context="http://www.springframework.org/schema/context"
81.        xmlns:aop="http://www.springframework.org/schema/aop"
82.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
84.    
85.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
87. </beans>    <version>5.3.1</version>
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.        xmlns:context="http://www.springframework.org/schema/context"
92.        xmlns:aop="http://www.springframework.org/schema/aop"
93.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
95.    
96.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
98. </beans></dependency>
100. <?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.        xmlns:context="http://www.springframework.org/schema/context"
104.        xmlns:aop="http://www.springframework.org/schema/aop"
105.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
107.    
108.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
110. </beans>
111. <?xml version="1.0" encoding="UTF-8"?>
112. <beans xmlns="http://www.springframework.org/schema/beans"
113.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
114.        xmlns:context="http://www.springframework.org/schema/context"
115.        xmlns:aop="http://www.springframework.org/schema/aop"
116.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
118.    
119.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
121. </beans><dependency>
122. <?xml version="1.0" encoding="UTF-8"?>
123. <beans xmlns="http://www.springframework.org/schema/beans"
124.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
125.        xmlns:context="http://www.springframework.org/schema/context"
126.        xmlns:aop="http://www.springframework.org/schema/aop"
127.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
129.    
130.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
132. </beans>    <groupId>org.springframework</groupId>
133. <?xml version="1.0" encoding="UTF-8"?>
134. <beans xmlns="http://www.springframework.org/schema/beans"
135.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
136.        xmlns:context="http://www.springframework.org/schema/context"
137.        xmlns:aop="http://www.springframework.org/schema/aop"
138.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
140.    
141.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
143. </beans>    <artifactId>spring-aspects</artifactId>
144. <?xml version="1.0" encoding="UTF-8"?>
145. <beans xmlns="http://www.springframework.org/schema/beans"
146.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
147.        xmlns:context="http://www.springframework.org/schema/context"
148.        xmlns:aop="http://www.springframework.org/schema/aop"
149.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
151.    
152.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
154. </beans>    <version>5.3.1</version>
155. <?xml version="1.0" encoding="UTF-8"?>
156. <beans xmlns="http://www.springframework.org/schema/beans"
157.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
158.        xmlns:context="http://www.springframework.org/schema/context"
159.        xmlns:aop="http://www.springframework.org/schema/aop"
160.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
162.    
163.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
165. </beans></dependency>
167. <?xml version="1.0" encoding="UTF-8"?>
168. <beans xmlns="http://www.springframework.org/schema/beans"
169.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
170.        xmlns:context="http://www.springframework.org/schema/context"
171.        xmlns:aop="http://www.springframework.org/schema/aop"
172.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
174.    
175.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
177. </beans>
178. <?xml version="1.0" encoding="UTF-8"?>
179. <beans xmlns="http://www.springframework.org/schema/beans"
180.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
181.        xmlns:context="http://www.springframework.org/schema/context"
182.        xmlns:aop="http://www.springframework.org/schema/aop"
183.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
185.    
186.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
188. </beans><dependency>
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.        xmlns:context="http://www.springframework.org/schema/context"
193.        xmlns:aop="http://www.springframework.org/schema/aop"
194.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
196.    
197.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
199. </beans>    <groupId>junit</groupId>
200. <?xml version="1.0" encoding="UTF-8"?>
201. <beans xmlns="http://www.springframework.org/schema/beans"
202.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
203.        xmlns:context="http://www.springframework.org/schema/context"
204.        xmlns:aop="http://www.springframework.org/schema/aop"
205.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
207.    
208.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
210. </beans>    <artifactId>junit</artifactId>
211. <?xml version="1.0" encoding="UTF-8"?>
212. <beans xmlns="http://www.springframework.org/schema/beans"
213.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
214.        xmlns:context="http://www.springframework.org/schema/context"
215.        xmlns:aop="http://www.springframework.org/schema/aop"
216.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
218.    
219.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
221. </beans>    <version>4.12</version>
222. <?xml version="1.0" encoding="UTF-8"?>
223. <beans xmlns="http://www.springframework.org/schema/beans"
224.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
225.        xmlns:context="http://www.springframework.org/schema/context"
226.        xmlns:aop="http://www.springframework.org/schema/aop"
227.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
229.    
230.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
232. </beans>    <scope>test</scope>
233. <?xml version="1.0" encoding="UTF-8"?>
234. <beans xmlns="http://www.springframework.org/schema/beans"
235.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
236.        xmlns:context="http://www.springframework.org/schema/context"
237.        xmlns:aop="http://www.springframework.org/schema/aop"
238.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
240.    
241.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
243. </beans></dependency>
244.     </dependencies>
246. </project>

复制代码

12.1.2、创建Calculator接口及实现类

1. package org.rain.spring.aop.xml;
3. /**
4. * @author liaojy
5. * @date 2023/8/18 - 8:09
6. */
7. public interface Calculator {
9.     int add(int i, int j);
10.     int sub(int i, int j);
11.     int mul(int i, int j);
12.     int div(int i, int j);
14. }

复制代码

1. package org.rain.spring.aop.xml;
3. import org.springframework.stereotype.Component;
5. /**
6. * @author liaojy
7. * @date 2023/8/18 - 8:11
8. */
9. // @Component注解：保证这个目标类能够放入IOC容器
10. @Component
11. public class CalculatorImpl implements Calculator {
12.     public int add(int i, int j) {
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.        xmlns:context="http://www.springframework.org/schema/context"
18.        xmlns:aop="http://www.springframework.org/schema/aop"
19.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
21.    
22.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
24. </beans>int result = i + j;
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.        xmlns:context="http://www.springframework.org/schema/context"
29.        xmlns:aop="http://www.springframework.org/schema/aop"
30.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
32.    
33.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
35. </beans>System.out.println("方法内部 result = " + result);
36. <?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.        xmlns:context="http://www.springframework.org/schema/context"
40.        xmlns:aop="http://www.springframework.org/schema/aop"
41.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
43.    
44.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
46. </beans>return result;
48.     }
50.     public int sub(int i, int j) {
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.        xmlns:context="http://www.springframework.org/schema/context"
56.        xmlns:aop="http://www.springframework.org/schema/aop"
57.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
59.    
60.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
62. </beans>int result = i - j;
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.        xmlns:context="http://www.springframework.org/schema/context"
67.        xmlns:aop="http://www.springframework.org/schema/aop"
68.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
70.    
71.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
73. </beans>System.out.println("方法内部 result = " + result);
74. <?xml version="1.0" encoding="UTF-8"?>
75. <beans xmlns="http://www.springframework.org/schema/beans"
76.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
77.        xmlns:context="http://www.springframework.org/schema/context"
78.        xmlns:aop="http://www.springframework.org/schema/aop"
79.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
81.    
82.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
84. </beans>return result;
86.     }
88.     public int mul(int i, int j) {
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.        xmlns:context="http://www.springframework.org/schema/context"
94.        xmlns:aop="http://www.springframework.org/schema/aop"
95.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
97.    
98.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
100. </beans>int result = i * j;
101. <?xml version="1.0" encoding="UTF-8"?>
102. <beans xmlns="http://www.springframework.org/schema/beans"
103.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
104.        xmlns:context="http://www.springframework.org/schema/context"
105.        xmlns:aop="http://www.springframework.org/schema/aop"
106.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
108.    
109.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
111. </beans>System.out.println("方法内部 result = " + result);
112. <?xml version="1.0" encoding="UTF-8"?>
113. <beans xmlns="http://www.springframework.org/schema/beans"
114.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
115.        xmlns:context="http://www.springframework.org/schema/context"
116.        xmlns:aop="http://www.springframework.org/schema/aop"
117.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
119.    
120.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
122. </beans>return result;
124.     }
126.     public int div(int i, int j) {
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.        xmlns:context="http://www.springframework.org/schema/context"
132.        xmlns:aop="http://www.springframework.org/schema/aop"
133.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
135.    
136.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
138. </beans>int result = i / j;
139. <?xml version="1.0" encoding="UTF-8"?>
140. <beans xmlns="http://www.springframework.org/schema/beans"
141.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
142.        xmlns:context="http://www.springframework.org/schema/context"
143.        xmlns:aop="http://www.springframework.org/schema/aop"
144.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
146.    
147.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
149. </beans>System.out.println("方法内部 result = " + result);
150. <?xml version="1.0" encoding="UTF-8"?>
151. <beans xmlns="http://www.springframework.org/schema/beans"
152.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
153.        xmlns:context="http://www.springframework.org/schema/context"
154.        xmlns:aop="http://www.springframework.org/schema/aop"
155.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
157.    
158.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
160. </beans>return result;
162.     }
163. }

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12.1.3、创建切面类LoggerAspect

1. package org.rain.spring.aop.xml;
3. import org.springframework.stereotype.Component;
5. /**
6. * @author liaojy
7. * @date 2023/8/18 - 8:15
8. */
9. // @Component注解：保证这个目标类能够放入IOC容器
10. @Component
11. public class LoggerAspect {
12. }

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12.1.4、创建spring配置文件

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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>

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12.2、前置通知的使用

12.2.1、基本示例

12.2.1.1、定义前置通知的功能

1.     public void beforeMethod(){<?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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>System.out.println("LoggerAspect，前置通知");    }

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12.2.1.2、配置前置通知到切面

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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
35.        xmlns:aop="http://www.springframework.org/schema/aop"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
38.    
39.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
41. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
45.        xmlns:aop="http://www.springframework.org/schema/aop"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
48.    
49.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
51. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
55.        xmlns:aop="http://www.springframework.org/schema/aop"
56.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
58.    
59.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
61. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
65.        xmlns:aop="http://www.springframework.org/schema/aop"
66.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
68.    
69.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
71. </beans>

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12.2.1.3、测试使用效果

由控制台日志可知，切面类的前置通知（方法），通过切入点表达式，作用到了目标方法的连接点上

1. package org.rain.spring.aop.test;import org.junit.Test;import org.rain.spring.aop.xml.Calculator;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;/** * @author liaojy * @date 2023/8/18 - 19:07 */public class AOPTest {    @Test    public void testAOPByXML(){<?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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>ApplicationContext ioc = new ClassPathXmlApplicationContext("spring-aopByxml.xml");<?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans>// 注意：这里不能直接获取目标对象来使用；因为使用了AOP之后，IOC容器中就只有对应目标对象的代理对象；<?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>// 如果强行获取目标对象，则报错：NoSuchBeanDefinitionException<?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.        xmlns:context="http://www.springframework.org/schema/context"
35.        xmlns:aop="http://www.springframework.org/schema/aop"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
38.    
39.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
41. </beans>//Calculator calculator = ioc.getBean(CalculatorImpl.class);<?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.        xmlns:context="http://www.springframework.org/schema/context"
45.        xmlns:aop="http://www.springframework.org/schema/aop"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
48.    
49.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
51. </beans>// 虽然不知道代理对象的类名，但可以通过代理对象和目标对象共同实现的接口类型来从ioc容器中获取代理对象<?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.        xmlns:context="http://www.springframework.org/schema/context"
55.        xmlns:aop="http://www.springframework.org/schema/aop"
56.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
58.    
59.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
61. </beans>Calculator calculator = ioc.getBean(Calculator.class);<?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.        xmlns:context="http://www.springframework.org/schema/context"
65.        xmlns:aop="http://www.springframework.org/schema/aop"
66.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
68.    
69.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
71. </beans>// 只能通过代理对象来访问目标对象中的方法<?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.        xmlns:context="http://www.springframework.org/schema/context"
75.        xmlns:aop="http://www.springframework.org/schema/aop"
76.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
78.    
79.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
81. </beans>calculator.div(1,1);    }}

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12.2.2、高级示例

12.2.2.1、改进前置通知的功能

该示例中（前置）通知方法引入了连接点参数，通过连接点参数，可以动态获取（切入点表达式）对应的目标方法的名称和参数列表

1.     // joinPoint参数：可以获取（通过切入点表达式定位出的）连接点的相关信息    public void beforeMethod(JoinPoint joinPoint){<?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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>// 获取连接点所对应目标方法的名称<?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans>String methodName = joinPoint.getSignature().getName();<?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>// 获取连接点所对应目标方法的参数列表<?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.        xmlns:context="http://www.springframework.org/schema/context"
35.        xmlns:aop="http://www.springframework.org/schema/aop"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
38.    
39.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
41. </beans>Object[] args = joinPoint.getArgs();<?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.        xmlns:context="http://www.springframework.org/schema/context"
45.        xmlns:aop="http://www.springframework.org/schema/aop"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
48.    
49.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
51. </beans>System.out.println("LoggerAspect-->前置通知，方法名："+methodName+"，参数："+ Arrays.toString(args));    }

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12.2.2.2、测试使用效果


12.3、切入点表达式的复用

切入点表达的详细语法，请参考11.3.2节

12.3.1、配置公共的切入点表达式

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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans>

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12.3.2、使用公共的切入点表达式

1. [/code][size=5]12.4、其他通知的使用[/size]
3. [size=4]12.4.1、后置通知[/size]
5. [size=3]12.4.1.1、定义后置通知的功能[/size]
7. [img]https://img2023.cnblogs.com/blog/2052479/202308/2052479-20230818174707243-1104193875.png[/img]
8. [code]    public void afterMethod(JoinPoint joinPoint){<?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.        xmlns:context="http://www.springframework.org/schema/context"
12.        xmlns:aop="http://www.springframework.org/schema/aop"
13.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
15.    
16.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
18. </beans>String methodName = joinPoint.getSignature().getName();<?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.        xmlns:context="http://www.springframework.org/schema/context"
22.        xmlns:aop="http://www.springframework.org/schema/aop"
23.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
25.    
26.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
28. </beans>Object[] args = joinPoint.getArgs();<?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.        xmlns:context="http://www.springframework.org/schema/context"
32.        xmlns:aop="http://www.springframework.org/schema/aop"
33.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
35.    
36.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
38. </beans>System.out.println("LoggerAspect-->后置通知，方法名："+methodName+"，参数："+ Arrays.toString(args));    }

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12.4.1.2、配置后置通知到切面

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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>

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12.4.1.3、测试使用效果

由控制台日志可知，后置通知在目标对象方法的finally子句中执行（一般用于释放资源）

1.     @Test    public void testAOPByXML(){<?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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>ApplicationContext ioc = new ClassPathXmlApplicationContext("spring-aopByxml.xml");<?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans>// 虽然不知道代理对象的类名，但可以通过代理对象和目标对象共同实现的接口类型来从ioc容器中获取代理对象<?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>Calculator calculator = ioc.getBean(Calculator.class);<?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.        xmlns:context="http://www.springframework.org/schema/context"
35.        xmlns:aop="http://www.springframework.org/schema/aop"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
38.    
39.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
41. </beans>// 只能通过代理对象来访问目标对象中的方法<?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.        xmlns:context="http://www.springframework.org/schema/context"
45.        xmlns:aop="http://www.springframework.org/schema/aop"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
48.    
49.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
51. </beans>calculator.div(1,0);    }

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12.4.2、返回通知

12.4.2.1、定义返回通知的功能

1.     public void afterReturningMethod(JoinPoint joinPoint,Object result){<?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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>String methodName = joinPoint.getSignature().getName();<?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans>Object[] args = joinPoint.getArgs();<?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>System.out.println("LoggerAspect-->返回通知，方法名："+methodName+"，结果："+ result);    }

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12.4.2.2、配置返回通知到切面

1. [/code][size=3]12.4.2.3、测试使用效果[/size]
3. [img]https://img2023.cnblogs.com/blog/2052479/202308/2052479-20230818180426669-697920630.png[/img]
4. [indent]返回通知在目标对象方法的返回值之后执行
5. [/indent][code]    @Test    public void testAOPByXML(){<?xml version="1.0" encoding="UTF-8"?>
6. <beans xmlns="http://www.springframework.org/schema/beans"
7.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
8.        xmlns:context="http://www.springframework.org/schema/context"
9.        xmlns:aop="http://www.springframework.org/schema/aop"
10.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
12.    
13.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
15. </beans>ApplicationContext ioc = new ClassPathXmlApplicationContext("spring-aopByxml.xml");<?xml version="1.0" encoding="UTF-8"?>
16. <beans xmlns="http://www.springframework.org/schema/beans"
17.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
18.        xmlns:context="http://www.springframework.org/schema/context"
19.        xmlns:aop="http://www.springframework.org/schema/aop"
20.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
22.    
23.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
25. </beans>// 虽然不知道代理对象的类名，但可以通过代理对象和目标对象共同实现的接口类型来从ioc容器中获取代理对象<?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.        xmlns:context="http://www.springframework.org/schema/context"
29.        xmlns:aop="http://www.springframework.org/schema/aop"
30.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
32.    
33.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
35. </beans>Calculator calculator = ioc.getBean(Calculator.class);<?xml version="1.0" encoding="UTF-8"?>
36. <beans xmlns="http://www.springframework.org/schema/beans"
37.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
38.        xmlns:context="http://www.springframework.org/schema/context"
39.        xmlns:aop="http://www.springframework.org/schema/aop"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
42.    
43.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
45. </beans>// 只能通过代理对象来访问目标对象中的方法<?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.        xmlns:context="http://www.springframework.org/schema/context"
49.        xmlns:aop="http://www.springframework.org/schema/aop"
50.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
52.    
53.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
55. </beans>calculator.div(1,1);    }

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12.4.3、异常通知

12.4.3.1、定义异常通知的功能

1.     public void afterThrowingMethod(JoinPoint joinPoint,Exception ex){<?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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>String methodName = joinPoint.getSignature().getName();<?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans>Object[] args = joinPoint.getArgs();<?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>System.out.println("LoggerAspect-->异常通知，方法名："+methodName+"，异常："+ ex);    }

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12.4.3.2、配置异常通知到切面

1. [/code][size=3]12.4.3.3、测试使用效果[/size]
3. [img]https://img2023.cnblogs.com/blog/2052479/202308/2052479-20230818181316015-2146504502.png[/img]
4. [indent]由控制台日志可知，异常通知在目标对象方法的catch子句中执行
5. [/indent][code]    @Test    public void testAOPByXML(){<?xml version="1.0" encoding="UTF-8"?>
6. <beans xmlns="http://www.springframework.org/schema/beans"
7.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
8.        xmlns:context="http://www.springframework.org/schema/context"
9.        xmlns:aop="http://www.springframework.org/schema/aop"
10.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
12.    
13.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
15. </beans>ApplicationContext ioc = new ClassPathXmlApplicationContext("spring-aopByxml.xml");<?xml version="1.0" encoding="UTF-8"?>
16. <beans xmlns="http://www.springframework.org/schema/beans"
17.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
18.        xmlns:context="http://www.springframework.org/schema/context"
19.        xmlns:aop="http://www.springframework.org/schema/aop"
20.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
22.    
23.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
25. </beans>// 虽然不知道代理对象的类名，但可以通过代理对象和目标对象共同实现的接口类型来从ioc容器中获取代理对象<?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.        xmlns:context="http://www.springframework.org/schema/context"
29.        xmlns:aop="http://www.springframework.org/schema/aop"
30.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
32.    
33.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
35. </beans>Calculator calculator = ioc.getBean(Calculator.class);<?xml version="1.0" encoding="UTF-8"?>
36. <beans xmlns="http://www.springframework.org/schema/beans"
37.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
38.        xmlns:context="http://www.springframework.org/schema/context"
39.        xmlns:aop="http://www.springframework.org/schema/aop"
40.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
42.    
43.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
45. </beans>// 只能通过代理对象来访问目标对象中的方法<?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.        xmlns:context="http://www.springframework.org/schema/context"
49.        xmlns:aop="http://www.springframework.org/schema/aop"
50.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
52.    
53.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
55. </beans>calculator.div(1,0);    }

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12.5、环绕通知

12.5.1、定义环绕通知的功能

环绕通知和动态代理的形式，非常相似

1.     /**     *  环绕通知（方法）使用的参数是ProceedingJoinPoint类型     *  环绕通知（方法）的返回值，必须和目标对象方法的返回值一致     */    public Object aroundMethod(ProceedingJoinPoint proceedingJoinPoint){<?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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>String methodName = proceedingJoinPoint.getSignature().getName();<?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans>Object[] args = proceedingJoinPoint.getArgs();<?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>Object result = null;<?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.        xmlns:context="http://www.springframework.org/schema/context"
35.        xmlns:aop="http://www.springframework.org/schema/aop"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
38.    
39.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
41. </beans>try {<?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.        xmlns:context="http://www.springframework.org/schema/context"
45.        xmlns:aop="http://www.springframework.org/schema/aop"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
48.    
49.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
51. </beans>    System.out.println("LoggerAspect-->环绕前置通知，方法名："+methodName+"，参数："+ Arrays.toString(args));<?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.        xmlns:context="http://www.springframework.org/schema/context"
55.        xmlns:aop="http://www.springframework.org/schema/aop"
56.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
58.    
59.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
61. </beans>    // 表示目标对象方法的执行<?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.        xmlns:context="http://www.springframework.org/schema/context"
65.        xmlns:aop="http://www.springframework.org/schema/aop"
66.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
68.    
69.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
71. </beans>    result = proceedingJoinPoint.proceed();<?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.        xmlns:context="http://www.springframework.org/schema/context"
75.        xmlns:aop="http://www.springframework.org/schema/aop"
76.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
78.    
79.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
81. </beans>    System.out.println("LoggerAspect-->环绕返回通知，方法名："+methodName+"，结果："+ result);<?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.        xmlns:context="http://www.springframework.org/schema/context"
85.        xmlns:aop="http://www.springframework.org/schema/aop"
86.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
88.    
89.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
91. </beans>} catch (Throwable throwable) {<?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.        xmlns:context="http://www.springframework.org/schema/context"
95.        xmlns:aop="http://www.springframework.org/schema/aop"
96.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
98.    
99.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
101. </beans>    throwable.printStackTrace();<?xml version="1.0" encoding="UTF-8"?>
102. <beans xmlns="http://www.springframework.org/schema/beans"
103.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
104.        xmlns:context="http://www.springframework.org/schema/context"
105.        xmlns:aop="http://www.springframework.org/schema/aop"
106.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
108.    
109.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
111. </beans>    System.out.println("LoggerAspect-->环绕异常通知，方法名："+methodName+"，异常："+ throwable);<?xml version="1.0" encoding="UTF-8"?>
112. <beans xmlns="http://www.springframework.org/schema/beans"
113.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
114.        xmlns:context="http://www.springframework.org/schema/context"
115.        xmlns:aop="http://www.springframework.org/schema/aop"
116.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
118.    
119.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
121. </beans>}finally {<?xml version="1.0" encoding="UTF-8"?>
122. <beans xmlns="http://www.springframework.org/schema/beans"
123.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
124.        xmlns:context="http://www.springframework.org/schema/context"
125.        xmlns:aop="http://www.springframework.org/schema/aop"
126.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
128.    
129.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
131. </beans>    System.out.println("LoggerAspect-->环绕后置通知，方法名："+methodName+"，参数："+ Arrays.toString(args));<?xml version="1.0" encoding="UTF-8"?>
132. <beans xmlns="http://www.springframework.org/schema/beans"
133.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
134.        xmlns:context="http://www.springframework.org/schema/context"
135.        xmlns:aop="http://www.springframework.org/schema/aop"
136.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
138.    
139.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
141. </beans>}<?xml version="1.0" encoding="UTF-8"?>
142. <beans xmlns="http://www.springframework.org/schema/beans"
143.        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
144.        xmlns:context="http://www.springframework.org/schema/context"
145.        xmlns:aop="http://www.springframework.org/schema/aop"
146.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
148.    
149.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
151. </beans>return result;    }

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12.5.2、配置环绕通知到切面

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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>

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12.5.3、测试使用效果

注意：因为环绕通知包括了其他四种通知，所以一般要么配置其他四种通知，要么只配置环绕通知；
本示例为了展示效果才同时配置

1.     @Test    public void testAOPByXML(){<?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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>ApplicationContext ioc = new ClassPathXmlApplicationContext("spring-aopByxml.xml");<?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans>// 虽然不知道代理对象的类名，但可以通过代理对象和目标对象共同实现的接口类型来从ioc容器中获取代理对象<?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>Calculator calculator = ioc.getBean(Calculator.class);<?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.        xmlns:context="http://www.springframework.org/schema/context"
35.        xmlns:aop="http://www.springframework.org/schema/aop"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
38.    
39.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
41. </beans>// 只能通过代理对象来访问目标对象中的方法<?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.        xmlns:context="http://www.springframework.org/schema/context"
45.        xmlns:aop="http://www.springframework.org/schema/aop"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
48.    
49.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
51. </beans>calculator.div(1,1);    }

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12.6、切面的优先级

12.6.1、创建其他切面类ValidateAspect

1. package org.rain.spring.aop.xml;
3. import org.springframework.stereotype.Component;
5. /**
6. * @author liaojy
7. * @date 2023/8/20 - 23:59
8. */
9. // @Component注解：保证这个目标类能够放入IOC容器
10. @Component
11. public class ValidateAspect {
12. }

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12.6.2、定义前置通知的功能

1.     public void beforeMethod(){<?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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>System.out.println("ValidateAspect-->前置通知");    }

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12.6.3、配置前置通知到切面

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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>   

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12.6.4、测试使用效果

由控制台日志可知，ValidateAspect切面的前置通知方法生效了，但执行顺序在LoggerAspect切面的前置通知方法的后面

1.     @Test    public void testAOPByXML(){<?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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans>ApplicationContext ioc = new ClassPathXmlApplicationContext("spring-aopByxml.xml");<?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans>// 虽然不知道代理对象的类名，但可以通过代理对象和目标对象共同实现的接口类型来从ioc容器中获取代理对象<?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans>Calculator calculator = ioc.getBean(Calculator.class);<?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.        xmlns:context="http://www.springframework.org/schema/context"
35.        xmlns:aop="http://www.springframework.org/schema/aop"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
38.    
39.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
41. </beans>// 只能通过代理对象来访问目标对象中的方法<?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.        xmlns:context="http://www.springframework.org/schema/context"
45.        xmlns:aop="http://www.springframework.org/schema/aop"
46.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
48.    
49.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
51. </beans>calculator.div(1,1);    }

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12.6.5、调整切面的优先级

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.        xmlns:context="http://www.springframework.org/schema/context"
5.        xmlns:aop="http://www.springframework.org/schema/aop"
6.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
8.    
9.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
11. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
15.        xmlns:aop="http://www.springframework.org/schema/aop"
16.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
18.    
19.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
21. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
25.        xmlns:aop="http://www.springframework.org/schema/aop"
26.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
28.    
29.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
31. </beans><?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.        xmlns:context="http://www.springframework.org/schema/context"
35.        xmlns:aop="http://www.springframework.org/schema/aop"
36.        xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd">
38.    
39.     <context:component-scan base-package="org.rain.spring.aop.xml"></context:component-scan>
41. </beans>   

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12.6.6、测试调整后的效果

由控制台日志可知，ValidateAspect切面的前置通知方法的执行顺序，在LoggerAspect切面的前置通知方法的前面

这是因为ValidateAspect切面的Order属性值已设为2023，要小于LoggerAspect切面所使用的默认值（Integer的最大值2147483647）

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