SpringMVC——SSM整合

1、环境要求：

• IDEA
• MySQL 5.1.19
• Tomcat 9
• Maven 3.6.1

2、数据库环境搭建

创建一个存放书籍的数据库表

CREATE DATABASE `ssmbuild`;

USE `ssmbuild`;

DROP TABLE IF EXISTS `books`;

CREATE TABLE `books` (
  `bookID` INT(10) NOT NULL AUTO_INCREMENT COMMENT '书id',
  `bookName` VARCHAR(100) NOT NULL COMMENT '书名',
  `bookCounts` INT(11) NOT NULL COMMENT '数量',
  `detail` VARCHAR(200) NOT NULL COMMENT '描述',
  KEY `bookID` (`bookID`)
) ENGINE=INNODB DEFAULT CHARSET=utf8

INSERT  INTO `books`(`bookID`,`bookName`,`bookCounts`,`detail`)VALUES 
(1,'Java',1,'从入门到放弃'),
(2,'MySQL',10,'从删库到跑路'),
(3,'Linux',5,'从进门到进牢');

2、基本环境搭建

1. 首先看一下基本结构
   

2. 新建一个Maven项目ssmbuild，添加web的支持！

3. 导入pom.xml依赖

    <dependencies>
           <!--Junit-->
           <dependency>
               <groupId>junit</groupId>
               <artifactId>junit</artifactId>
               <version>4.12</version>
           </dependency>
           <!--数据库驱动-->
           <dependency>
               <groupId>mysql</groupId>
               <artifactId>mysql-connector-java</artifactId>
               <version>5.1.47</version>
           </dependency>
           <!-- 数据库连接池 -->
           <dependency>
               <groupId>com.mchange</groupId>
               <artifactId>c3p0</artifactId>
               <version>0.9.5.2</version>
           </dependency>
   
           <!--Servlet - JSP -->
           <dependency>
               <groupId>javax.servlet</groupId>
               <artifactId>servlet-api</artifactId>
               <version>2.5</version>
           </dependency>
           <dependency>
               <groupId>javax.servlet.jsp</groupId>
               <artifactId>jsp-api</artifactId>
               <version>2.2</version>
           </dependency>
           <dependency>
               <groupId>javax.servlet</groupId>
               <artifactId>jstl</artifactId>
               <version>1.2</version>
           </dependency>
   
           <!--Mybatis-->
           <dependency>
               <groupId>org.mybatis</groupId>
               <artifactId>mybatis</artifactId>
               <version>3.5.2</version>
           </dependency>
           <dependency>
               <groupId>org.mybatis</groupId>
               <artifactId>mybatis-spring</artifactId>
               <version>2.0.2</version>
           </dependency>
   
           <!--Spring-->
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-webmvc</artifactId>
               <version>5.1.9.RELEASE</version>
           </dependency>
           <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-jdbc</artifactId>
               <version>5.1.9.RELEASE</version>
           </dependency>
           <dependency>
               <groupId>org.projectlombok</groupId>
               <artifactId>lombok</artifactId>
               <version>1.18.12</version>
           </dependency>
           <dependency>
               <groupId>org.projectlombok</groupId>
               <artifactId>lombok</artifactId>
               <version>1.18.12</version>
           </dependency>
       </dependencies>
   
   

4. 在pom.xml添加资源过滤设置

    <build>
           <resources>
               <resource>
                   <directory>src/main/java</directory>
                   <includes>
                       <include>**/*.properties</include>
                       <include>**/*.xml</include>
                   </includes>
                   <filtering>false</filtering>
               </resource>
               <resource>
                   <directory>src/main/resources</directory>
                   <includes>
                       <include>**/*.properties</include>
                       <include>**/*.xml</include>
                   </includes>
                   <filtering>false</filtering>
               </resource>
           </resources>
       </build>
   

5. 建立基本结构和配置框架

   • com.jjh.pojo

   • com.jjh.dao

   • com.jjh.service

   • com.jjh.controller

   • mybatis-config.xml

     <?xml version="1.0" encoding="UTF-8" ?>
     <!DOCTYPE configuration
             PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
             "http://mybatis.org/dtd/mybatis-3-config.dtd">
     <configuration>
     
     </configuration>
     

   • applicationContext.xml

     <?xml version="1.0" encoding="UTF-8"?>
     <beans xmlns="http://www.springframework.org/schema/beans"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.springframework.org/schema/beans
             http://www.springframework.org/schema/beans/spring-beans.xsd">
     
     </beans>
     

3、Mybatis层编写

1. 编写数据库配置文件database.properties

   jdbc.driver=com.mysql.jdbc.Driver
   jdbc.url=jdbc:mysql://localhost:3306/ssmbuild?useSSL=true&useUnicode=true&characterEncoding=utf8
   jdbc.username=root
   jdbc.password=123456
   

2. IDEA关联数据库配置
   

3. 编写Mybatis的核心配置文件

   <?xml version="1.0" encoding="UTF-8" ?>
   <!DOCTYPE configuration
           PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
           "http://mybatis.org/dtd/mybatis-3-config.dtd">
   <configuration>
   
       <typeAliases>
           <package name="com.jjh.pojo"/>
       </typeAliases>
       <mappers>
           <mapper resource="com/jjh/dao/BookMapper.xml"/>
       </mappers>
   </configuration>
   

4. 编写数据库的实体类com.jiang.pojo.Books(使用lombok插件)

   package com.jjh.pojo;
   
   import lombok.AllArgsConstructor;
   import lombok.Data;
   import lombok.NoArgsConstructor;
   
   @Data
   @AllArgsConstructor
   @NoArgsConstructor
   public class Books {
       private int bookID;
       private String bookName;
       private int bookCounts;
       private String detail;
   
   }
   
   

5. 编写Dao层的接口BookMapper

   package com.jjh.dao;
   
   import com.jjh.pojo.Books;
   
   import java.util.List;
   
   public interface BookMapper {
       //增加一个Book
       int addBook(Books book);
   
       //根据id删除一个Book
       int deleteBookById(int id);
   
       //更新Book
       int updateBook(Books books);
   
       //根据id查询,返回一个Book
       Books queryBookById(int id);
   
       //查询全部Book,返回list集合
       List<Books> queryAllBook();
   }
   
   

6. 编写接口对应的BookMapper.xml文件，需要导入MyBatis的包

   <?xml version="1.0" encoding="UTF-8" ?>
   <!DOCTYPE mapper
           PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
           "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
   
   <mapper namespace="com.jjh.dao.BookMapper">
   
       <!--增加一个Book-->
       <insert id="addBook" parameterType="Books">
           insert into ssmbuild.books(bookName,bookCounts,detail)
           values (#{bookName}, #{bookCounts}, #{detail})
       </insert>
   
       <!--根据id删除一个Book-->
       <delete id="deleteBookById" parameterType="int">
           delete from ssmbuild.books where bookID=#{bookID}
       </delete>
   
       <!--更新Book-->
       <update id="updateBook" parameterType="Books">
           update ssmbuild.books
           set bookName = #{bookName},bookCounts = #{bookCounts},detail = #{detail}
           where bookID = #{bookID}
       </update>
   
       <!--根据id查询,返回一个Book-->
       <select id="queryBookById" resultType="Books">
           select * from ssmbuild.books
           where bookID = #{bookID}
       </select>
   
       <!--查询全部Book-->
       <select id="queryAllBook" resultType="Books">
           SELECT * from ssmbuild.books
       </select>
   
   </mapper>
   

7. 编写Service层的接口和实现类

   • 接口：BookService

     package com.jjh.service;
     
     
     import com.jjh.pojo.Books;
     
     import java.util.List;
     
     //BookService:底下需要去实现,调用dao层
     public interface BookService {
         //增加一个Book
         int addBook(Books book);
         //根据id删除一个Book
         int deleteBookById(int id);
         //更新Book
         int updateBook(Books books);
         //根据id查询,返回一个Book
         Books queryBookById(int id);
         //查询全部Book,返回list集合
         List<Books> queryAllBook();
     }
     

   • 实现类：BookServiceImpl

     package com.jjh.service;
     
     import com.jjh.dao.BookMapper;
     import com.jjh.pojo.Books;
     
     import java.util.List;
     
     public class BookServiceImpl implements BookService {
     
         //调用dao层的操作，设置一个set接口，方便Spring管理
         private BookMapper bookMapper;
     
         public void setBookMapper(BookMapper bookMapper) {
             this.bookMapper = bookMapper;
         }
     
         public int addBook(Books book) {
             return bookMapper.addBook(book);
         }
     
         public int deleteBookById(int id) {
             return bookMapper.deleteBookById(id);
         }
     
         public int updateBook(Books books) {
             return bookMapper.updateBook(books);
         }
     
         public Books queryBookById(int id) {
             return bookMapper.queryBookById(id);
         }
     
         public List<Books> queryAllBook() {
             return bookMapper.queryAllBook();
         }
     }
     

​ 到这一步，底层需求编写完成！

4、Spring层编写

在resources目录下建一个spring包里面放Spring相关的配置文件：s

• 编写Spring整合Mybatis相关的配置文件，我们这里使用c3p0连接池
  spring-dao.xml

  <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:context="http://www.springframework.org/schema/context"
         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">
  
      <!-- 配置整合mybatis -->
      <!-- 1.关联数据库文件 -->
      <context:property-placeholder location="classpath:database.properties"/>
  
      <!-- 2.数据库连接池 -->
      <!--数据库连接池
  dbcp  半自动化操作  不能自动连接
  c3p0  自动化操作（自动的加载配置文件 并且设置到对象里面）
      -->
      <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
          <!-- 配置连接池属性 -->
          <property name="driverClass" value="${jdbc.driver}"/>
          <property name="jdbcUrl" value="${jdbc.url}"/>
          <property name="user" value="${jdbc.username}"/>
          <property name="password" value="${jdbc.password}"/>
  
          <!-- c3p0连接池的私有属性 -->
          <property name="maxPoolSize" value="30"/>
          <property name="minPoolSize" value="10"/>
          <!-- 关闭连接后不自动commit -->
          <property name="autoCommitOnClose" value="false"/>
          <!-- 获取连接超时时间 -->
          <property name="checkoutTimeout" value="10000"/>
          <!-- 当获取连接失败重试次数 -->
          <property name="acquireRetryAttempts" value="2"/>
      </bean>
  
      <!-- 3.配置SqlSessionFactory对象 -->
      <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
          <!-- 注入数据库连接池 -->
          <property name="dataSource" ref="dataSource"/>
          <!-- 配置MyBaties全局配置文件:mybatis-config.xml -->
          <property name="configLocation" value="classpath:mybatis-config.xml"/>
      </bean>
  
      <!-- 4.配置扫描Dao接口包，动态实现Dao接口注入到spring容器中 -->
      <!--解释 ： https://www.cnblogs.com/jpfss/p/7799806.html-->
      <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
          <!-- 注入sqlSessionFactory -->
          <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
          <!-- 给出需要扫描Dao接口包 -->
          <property name="basePackage" value="com.jjh.dao"/>
      </bean>
  
  </beans>
  

• Spring整合Service层spring-service.xml

  <beans xmlns="http://www.springframework.org/schema/beans"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:context="http://www.springframework.org/schema/context"
         xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context.xsd">
  
      <!-- 扫描service相关的bean -->
      <context:component-scan base-package="com.jjh.service" />
  
      <!--BookServiceImpl注入到IOC容器中-->
      <bean id="BookServiceImpl" class="com.jjh.service.BookServiceImpl">
          <property name="bookMapper" ref="bookMapper"/>
      </bean>
  
      <!-- 配置事务管理器 -->
      <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
          <!-- 注入数据库连接池 -->
          <property name="dataSource" ref="dataSource" />
      </bean>
  
  </beans>
  

5、Spring层编写

1. web.xml编写(固定写法)

   <?xml version="1.0" encoding="UTF-8"?>
   <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
            version="4.0">
       <!--DispatcherServlet-->
       <servlet>
           <servlet-name>DispatcherServlet</servlet-name>
           <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
           <init-param>
               <param-name>contextConfigLocation</param-name>
               <param-value>classpath:applicationContext.xml</param-value>
           </init-param>
           <load-on-startup>1</load-on-startup>
       </servlet>
       <servlet-mapping>
           <servlet-name>DispatcherServlet</servlet-name>
           <url-pattern>/</url-pattern>
       </servlet-mapping>
   
       <!--encodingFilter-->
       <filter>
           <filter-name>encodingFilter</filter-name>
           <filter-class>
               org.springframework.web.filter.CharacterEncodingFilter
           </filter-class>
           <init-param>
               <param-name>encoding</param-name>
               <param-value>utf-8</param-value>
           </init-param>
       </filter>
       <filter-mapping>
           <filter-name>encodingFilter</filter-name>
           <url-pattern>/*</url-pattern>
       </filter-mapping>
   
       <!--Session过期时间-->
       <session-config>
           <session-timeout>15</session-timeout>
       </session-config>
   </web-app>
   

2. 在spring文件下建立spring-mvc.xml

   <?xml version="1.0" encoding="UTF-8"?>
   <beans xmlns="http://www.springframework.org/schema/beans"
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
          xmlns:context="http://www.springframework.org/schema/context"
          xmlns:mvc="http://www.springframework.org/schema/mvc"
          xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       https://www.springframework.org/schema/mvc/spring-mvc.xsd">
   
       <!-- 配置SpringMVC -->
       <!-- 1.开启SpringMVC注解驱动 -->
       <mvc:annotation-driven />
       <!-- 2.静态资源默认servlet配置-->
       <mvc:default-servlet-handler/>
   
       <!-- 3.配置jsp 显示ViewResolver视图解析器 -->
       <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
           <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" />
           <property name="prefix" value="/WEB-INF/jsp/"/>
           <property name="suffix" value=".jsp"/>
       </bean>
   
       <!-- 4.扫描web相关的bean -->
       <context:component-scan base-package="com.jjh.controller" />
   
   </beans>
   

配置文件结束！

5、Controller层和视图层编写

1. BookController类编写: 方法一：添加书籍

   package com.jjh.controller;
   
   import com.jjh.pojo.Books;
   import com.jjh.service.BookService;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.beans.factory.annotation.Qualifier;
   import org.springframework.stereotype.Controller;
   import org.springframework.ui.Model;
   import org.springframework.web.bind.annotation.PathVariable;
   import org.springframework.web.bind.annotation.RequestMapping;
   
   import java.util.List;
   
   @Controller
   @RequestMapping("/book")
   public class BookController {
   
       @Autowired
       @Qualifier("BookServiceImpl")
       private BookService bookService;
   
       @RequestMapping("/allBook")
       public String list(Model model) {
           List<Books> list = bookService.queryAllBook();
           model.addAttribute("list", list);
           return "allBook";
       }
   

2. 编写首页index.jsp

   <%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8" %>
   <!DOCTYPE HTML>
   <html>
   <head>
       <title>首页</title>
       <style type="text/css">
           a {
               text-decoration: none;
               color: black;
               font-size: 18px;
           }
           h3 {
                180px;
               height: 38px;
               margin: 100px auto;
               text-align: center;
               line-height: 38px;
               background: deepskyblue;
               border-radius: 4px;
           }
       </style>
   </head>
   <body>
   
   <h3>
       <a href="${pageContext.request.contextPath}/book/allBook">点击进入列表页</a>
   </h3>
   </body>
   </html>
   

3. 在WEB-INF/jsp/下创建allBook.jsp

   <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
   <%@ page contentType="text/html;charset=UTF-8" language="java" %>
   <html>
   <head>
       <title>书籍列表</title>
       <meta name="viewport" content="width=device-width, initial-scale=1.0">
       <!-- 引入 Bootstrap -->
       <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
   </head>
   <body>
   
   <div class="container">
   
       <div class="row clearfix">
           <div class="col-md-12 column">
               <div class="page-header">
                   <h1>
                       <small>书籍列表 —— 显示所有书籍</small>
                   </h1>
               </div>
           </div>
       </div>
   
       <div class="row">
           <div class="col-md-4 column">
               <a class="btn btn-primary" href="${pageContext.request.contextPath}/book/toAddBook">新增</a>
           </div>
   
       </div>
   
       <div class="row clearfix">
           <div class="col-md-12 column">
               <table class="table table-hover table-striped">
                   <thead>
                   <tr>
                       <th>书籍编号</th>
                       <th>书籍名字</th>
                       <th>书籍数量</th>
                       <th>书籍详情</th>
                       <th>操作</th>
                   </tr>
                   </thead>
   
                   <tbody>
                   <c:forEach var="book" items="${requestScope.get('list')}">
                       <tr>
                           <td>${book.getBookID()}</td>
                           <td>${book.getBookName()}</td>
                           <td>${book.getBookCounts()}</td>
                           <td>${book.getDetail()}</td>
                           <td>
                               <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getBookID()}">更改</a> |
                               <a href="${pageContext.request.contextPath}/book/del/${book.getBookID()}">删除</a>
                           </td>
                       </tr>
                   </c:forEach>
                   </tbody>
               </table>
           </div>
       </div>
   </div>
   

4. BookController 类编写 : 方法二：添加书籍

    @RequestMapping("/toAddBook")
       public String toAddPaper() {
           return "addBook";
       }
   
       @RequestMapping("/addBook")
       public String addPaper(Books books) {
           System.out.println(books);
           bookService.addBook(books);
           return "redirect:/book/allBook";
       }
   

5. 添加书籍页面：addBook.jsp

   <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
   <%@ page contentType="text/html;charset=UTF-8" language="java" %>
   
   <html>
   <head>
       <title>新增书籍</title>
       <meta name="viewport" content="width=device-width, initial-scale=1.0">
       <!-- 引入 Bootstrap -->
       <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
   </head>
   <body>
   <div class="container">
   
       <div class="row clearfix">
           <div class="col-md-12 column">
               <div class="page-header">
                   <h1>
                       <small>新增书籍</small>
                   </h1>
               </div>
           </div>
       </div>
       <form action="${pageContext.request.contextPath}/book/addBook" method="post">
           书籍名称：<input type="text" name="bookName"><br><br><br>
           书籍数量：<input type="text" name="bookCounts"><br><br><br>
           书籍详情：<input type="text" name="detail"><br><br><br>
           <input type="submit" value="添加">
       </form>
   
   </div>
   

6. BookController 类编写: 方法三：修改书籍

    @RequestMapping("/toUpdateBook")
       public String toUpdateBook(Model model, int id) {
           Books books = bookService.queryBookById(id);
           System.out.println(books);
           model.addAttribute("book",books );
           return "updateBook";
       }
   
       @RequestMapping("/updateBook")
       public String updateBook(Model model, Books book) {
           System.out.println(book);
           bookService.updateBook(book);
           Books books = bookService.queryBookById(book.getBookID());
           model.addAttribute("books", books);
           return "redirect:/book/allBook";
       }
   

7. 编写书籍页面updateBook.jsp

   <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
   <%@ page contentType="text/html;charset=UTF-8" language="java" %>
   <html>
   <head>
       <title>修改信息</title>
       <meta name="viewport" content="width=device-width, initial-scale=1.0">
       <!-- 引入 Bootstrap -->
       <link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
   </head>
   <body>
   <div class="container">
   
       <div class="row clearfix">
           <div class="col-md-12 column">
               <div class="page-header">
                   <h1>
                       <small>修改信息</small>
                   </h1>
               </div>
           </div>
       </div>
   
       <form action="${pageContext.request.contextPath}/book/updateBook" method="post">
           <input type="hidden" name="bookID" value="${book.getBookID()}"/>
           书籍名称：<input type="text" name="bookName" value="${book.getBookName()}"/>
           书籍数量：<input type="text" name="bookCounts" value="${book.getBookCounts()}"/>
           书籍详情：<input type="text" name="detail" value="${book.getDetail() }"/>
           <input type="submit" value="提交"/>
       </form>
   
   </div>
   

8. BookController 类编写 :方法四：删除书籍

   @RequestMapping("/del/{bookId}")
       public String deleteBook(@PathVariable("bookId") int id) {
           bookService.deleteBookById(id);
           return "redirect:/book/allBook";
       }
   

6、运行

1. 配置Tomcat

2. 一定要创建一个lib把我们的jar包倒入进去
   

3. 测试！

   • 数据列表

   • 新增书籍

   • 更新信息
     

7、添加业务流程