【Spring】SSM整合

环境要求：

• IDEA
• MySQL 8.0 CE
• Tomcat 9.0.41
• Maven 3.6.3

完整的项目地址为：https://codechina.csdn.net/dreaming_coder/ssm

1. 创建数据库

/*
Navicat MySQL Data Transfer

Source Server         : ice
Source Server Version : 80021
Source Host           : localhost:3306
Source Database       : ssm

Target Server Type    : MYSQL
Target Server Version : 80021
File Encoding         : 65001

Date: 2021-01-14 21:34:07
*/

SET FOREIGN_KEY_CHECKS=0;

-- ----------------------------
-- Table structure for books
-- ----------------------------
DROP TABLE IF EXISTS `books`;
CREATE TABLE `books` (
  `book_id` int NOT NULL AUTO_INCREMENT COMMENT '书本编号',
  `book_name` varchar(100) NOT NULL COMMENT '书名',
  `book_counts` int NOT NULL COMMENT '数量',
  `detail` varchar(200) DEFAULT NULL COMMENT '描述',
  PRIMARY KEY (`book_id`)
) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;

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

2. 新建 Maven 项目

1. 添加 web 支持

2. 导入相关依赖

   <dependencies>
       
       <dependency>
           <groupId>junitgroupId>
           <artifactId>junitartifactId>
           <version>4.13version>
       dependency>
       
       <dependency>
           <groupId>mysqlgroupId>
           <artifactId>mysql-connector-javaartifactId>
           <version>8.0.22version>
       dependency>
       
       <dependency>
           <groupId>com.mchangegroupId>
           <artifactId>c3p0artifactId>
           <version>0.9.5.5version>
       dependency>
       
       <dependency>
           <groupId>javax.servletgroupId>
           <artifactId>servlet-apiartifactId>
           <version>2.5version>
       dependency>
       <dependency>
           <groupId>javax.servlet.jspgroupId>
           <artifactId>jsp-apiartifactId>
           <version>2.2version>
       dependency>
       <dependency>
           <groupId>javax.servletgroupId>
           <artifactId>jstlartifactId>
           <version>1.2version>
       dependency>
       
       <dependency>
           <groupId>org.mybatisgroupId>
           <artifactId>mybatisartifactId>
           <version>3.5.6version>
       dependency>
       <dependency>
           <groupId>org.mybatisgroupId>
           <artifactId>mybatis-springartifactId>
           <version>2.0.6version>
       dependency>
       
       <dependency>
           <groupId>org.springframeworkgroupId>
           <artifactId>spring-webmvcartifactId>
           <version>5.3.2version>
       dependency>
       <dependency>
           <groupId>org.springframeworkgroupId>
           <artifactId>spring-jdbcartifactId>
           <version>5.3.2version>
       dependency>
       
       <dependency>
           <groupId>org.projectlombokgroupId>
           <artifactId>lombokartifactId>
           <version>RELEASEversion>
           <scope>compilescope>
       dependency>
   dependencies>
   

3. Maven 设置静态资源过滤

   <build>
      <resources>
          <resource>
              <directory>src/main/javadirectory>
              <includes>
                  <include>**/*.propertiesinclude>
                  <include>**/*.xmlinclude>
              includes>
              <filtering>falsefiltering>
          resource>
          <resource>
              <directory>src/main/resourcesdirectory>
              <includes>
                  <include>**/*.propertiesinclude>
                  <include>**/*.xmlinclude>
              includes>
              <filtering>falsefiltering>
          resource>
      resources>
   build>
   

4. 建立基本结构和配置框架

   • com.ice.pojo

   • com.ice.mapper

   • com.ice.service

   • com.ice.controller

   • mybatis-config.xml

     
     
     <configuration>
     
     configuration>
     

   • applicationContext.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"
            xmlns:mvc="http://www.springframework.org/schema/mvc"
            xmlns:aop="http://www.springframework.org/schema/aop"
            xmlns:tx="http://www.springframework.org/schema/tx"
            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/aop http://www.springframework.org/schema/aop/spring-aop.xsd
                                 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
                                 http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">
     
     beans>
     

3. Mybatis 层编写

1. 数据库配置文件 database.properties

   jdbc.driver=com.mysql.cj.jdbc.Driver
   jdbc.url=jdbc:mysql://localhost:3306/mybatis?serverTimezone=Asia/Shanghai&useSSL=true&useUnicode=true&characterEncoding=UTF-8
   jdbc.username=root
   jdbc.password=root
   

2. IDEA 关联数据库

   

3. 编写MyBatis的核心配置文件

   
   
   <configuration>
       
       <typeAliases>
           <package name="com.ice.pojo"/>
       typeAliases>
   
   configuration>
   

4. 编写实体类

   package com.ice.pojo;
   
   import lombok.AllArgsConstructor;
   import lombok.Data;
   import lombok.NoArgsConstructor;
   
   @Data
   @AllArgsConstructor
   @NoArgsConstructor
   public class Books {
          
       private int id;
       private String name;
       private int counts;
       private String detail;
   }
   

5. 编写 Dao 层的 Mapper 接口

   package com.ice.mapper;
   
   import com.ice.pojo.Books;
   import org.apache.ibatis.annotations.Param;
   
   import java.util.List;
   
   public interface BookMapper {
          
   
       // 增加一本书
       int addBook(@Param("book") Books book);
   
       // 删除一本书
       int deleteBookById(@Param("id") int id);
   
       // 更新一本书
       int updateBook(@Param("book") Books book);
   
       // 根据 id 查询一本书
       Books queryBookById(@Param("id") int id);
   
       // 查询全部的书
       List<Books> queryAllBooks();
   
   }
   

6. 编写接口对应的 Mapper.xml 文件

   
   
   
   <mapper namespace="com.ice.mapper.BookMapper">
   
       <insert id="addBook" parameterType="Books">
           insert into ssm.books (book_name, book_counts, detail)
           values (#{name}, #{counts}, #{detail});
       insert>
   
       <delete id="deleteBookById" parameterType="int">
           delete
           from ssm.books
           where book_id = #{id};
       delete>
   
       <update id="updateBook" parameterType="Books">
           update ssm.books
           set book_name   = #{name},
               book_counts = #{counts},
               detail      = #{detail}
           where book_id = #{id};
       update>
   
       <select id="queryBookById" parameterType="int" resultMap="bookMap">
           select *
           from ssm.books
           where book_id = #{id};
       select>
   
       <select id="queryAllBooks" resultMap="bookMap">
           select *
           from ssm.books;
       select>
   
       <resultMap id="bookMap" type="Books">
           <id property="id" column="book_id"/>
           <result property="name" column="book_name"/>
           <result property="counts" column="book_counts"/>
           <result property="details" column="details"/>
       resultMap>
   
   mapper>
   

7. 编写Service层的接口和实现类

   【接口】

   package com.ice.service;
   
   import com.ice.pojo.Books;
   
   import java.util.List;
   
   public interface BookService {
          
   
       // 增加一本书
       int addBook(Books book);
   
       // 删除一本书
       int deleteBookById(int id);
   
       // 更新一本书
       int updateBook(Books book);
   
       // 根据 id 查询一本书
       Books queryBookById(int id);
   
       // 查询全部的书
       List<Books> queryAllBooks();
   
   }
   

   【实现类】

   package com.ice.service;
   
   import com.ice.mapper.BookMapper;
   import com.ice.pojo.Books;
   
   import java.util.List;
   
   public class BookServiceImpl implements BookService {
          
   
       private BookMapper bookMapper;
   
       public void setBookMapper(BookMapper bookMapper) {
          
           this.bookMapper = bookMapper;
       }
   
       @Override
       public int addBook(Books book) {
          
           return bookMapper.addBook(book);
       }
   
       @Override
       public int deleteBookById(int id) {
          
           return bookMapper.deleteBookById(id);
       }
   
       @Override
       public int updateBook(Books book) {
          
           return bookMapper.updateBook(book);
       }
   
       @Override
       public Books queryBookById(int id) {
          
           return bookMapper.queryBookById(id);
       }
   
       @Override
       public List<Books> queryAllBooks() {
          
           return bookMapper.queryAllBooks();
       }
   }
   

4. Spring 层

1. 配置Spring整合MyBatis，我们这里数据源使用 c3p0 连接池，编写 Spring 整合 Mybatis 的相关的配置文件 spring-dao.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">
       
       <context:property-placeholder location="classpath:database.properties"/>
   
       
       
       <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
           <property name="driverClass" value="${jdbc.driver}"/>
           <property name="jdbcUrl" value="${jdbc.url}"/>
           <property name="user" value="${jdbc.username}"/>
           <property name="password" value="${jdbc.password}"/>
   
           
           <property name="maxPoolSize" value="30"/>
           <property name="minPoolSize" value="10"/>
           
           <property name="autoCommitOnClose" value="false"/>
           
           <property name="checkoutTimeout" value="10000"/>
           
           <property name="acquireRetryAttempts" value="2"/>
       bean>
   
       
       <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
           <property name="dataSource" ref="dataSource"/>
           
           <property name="configLocation" value="classpath:mybatis-config.xml"/>
       bean>
   
       
       
       <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
           
           <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
           
           <property name="basePackage" value="com.ice.mapper"/>
       bean>
   
   beans>
   

2. Spring 整合 service 层

   
   <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">
   
       
       <context:component-scan base-package="com.ice.service"/>
   
       
       <bean id="bookServiceImpl" class="com.ice.service.BookServiceImpl">
           <property name="bookMapper" ref="bookMapper"/>
       bean>
   
       
       <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
           
           <property name="dataSource" ref="dataSource"/>
       bean>
   
   beans>
   

5. Spring MVC 层

1. 配置 web.xml

   
   <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">
   
       
       <servlet>
           <servlet-name>SpringMVCservlet-name>
           <servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
           
           <init-param>
               <param-name>contextConfigLocationparam-name>
               <param-value>classpath:applicationContext.xmlparam-value>
           init-param>
           
           <load-on-startup>1load-on-startup>
       servlet>
       
       <servlet-mapping>
           <servlet-name>SpringMVCservlet-name>
           <url-pattern>/url-pattern>
       servlet-mapping>
   
       
       <filter>
           <filter-name>encodingfilter-name>
           <filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
           <init-param>
               <param-name>encodingparam-name>
               <param-value>utf-8param-value>
           init-param>
       filter>
       <filter-mapping>
           <filter-name>encodingfilter-name>
           <url-pattern>/*url-pattern>
       filter-mapping>
       
       
       <session-config>
           <session-timeout>15session-timeout>
       session-config>
   web-app>
   

2. 配置 spring-mvc.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"
          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 http://www.springframework.org/schema/mvc/spring-mvc.xsd">
   
       
       <mvc:annotation-driven />
   
       
       <mvc:default-servlet-handler/>
       
       
       <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" id="internalResourceViewResolver">
           
           <property name="prefix" value="/WEB-INF/jsp/"/>
           
           <property name="suffix" value=".jsp"/>
       bean>
   
       
       <context:component-scan base-package="com.ice.controller"/>
   
   beans>
   

3. Spring 配置整合文件，applicationContext.xml

   
   <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">
       
       <import resource="classpath:spring-dao.xml"/>
       <import resource="classpath:spring-service.xml"/>
       <import resource="classpath:spring-mvc.xml"/>
   
   beans>
   

6. Controller 和视图层

1. BookController 类编写

   package com.ice.controller;
   
   import com.ice.pojo.Books;
   import com.ice.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;
   
       // 查询全部书籍，并返回一个书籍展示页面
       @RequestMapping("/list")
       public String list(Model model) {
          
           List<Books> list = bookService.queryAllBooks();
           model.addAttribute("list", list);
           return "list";
       }
   
       @RequestMapping("/toAddBook")
       public String toAddBook() {
          
           return "addBook";
       }
   
       @RequestMapping("/add")
       public String add(Books book) {
          
           bookService.addBook(book);
           return "redirect:/book/list";
       }
   
       @RequestMapping("/toUpdateBook")
       public String toUpdateBook(Model model, int id) {
          
           Books book = bookService.queryBookById(id);
           model.addAttribute("book", book);
           return "updateBook";
       }
   
       @RequestMapping("/update")
       public String update(Model model, Books book) {
          
           bookService.updateBook(book);
           return "redirect:/book/list";
       }
   
       @RequestMapping("/delete/{bookId}")
       public String delete(@PathVariable("bookId") int id) {
          
           bookService.deleteBookById(id);
           return "redirect:/book/list";
       }
   
   }
   

2. 编写首页 index.jsp

   <%@ page contentType="text/html;charset=UTF-8" language="java" %>
   <html>
   <head>
       <title>首页title>
       <style type="text/css">
           a {
           
               text-decoration: none;
               color: black;
               font-size: 18px;
           }
           h3 {
           
               width: 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/list">进入书籍页面a>h3>
   body>
   html>
   

3. 书籍列表页面 list.jsp

   <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
   <%@ page contentType="text/html;charset=UTF-8" language="java" %>
   <html>
   <head>
       <title>书籍展示title>
       <meta name="viewport" content="width=device-width, initial-scale=1.0">
       
       <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.getId()}td>
                           <td>${book.getName()}td>
                           <td>${book.getCounts()}td>
                           <td>${book.getDetail()}td>
                           <td>
                               <a href="${pageContext.request.contextPath}/book/toUpdateBook?id=${book.getId()}">更改a> |
                               <a href="${pageContext.request.contextPath}/book/delete/${book.getId()}">删除a>
                           td>
                       tr>
                   c:forEach>
                   tbody>
               table>
           div>
       div>
   div>
   body>
   html>
   

4. 添加书籍页面：addBook.jsp

   <%@ 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">
       
       <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/add" method="post">
           书籍名称：<input type="text" name="name"><br><br><br>
           书籍数量：<input type="text" name="counts"><br><br><br>
           书籍详情：<input type="text" name="detail"><br><br><br>
           <input type="submit" value="添加">
       form>
   
   div>
   body>
   html>
   

5. 修改书籍页面 updateBook.jsp

   <%@ page contentType="text/html;charset=UTF-8" language="java" %>
   <html>
   <head>
       <title>修改书籍title>
       <meta name="viewport" content="width=device-width, initial-scale=1.0">
       
       <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>新增信息small>
                   h1>
               div>
           div>
       div>
       <form action="${pageContext.request.contextPath}/book/update" method="post">
           <input type="hidden" name="id" value="${book.getId()}"/>
           书籍名称：<input type="text" name="name" value="${book.getName()}"/>
           书籍数量：<input type="text" name="counts" value="${book.getCounts()}"/>
           书籍详情：<input type="text" name="detail" value="${book.getDetail() }"/>
           <input type="submit" value="提交"/>
       form>
   
   div>
   body>
   html>
   

7. 配置 Tomcat 运行

8. 项目结构图