SpringMVC-06-SSM整合

1、环境要求

• IDEA
  
• MySQL 8.x
  
• Tomcat 9
  
• Maven 3.6
  

这只是大型软件要求，项目相关的jar包依赖将在Maven中配置。
项目前置技能：MySQL、Mybatis、Spring、JavaWeb、简单的前端知识。
2、数据库表

创建一个存放书籍数据的数据库表

1. CREATE DATABASE `ssmbuild`;
3. USE `ssmbuild`;
5. DROP TABLE IF EXISTS `books`;
7. CREATE TABLE `books`
8. (
9.     `bookID`     INT(10)      NOT NULL AUTO_INCREMENT COMMENT '书id',
10.     `bookName`   VARCHAR(100) NOT NULL COMMENT '书名',
11.     `bookCounts` INT(11)      NOT NULL COMMENT '数量',
12.     `detail`     VARCHAR(200) NOT NULL COMMENT '描述',
13.     KEY `bookID` (`bookID`)
14. ) ENGINE = INNODB
15.   DEFAULT CHARSET = utf8;
17. INSERT INTO `books`(`bookID`, `bookName`, `bookCounts`, `detail`)
18. VALUES (1, 'Java', 1, '从入门到放弃'),
19.        (2, 'MySQL', 10, '从删库到跑路'),
20.        (3, 'Linux', 5, '从进门到进牢');

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3、基本项目搭建

新建Maven项目，SpringMVC-06-SSM，添加web框架支持。
编写pom.xml，导入依赖

1. <dependencies>
2.    
3.     <dependency>
4.         <groupId>junit</groupId>
5.         <artifactId>junit</artifactId>
6.         <version>4.12</version>
7.     </dependency>
8.    
9.     <dependency>
10.         <groupId>org.projectlombok</groupId>
11.         <artifactId>lombok</artifactId>
12.         <version>1.18.32</version>
13.     </dependency>
14.    
15.     <dependency>
16.         <groupId>mysql</groupId>
17.         <artifactId>mysql-connector-java</artifactId>
18.         <version>8.0.16</version>
19.     </dependency>
20.    
21.     <dependency>
22.         <groupId>com.mchange</groupId>
23.         <artifactId>c3p0</artifactId>
24.         <version>0.9.5.2</version>
25.     </dependency>
26.    
27.     <dependency>
28.         <groupId>javax.servlet</groupId>
29.         <artifactId>servlet-api</artifactId>
30.         <version>2.5</version>
31.     </dependency>
32.     <dependency>
33.         <groupId>javax.servlet.jsp</groupId>
34.         <artifactId>jsp-api</artifactId>
35.         <version>2.1</version>
36.     </dependency>
37.     <dependency>
38.         <groupId>javax.servlet</groupId>
39.         <artifactId>jstl</artifactId>
40.         <version>1.2</version>
41.     </dependency>
42.    
43.     <dependency>
44.         <groupId>org.mybatis</groupId>
45.         <artifactId>mybatis</artifactId>
46.         <version>3.5.2</version>
47.     </dependency>
48.     <dependency>
49.         <groupId>org.mybatis</groupId>
50.         <artifactId>mybatis-spring</artifactId>
51.         <version>2.1.2</version>
52.     </dependency>
53.    
54.     <dependency>
55.         <groupId>org.springframework</groupId>
56.         <artifactId>spring-webmvc</artifactId>
57.         <version>5.2.12.RELEASE</version>
58.     </dependency>
59.     <dependency>
60.         <groupId>org.springframework</groupId>
61.         <artifactId>spring-jdbc</artifactId>
62.         <version>5.2.12.RELEASE</version>
63.     </dependency>
64.     <dependency>
65.         <groupId>org.aspectj</groupId>
66.         <artifactId>aspectjweaver</artifactId>
67.         <version>1.9.4</version>
68.     </dependency>
69. </dependencies>

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创建基本结构和配置框架

• com.moondream.controller 控制层
  
• com.moondream.service 服务层
  
• com.moondream.dao 持久层
  
• com.moondream.pojo 实体类
  
• web/WEB-INF/jsp 视图层
  
• resources
  
  
  
  • mybatis-config.xml      Mybatis核心配置文件
    1. <?xml version="1.0" encoding="UTF-8" ?>
    2. <!DOCTYPE configuration
    3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    4.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    5. <configuration>
    6.     <settings>
    7.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    8.     </settings>
    10.     <typeAliases>
    11.         <package name=""/>
    12.     </typeAliases>
    14.     <mappers>
    15.         <mapper resource=""/>
    16.     </mappers>
    17. </configuration>

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  • applicationContext.xml     Spring全局配置文件
    1. [/code]
    2. [/list]
    3. [/list]
    4. [size=5]4、Mybatis层(DAO层)[/size]
    6. 数据库配置文件 [b]db.properties[/b]
    7. [code]driver=com.mysql.cj.jdbc.Driver
    8. url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=false&characterEncoding=utf-8&serverTimezone=Asia/Shanghai
    9. user=root
    10. password=123456

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    编写数据库表对应的实体类，使用Lombok依赖减少代码量
    1. package com.moondream.pojo;
    3. import lombok.AllArgsConstructor;
    4. import lombok.Data;
    5. import lombok.NoArgsConstructor;
    7. @Data
    8. @AllArgsConstructor
    9. @NoArgsConstructor
    10. public class Book {
    11.     private Integer bookID;
    12.     private String bookName;
    13.     private Integer bookCounts;
    14.     private String detail;
    15. }

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    编写MyBatis的核心配置文件 mybatis-config.xml
    1. <?xml version="1.0" encoding="UTF-8" ?>
    2. <!DOCTYPE configuration
    3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    4.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    5. <configuration>
    6.     <settings>
    7.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    8.     </settings>
    10.     <typeAliases>
    11.         <package name=""/>
    12.     </typeAliases>
    14.     <mappers>
    15.         <mapper resource=""/>
    16.     </mappers>
    17. </configuration>

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    编写Mybatis的mapper映射文件 BookMapper.xml
    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <!DOCTYPE mapper
    3.         PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
    4.         "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    5. <mapper namespace="com.moondream.dao.BookMapper">
    7.    
    8.     <insert id="addBook">
    9.         insert into ssmbuild.books
    10.         values (#{bookID}, #{bookName}, #{bookCounts}, #{detail});
    11.     </insert>
    13.    
    14.     <delete id="deleteBookById">
    15.         delete
    16.         from ssmbuild.books
    17.         where bookID = #{bookID};
    18.     </delete>
    20.    
    21.     <update id="updateBook">
    22.         update ssmbuild.books
    23.         set bookName=#{bookName},
    24.             bookCounts=#{bookCounts},
    25.             detail=#{detail}
    26.         where bookID = #{bookID};
    27.     </update>
    29.    
    30.     <select id="queryAllBook" resultType="Book">
    31.         select *
    32.         from ssmbuild.books;
    33.     </select>
    35.    
    36.     <select id="queryBookById" resultType="Book">
    37.         select *
    38.         from ssmbuild.books
    39.         where bookID = #{bookID}
    40.     </select>
    42. </mapper>

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    编写mapper映射文件对应的接口，可以更方便的调用Mybatis
    1. package com.moondream.dao;
    3. import com.moondream.pojo.Book;
    5. import java.util.List;
    7. public interface BookMapper {
    8.     //增加一个Book
    9.     int addBook(Book book);
    11.     //根据id删除一个Book
    12.     Integer deleteBookById(Integer id);
    14.     //更新Book
    15.     Integer updateBook(Book Book);
    17.     //根据id查询,返回一个Book
    18.     Book queryBookById(Integer id);
    20.     //查询全部Book,返回list集合
    21.     List<Book> queryAllBook();
    22. }

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    编写 spring-dao.xml，把Mybatis整合进Spring
    1. <?xml version="1.0" encoding="UTF-8" ?>
    2. <!DOCTYPE configuration
    3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    4.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    5. <configuration>
    6.     <settings>
    7.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    8.     </settings>
    10.     <typeAliases>
    11.         <package name=""/>
    12.     </typeAliases>
    14.     <mappers>
    15.         <mapper resource=""/>
    16.     </mappers>
    17. </configuration><?xml version="1.0" encoding="UTF-8" ?>
    18. <!DOCTYPE configuration
    19.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    20.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    21. <configuration>
    22.     <settings>
    23.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    24.     </settings>
    26.     <typeAliases>
    27.         <package name=""/>
    28.     </typeAliases>
    30.     <mappers>
    31.         <mapper resource=""/>
    32.     </mappers>
    33. </configuration><?xml version="1.0" encoding="UTF-8" ?>
    34. <!DOCTYPE configuration
    35.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    36.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    37. <configuration>
    38.     <settings>
    39.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    40.     </settings>
    42.     <typeAliases>
    43.         <package name=""/>
    44.     </typeAliases>
    46.     <mappers>
    47.         <mapper resource=""/>
    48.     </mappers>
    49. </configuration><?xml version="1.0" encoding="UTF-8" ?>
    50. <!DOCTYPE configuration
    51.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    52.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    53. <configuration>
    54.     <settings>
    55.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    56.     </settings>
    58.     <typeAliases>
    59.         <package name=""/>
    60.     </typeAliases>
    62.     <mappers>
    63.         <mapper resource=""/>
    64.     </mappers>
    65. </configuration><?xml version="1.0" encoding="UTF-8" ?>
    66. <!DOCTYPE configuration
    67.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    68.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    69. <configuration>
    70.     <settings>
    71.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    72.     </settings>
    74.     <typeAliases>
    75.         <package name=""/>
    76.     </typeAliases>
    78.     <mappers>
    79.         <mapper resource=""/>
    80.     </mappers>
    81. </configuration>        

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    到此，持久层编写完毕！
    
    5、Spring层(Service层)
    
    编写业务接口和接口实现
    1. package com.moondream.service;
    3. import com.moondream.pojo.Book;
    5. import java.util.List;
    7. //BookService: 需要具体实现,调用dao层
    8. public interface BookService {
    9.     //增加一个Book
    10.     Integer addBook(Book book);
    12.     //根据id删除一个Book
    13.     Integer deleteBookById(Integer id);
    15.     //更新Book
    16.     Integer updateBook(Book Book);
    18.     //根据id查询,返回一个Book
    19.     Book queryBookById(Integer id);
    21.     //查询全部Book,返回list集合
    22.     List<Book> queryAllBook();
    23. }

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    1. package com.moondream.service;
    3. import com.moondream.dao.BookMapper;
    4. import com.moondream.pojo.Book;
    5. import org.springframework.beans.factory.annotation.Autowired;
    6. import org.springframework.stereotype.Service;
    8. import java.util.List;
    10. @Service
    11. public class BookServiceImpl implements BookService {
    12.     //调用dao层
    13.     @Autowired
    14.     private BookMapper bookMapper;
    16.     public Integer addBook(Book book) {
    17.         return bookMapper.addBook(book);
    18.     }
    20.     public Integer deleteBookById(Integer id) {
    21.         return bookMapper.deleteBookById(id);
    22.     }
    24.     public Integer updateBook(Book Book) {
    25.         return bookMapper.updateBook(Book);
    26.     }
    28.     public Book queryBookById(Integer id) {
    29.         return bookMapper.queryBookById(id);
    30.     }
    32.     public List<Book> queryAllBook() {
    33.         return bookMapper.queryAllBook();
    34.     }
    35. }

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    编写 spring-service.xml ，Spring的service层配置文件
    1. <?xml version="1.0" encoding="UTF-8" ?>
    2. <!DOCTYPE configuration
    3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    4.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    5. <configuration>
    6.     <settings>
    7.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    8.     </settings>
    10.     <typeAliases>
    11.         <package name=""/>
    12.     </typeAliases>
    14.     <mappers>
    15.         <mapper resource=""/>
    16.     </mappers>
    17. </configuration><?xml version="1.0" encoding="UTF-8" ?>
    18. <!DOCTYPE configuration
    19.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    20.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    21. <configuration>
    22.     <settings>
    23.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    24.     </settings>
    26.     <typeAliases>
    27.         <package name=""/>
    28.     </typeAliases>
    30.     <mappers>
    31.         <mapper resource=""/>
    32.     </mappers>
    33. </configuration><?xml version="1.0" encoding="UTF-8" ?>
    34. <!DOCTYPE configuration
    35.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    36.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    37. <configuration>
    38.     <settings>
    39.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    40.     </settings>
    42.     <typeAliases>
    43.         <package name=""/>
    44.     </typeAliases>
    46.     <mappers>
    47.         <mapper resource=""/>
    48.     </mappers>
    49. </configuration>   

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    服务层编写完毕！
    
    6、SpringMVC层(Controller层)
    
    由于 Controller层 需要不断的与 View层 举行联动，
    以是当我们编写完Controller层，实在View层也已经完成的差不多了。
    编写 web.xml
    1. <?xml version="1.0" encoding="UTF-8"?>
    2. <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    3.          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    4.          xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
    5.          version="4.0">
    7.     <servlet>
    8.         <servlet-name>DispatcherServlet</servlet-name>
    9.         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    10.         <init-param>
    11.             <param-name>contextConfigLocation</param-name>
    12.             
    13.             <param-value>classpath:applicationContext.xml</param-value>
    14.         </init-param>
    15.         <load-on-startup>1</load-on-startup>
    16.     </servlet>
    17.     <servlet-mapping>
    18.         <servlet-name>DispatcherServlet</servlet-name>
    19.         <url-pattern>/</url-pattern>
    20.     </servlet-mapping>
    22.    
    23.     <filter>
    24.         <filter-name>EncodingFilter</filter-name>
    25.         <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    26.         <init-param>
    27.             <param-name>encoding</param-name>
    28.             <param-value>utf-8</param-value>
    29.         </init-param>
    30.     </filter>
    31.     <filter-mapping>
    32.         <filter-name>EncodingFilter</filter-name>
    33.         <url-pattern>/*</url-pattern>
    34.     </filter-mapping>
    36.    
    37.     <session-config>
    38.         <session-timeout>15</session-timeout>
    39.     </session-config>
    41. </web-app>

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    编写 spring-controller.xml ，Spring的Controller层配置
    1. <?xml version="1.0" encoding="UTF-8" ?>
    2. <!DOCTYPE configuration
    3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    4.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    5. <configuration>
    6.     <settings>
    7.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    8.     </settings>
    10.     <typeAliases>
    11.         <package name=""/>
    12.     </typeAliases>
    14.     <mappers>
    15.         <mapper resource=""/>
    16.     </mappers>
    17. </configuration>        

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    配置文件，暂时结束！现在举行 Controller层 和 View层 编写
    BookController 类编写 ， 方法一：查询全部书籍
    1. package com.moondream.controller;
    3. @Controller
    4. @RequestMapping("/book")
    5. public class BookController {
    6.     @Autowired
    7.     private BookService bookService;
    9.     @RequestMapping("/allBook")
    10.     public String list(Model model) {
    11.         List<Book> list = bookService.queryAllBook();
    12.         model.addAttribute("list", list);
    13.         return "allBook";
    14.     }
    15. }

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    编写首页 index.jsp
    1. <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
    2. <!DOCTYPE HTML>
    3. <html>
    4. <head>
    5.     <title>首页</title>
    6.    
    7. </head>
    8. <body>
    9. <h3>
    10.     <a target="_blank" href="https://www.cnblogs.com/${pageContext.request.contextPath}/book/allBook">点击进入列表页</a>
    11. </h3>
    12. </body>
    13. </html>

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    书籍列表页面 allbook.jsp
    1.     书籍列表<?xml version="1.0" encoding="UTF-8" ?>
    2. <!DOCTYPE configuration
    3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    4.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    5. <configuration>
    6.     <settings>
    7.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    8.     </settings>
    10.     <typeAliases>
    11.         <package name=""/>
    12.     </typeAliases>
    14.     <mappers>
    15.         <mapper resource=""/>
    16.     </mappers>
    17. </configuration>    [size=6]                    书籍列表 —— 显示所有书籍                [/size]
    19. <?xml version="1.0" encoding="UTF-8" ?>
    20. <!DOCTYPE configuration
    21.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    22.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    23. <configuration>
    24.     <settings>
    25.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    26.     </settings>
    28.     <typeAliases>
    29.         <package name=""/>
    30.     </typeAliases>
    32.     <mappers>
    33.         <mapper resource=""/>
    34.     </mappers>
    35. </configuration>[url=https://www.cnblogs.com/${pageContext.request.contextPath}/book/toAddBook]新增[/url]                                    [table]                                [tr]                    书籍编号                    书籍名字                    书籍数目                    书籍详情                    操作                [/tr]<?xml version="1.0" encoding="UTF-8" ?>
    36. <!DOCTYPE configuration
    37.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    38.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    39. <configuration>
    40.     <settings>
    41.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    42.     </settings>
    44.     <typeAliases>
    45.         <package name=""/>
    46.     </typeAliases>
    48.     <mappers>
    49.         <mapper resource=""/>
    50.     </mappers>
    51. </configuration>                    [tr]                        [td]${book.getBookID()}[/td]                        [td]${book.getBookName()}[/td]                        [td]${book.getBookCounts()}[/td]                        [td]${book.getDetail()}[/td]                        [td]                            [url=https://www.cnblogs.com/${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}]更改[/url] |                            [url=https://www.cnblogs.com/${pageContext.request.contextPath}/book/del/${book.getBookID()}]删除[/url]                        [/td]                    [/tr]                                            [/table]            

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    BookController 类编写 ， 方法二：添加书籍
    1. @RequestMapping("/toAddBook")
    2. public String toAddPaper() {
    3.     return "addBook";
    4. }
    6. @RequestMapping("/addBook")
    7. public String addPaper(Book book) {
    8.     System.out.println(book);
    9.     bookService.addBook(book);
    10.     return "redirect:/book/allBook";
    11. }

    复制代码
    添加书籍 页面：addBook.jsp
    1.     新增书籍<?xml version="1.0" encoding="UTF-8" ?>
    2. <!DOCTYPE configuration
    3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    4.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    5. <configuration>
    6.     <settings>
    7.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    8.     </settings>
    10.     <typeAliases>
    11.         <package name=""/>
    12.     </typeAliases>
    14.     <mappers>
    15.         <mapper resource=""/>
    16.     </mappers>
    17. </configuration>    [size=6]                    新增书籍                [/size]
    19.                                     书籍名称：
    22.         书籍数目：
    25.         书籍详情：
    28.             

    复制代码
    BookController 类编写 ， 方法三：修改书籍
    1. @RequestMapping("/toUpdateBook")
    2. public String toUpdateBook(Model model, Integer id) {
    3.     Book book = bookService.queryBookById(id);
    4.     System.out.println(book);
    5.     model.addAttribute("book", book);
    6.     return "updateBook";
    7. }
    9. @RequestMapping("/updateBook")
    10. public String updateBook(Book book) {
    11.     System.out.println(book);
    12.     bookService.updateBook(book);
    13.     return "redirect:/book/allBook";
    14. }

    复制代码
    修改书籍 页面 updateBook.jsp
    1.     修改信息<?xml version="1.0" encoding="UTF-8" ?>
    2. <!DOCTYPE configuration
    3.         PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    4.         "https://mybatis.org/dtd/mybatis-3-config.dtd">
    5. <configuration>
    6.     <settings>
    7.         <setting name="logImpl" value="STDOUT_LOGGING"/>
    8.     </settings>
    10.     <typeAliases>
    11.         <package name=""/>
    12.     </typeAliases>
    14.     <mappers>
    15.         <mapper resource=""/>
    16.     </mappers>
    17. </configuration>    [size=6]                    修改信息                [/size]
    19.                                             书籍名称：        书籍数目：        书籍详情：            

    复制代码
    BookController 类编写 ， 方法四：删除书籍
    1. @RequestMapping("/del/{bookId}")
    2. public String deleteBook(@PathVariable Integer bookId) {
    3.     bookService.deleteBookById(bookId);
    4.     return "redirect:/book/allBook";
    5. }

    复制代码
    Controller层 与 View层 编写完毕！
    末了，做一些收尾和辅助性的工作，比如，横切日志提示，表明当前程序实验到哪一步了……
    在com.moondream包下，新增log包，编写切面
    [code]package com.moondream.log;import org.aspectj.lang.ProceedingJoinPoint;import org.aspectj.lang.annotation.Around;import org.aspectj.lang.annotation.Aspect;import org.springframework.stereotype.Component;import java.text.SimpleDateFormat;import java.util.Date;@Aspect@Componentpublic class IndicationLog {    @Around("within(com.moondream.*.*+)")    public Object Indication(ProceedingJoinPoint pjp) throws Throwable {        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");        String date = sdf.format(new Date());        System.err.println("[" + date + "] " + pjp.getSignature().toShortString() + " ==>");        Object value = pjp.proceed();        System.err.println("