Spring+SpringMVC+MyBatis整合
概述
前文记录了Spring MVC的常用功能和MyBatis的基本用法。在实际的项目开发中，需要进行整合，从而使用Spring的依赖注入来减少代码的耦合，使用Spring MVC处理请求并作出响应，使用MyBatis完成数据库操作。
数据准备
在前文创建的mybatis数据库中删除表tb_user重新创建该表，同时新建一张表tb_book，表设计和测试数据如下：
创建/配置项目
创建项目的步骤此处不再赘述，与SpringMVC创建相同（前文链接https://www.cnblogs.com/Dcl-Snow/p/11444751.html）。
项目目录结构如图：
打开项目的pom文件，添加Spring、Spring MVC、Mybatis和连接MySQL数据库的包依赖：
1 <?xml version="1.0" encoding="UTF-8"?> 2 3 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> 5 <modelVersion>4.0.0</modelVersion> 6 7 <groupId>com.snow</groupId> 8 <artifactId>ssmbookproject</artifactId> 9 <version>1.0-SNAPSHOT</version> 10 <packaging>war</packaging> 11 12 <name>ssmbookproject Maven Webapp</name> 13 <!-- FIXME change it to the project's website --> 14 <url>http://www.example.com</url> 15 16 <properties> 17 <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 18 <maven.compiler.source>1.7</maven.compiler.source> 19 <maven.compiler.target>1.7</maven.compiler.target> 20 <!-- spring版本号 --> 21 <spring.version>4.3.10.RELEASE</spring.version> 22 <!-- mybatis版本号 --> 23 <mybatis.version>3.4.6</mybatis.version> 24 </properties> 25 26 <dependencies> 27 <dependency> 28 <groupId>junit</groupId> 29 <artifactId>junit</artifactId> 30 <version>4.11</version> 31 <scope>test</scope> 32 </dependency> 33 <!-- 数据库 --> 34 <dependency> 35 <groupId>mysql</groupId> 36 <artifactId>mysql-connector-java</artifactId> 37 <version>5.1.37</version> 38 <scope>runtime</scope> 39 </dependency> 40 <dependency> 41 <!--jdbc连接池--> 42 <groupId>c3p0</groupId> 43 <artifactId>c3p0</artifactId> 44 <version>0.9.1.2</version> 45 </dependency> 46 <!-- DAO: MyBatis --> 47 <dependency> 48 <groupId>org.mybatis</groupId> 49 <artifactId>mybatis</artifactId> 50 <version>3.3.0</version> 51 </dependency> 52 <dependency> 53 <groupId>org.mybatis</groupId> 54 <artifactId>mybatis-spring</artifactId> 55 <version>1.2.3</version> 56 </dependency> 57 <!-- Servlet web --> 58 <dependency> 59 <groupId>taglibs</groupId> 60 <artifactId>standard</artifactId> 61 <version>1.1.2</version> 62 </dependency> 63 <dependency> 64 <groupId>jstl</groupId> 65 <artifactId>jstl</artifactId> 66 <version>1.2</version> 67 </dependency> 68 <!--Gson--> 69 <dependency> 70 <groupId>com.google.code.gson</groupId> 71 <artifactId>gson</artifactId> 72 <version>2.8.2</version> 73 </dependency> 74 <dependency> 75 <groupId>javax.servlet</groupId> 76 <artifactId>javax.servlet-api</artifactId> 77 <version>3.1.0</version> 78 </dependency> 79 <dependency> 80 <groupId>org.springframework</groupId> 81 <artifactId>spring-core</artifactId> 82 <version>${spring.version}</version> 83 </dependency> 84 <dependency> 85 <groupId>org.springframework</groupId> 86 <artifactId>spring-beans</artifactId> 87 <version>${spring.version}</version> 88 </dependency> 89 <dependency> 90 <groupId>org.springframework</groupId> 91 <artifactId>spring-context</artifactId> 92 <version>${spring.version}</version> 93 </dependency> 94 <dependency> 95 <groupId>org.springframework</groupId> 96 <artifactId>spring-jdbc</artifactId> 97 <version>${spring.version}</version> 98 </dependency> 99 <dependency> 100 <groupId>org.springframework</groupId> 101 <artifactId>spring-tx</artifactId> 102 <version>${spring.version}</version> 103 </dependency> 104 <dependency> 105 <groupId>org.springframework</groupId> 106 <artifactId>spring-web</artifactId> 107 <version>${spring.version}</version> 108 </dependency> 109 <dependency> 110 <groupId>org.springframework</groupId> 111 <artifactId>spring-webmvc</artifactId> 112 <version>${spring.version}</version> 113 </dependency> 114 <dependency> 115 <groupId>org.springframework</groupId> 116 <artifactId>spring-test</artifactId> 117 <version>${spring.version}</version> 118 </dependency> 119 <dependency> 120 <groupId>org.projectlombok</groupId> 121 <artifactId>lombok</artifactId> 122 <version>1.16.22</version> 123 </dependency> 124 </dependencies> 125 126 <build> 127 <finalName>bookproj</finalName> 128 <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) --> 129 <plugins> 130 <plugin> 131 <artifactId>maven-clean-plugin</artifactId> 132 <version>3.1.0</version> 133 </plugin> 134 <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging --> 135 <plugin> 136 <artifactId>maven-resources-plugin</artifactId> 137 <version>3.0.2</version> 138 </plugin> 139 <plugin> 140 <artifactId>maven-compiler-plugin</artifactId> 141 <version>3.8.0</version> 142 </plugin> 143 <plugin> 144 <artifactId>maven-surefire-plugin</artifactId> 145 <version>2.22.1</version> 146 </plugin> 147 <plugin> 148 <artifactId>maven-war-plugin</artifactId> 149 <version>3.2.2</version> 150 </plugin> 151 <plugin> 152 <artifactId>maven-install-plugin</artifactId> 153 <version>2.5.2</version> 154 </plugin> 155 <plugin> 156 <artifactId>maven-deploy-plugin</artifactId> 157 <version>2.8.2</version> 158 </plugin> 159 </plugins> 160 </pluginManagement> 161 </build> 162 </project>
在项目的resources目录下创建jdbc.properties文件，编写如下内容：
1 jdbc.driver=com.mysql.jdbc.Driver 2 jdbc.url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf8 3 jdbc.username=root 4 #“****”是mysql数据库密码 5 jdbc.password=**** 6 #最大连接数 7 maxPoolSize=20 8 #最小连接数 9 minPoolSize=10 10 #连接超时时间 11 checkoutTimeout=60000 12 #失败重连次数 13 acquireRetryAttempts=3
在项目的resources目录下创建applicationContext.xml文件，编写如下内容：
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 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/tx http://www.springframework.org/schema/tx/springtx.xsd"> 6 7 <!--配合MyBatis--> 8 <!--数据库配置文件--> 9 <context:property-placeholder location="classpath:jdbc.properties"/> 10 <!--数据库连接池--> 11 <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> 12 <!--配置连接池属性--> 13 <property name="driverClass" value="${jdbc.driver}"/> 14 <property name="jdbcUrl" value="${jdbc.url}"/> 15 <property name="user" value="${jdbc.username}"/> 16 <property name="password" value="${jdbc.password}"/> 17 <property name="maxPoolSize" value="${maxPoolSize}"/> 18 <property name="minPoolSize" value="${minPoolSize}"/> 19 <property name="autoCommitOnClose" value="false"/> 20 <property name="checkoutTimeout" value="${checkoutTimeout}"/> 21 <property name="acquireRetryAttempts" value="${acquireRetryAttempts}"/> 22 </bean> 23 <!-- 配置 SqlSessionFactory 对象--> 24 <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> 25 <!--注入数据库连接池--> 26 <property name="dataSource" ref="dataSource"/> 27 <!-- MyBaties 配置⽂件 --> 28 <property name="configLocation" value="classpath:mybatis-config.xml"/> 29 <!-- 扫描mapper 需要的 xml ⽂件 --> 30 <property name="mapperLocations" value="classpath:mapper/*.xml"/> 31 </bean> 32 <!-- 配置扫描 mapper 接⼝包， 动态实现 mapper 接⼝， 注⼊到 Spring 容器中 --> 33 <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 34 <!-- 注⼊ sqlSessionFactory --> 35 <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> 36 <!-- 给出需要扫描 mapper 接⼝包 --> 37 <property name="basePackage" value="com.snow.mapper"/> 38 </bean> 39 <!--spring-service--> 40 <!-- 扫描 service 包下所有使⽤注解的类型 --> 41 <context:component-scan base-package="com.snow.service"/> 42 <!-- 配置事务管理器 --> 43 <bean id="transactionManager" 44 class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 45 <!-- 注⼊数据库连接池 --> 46 <property name="dataSource" ref="dataSource"/> 47 </bean> 48 </beans>
在项目的resources目录下创建springmvc-sevlet.xml文件，编写如下内容：
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:p="http://www.springframework.org/schema/p" 5 xmlns:context="http://www.springframework.org/schema/context" 6 xmlns:mvc="http://www.springframework.org/schema/mvc" 7 xsi:schemaLocation="http://www.springframework.org/schema/beans 8 http://www.springframework.org/schema/beans/spring-beans.xsd 9 http://www.springframework.org/schema/mvc 10 http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd 11 http://www.springframework.org/schema/context 12 http://www.springframework.org/schema/context/spring-context.xsd"> 13 14 <!--spring可以自动扫描base-package设置的包或子包下的java类，如果扫描到有spring相关注解的类，则注册为spring的bean--> 15 <context:component-scan base-package="com.snow.controller"/> 16 <!-- 配置注解驱动 --> 17 <mvc:annotation-driven/> 18 <!-- 视图解析器 --> 19 <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 20 <!--前缀--> 21 <property name="prefix" value="/WEB-INF/views/"/> 22 <!--后缀--> 23 <property name="suffix" value=".jsp"/> 24 </bean> 25 <!--静态资源默认servlet配置：1、加⼊对静态资源js、gif、png的处理；2、允许使⽤"/"做整体映射--> 26 <mvc:default-servlet-handler/> 27 </beans>
在项目的web.xml文件中编写如下内容：
1 <!DOCTYPE web-app PUBLIC 2 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" 3 "http://java.sun.com/dtd/web-app_2_3.dtd" > 4 <web-app> 5 <display-name>ssmbookproject</display-name> 6 <welcome-file-list> 7 <welcome-file>login.jsp</welcome-file> 8 </welcome-file-list> 9 <!--Spring MVC 配置并添加监听--> 10 <context-param> 11 <param-name>contextConfigLocation</param-name> 12 <param-value>classpath:applicationContext.xml</param-value> 13 </context-param> 14 <!-- 字符过滤器 传值乱码--> 15 <filter> 16 <filter-name>encodingFilter</filter-name> 17 <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> 18 <init-param> 19 <param-name>encoding</param-name> 20 <param-value>UTF-8</param-value> 21 </init-param> 22 </filter> 23 <filter-mapping> 24 <filter-name>encodingFilter</filter-name> 25 <url-pattern>/*</url-pattern> 26 </filter-mapping> 27 <listener> 28 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 29 </listener> 30 <!--配置前端控制器 进行请求分发 DispatcherServlet本质也是一个Servlet --> 31 <servlet> 32 <!--名字可以自定义--> 33 <servlet-name>SpringMVC</servlet-name> 34 <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 35 <init-param> 36 <param-name>contextConfigLocation</param-name> 37 <param-value>classpath:springmvc-sevlet.xml</param-value> 38 </init-param> 39 <!--标记容器启动的时候就启动这个servlet--> 40 <load-on-startup>1</load-on-startup> 41 </servlet> 42 <servlet-mapping> 43 <servlet-name>SpringMVC</servlet-name> 44 <!--拦截所有--> 45 <url-pattern>/</url-pattern> 46 </servlet-mapping> 47 </web-app>
程序开发
编写POJO
在com.snow.domain包中创建User.java类文件，编写如下程序：
1 @Data 2 public class User implements Serializable { 3 private Integer id; 4 private String loginname; 5 private String password; 6 private String username; 7 private String phone; 8 private String address; 9 }
再创建Book.java类文件，编写如下程序：
1 @Data 2 public class Book implements Serializable { 3 private Integer id; 4 private String name; 5 private String author; 6 private String publication; 7 private Date publicationdate; 8 private Double price; 9 private String image; 10 private String remark; 11 }
编写mapper接口
在com.snow.mapper包中创建UserMapper.java接口文件，编写如下程序：
1 public interface UserMapper { 2 User findWithLoginnameAndPassword(@Param("loginname") String loginname, @Param("password") String password); 3 }
再创建BookMapper.java接口文件，编写如下程序：
1 public interface BookMapper { 2 List<Book> findAll(); 3 }
编写Service和ServiceImpl
在com.snow.service包中创建UserService.java接口文件，编写如下程序：
1 public interface UserService { 2 User login(String loginname, String password); 3 }
再创建BookService.java接口文件，编写如下程序：
1 public interface BookService { 2 List<Book> getAll(); 3 }
在com.snow.service.impl包中创建UserServiceImpl.java类文件，编写如下程序：
1 @Service 2 public class UserServiceImpl implements UserService { 3 @Autowired 4 private UserMapper userMapper; 5 6 @Override 7 public User login(String loginname, String password){ 8 return userMapper.findWithLoginnameAndPassword(loginname,password); 9 } 10 }
再创建BookServiceImpl.java类文件，编写如下程序：
1 @Service 2 public class BookServiceImpl implements BookService { 3 @Autowired 4 private BookMapper bookMapper; 5 @Override 6 public List<Book> getAll(){ 7 return bookMapper.findAll(); 8 } 9 }
编写Controller
在com.snow.controller包中创建UserController.java类文件，编写如下程序：
1 @Controller 2 public class UserController { 3 @Autowired 4 private UserService userService; 5 6 @RequestMapping(value = "/login") 7 public ModelAndView login(String loginname, String password, ModelAndView modelAndView, HttpSession httpSession) { 8 User user = userService.login(loginname, password); 9 if (user != null) { 10 httpSession.setAttribute("user", user); 11 modelAndView.setView(new RedirectView("main")); 12 } else { 13 modelAndView.setViewName("error"); 14 } 15 return modelAndView; 16 } 17 }
再创建BookController.java类文件，编写如下程序：
1 @Controller 2 public class BookController { 3 4 @Autowired 5 private BookService bookService; 6 7 @RequestMapping(value = "/main") 8 public String main(Model model) { 9 List<Book> bookList = bookService.getAll(); 10 model.addAttribute("bookList", bookList); 11 return "main"; 12 } 13 }
编写映射文件
在项目的resources目录下创建mapper目录，在目录中创建UserMapper.xml，编写如下内容：
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > 3 <mapper namespace="com.snow.mapper.UserMapper"> 4 <resultMap id="BaseResultMap" type="com.snow.domain.User"> 5 <id column="id" property="id" jdbcType="INTEGER"/> 6 <result column="loginname" property="loginname" jdbcType="VARCHAR"/> 7 <result column="password" property="password" jdbcType="VARCHAR"/> 8 <result column="username" property="username" jdbcType="VARCHAR"/> 9 <result column="phone" property="phone" jdbcType="VARCHAR"/> 10 <result column="address" property="address" jdbcType="VARCHAR"/> 11 </resultMap> 12 <sql id="Base_Column_List"> 13 id, loginname, password, username, phone, address 14 </sql> 15 <select id="findWithLoginnameAndPassword" resultMap="BaseResultMap" parameterType="java.lang.String"> 16 select 17 <include refid="Base_Column_List"/> 18 from tb_user 19 where loginname = #{loginname,jdbcType=VARCHAR} 20 and password = #{password,jdbcType=VARCHAR} 21 </select> 22 </mapper>
再创建BookMapper.xml，编写如下内容：
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" > 3 <mapper namespace="com.snow.mapper.BookMapper"> 4 <resultMap id="BaseResultMap" type="com.snow.domain.Book"> 5 <id column="id" property="id" jdbcType="INTEGER"/> 6 <result column="name" property="name" jdbcType="VARCHAR"/> 7 <result column="author" property="author" jdbcType="VARCHAR"/> 8 <result column="publicationdate" property="publicationdate" jdbcType="DATE"/> 9 <result column="publication" property="publication" jdbcType="VARCHAR"/> 10 <result column="price" property="price" jdbcType="DOUBLE"/> 11 <result column="image" property="image" jdbcType="VARCHAR"/> 12 <result column="remark" property="remark" jdbcType="VARCHAR"/> 13 </resultMap> 14 <sql id="Base_Column_List"> 15 id, name, author, publicationdate, publication, price, image, remark 16 </sql> 17 <select id="findAll" resultMap="BaseResultMap" parameterType="com.snow.domain.Book"> 18 select 19 <include refid="Base_Column_List"/> 20 from tb_book 21 </select> 22 </mapper>
编写页面
在项目的webapp目录下创建images目录，将数据库中书的封面图和页面的背景图放在该目录下：
在项目的webapp目录下，创建base.css文件，编写如下程序：
1 body{ 2 background-image: url(images/backImage.jpg); 3 background-size:cover; 4 }
在项目的webapp目录下，创建login.jsp文件，编写如下程序：
1 <%-- 2 Created by IntelliJ IDEA. 3 User: Dcl_Snow 4 Date: 2019/10/25 5 Time: 10:00 6 To change this template use File | Settings | File Templates. 7 --%> 8 <%@ page contentType="text/html;charset=UTF-8" language="java" %> 9 <html> 10 <head> 11 <title>登录页面</title> 12 <link rel="stylesheet" type="text/css" href="base.css"/> 13 </head> 14 <body> 15 <center> 16 <h3>登录页面</h3> 17 <form action="login" method="post"> 18 <table> 19 <tr> 20 <td><label>登录名：</label></td> 21 <td><input type="text" id="loginname" name="loginname"></td> 22 </tr> 23 <tr> 24 <td><label>密 码：</label></td> 25 <td><input type="password" id="password" name="password"></td> 26 </tr> 27 <tr> 28 <td><input type="submit" value="登录"></td> 29 </tr> 30 </table> 31 </form> 32 </center> 33 </body> 34 </html>
在项目的WEB-INF目录下，创建views目录，在该目录下创建main.jsp文件，编写如下程序：
1 <%@ taglib prefix="C" uri="http://java.sun.com/jsp/jstl/core" %> 2 <%-- 3 Created by IntelliJ IDEA. 4 User: Dcl_Snow 5 Date: 2019/10/25 6 Time: 10:00 7 To change this template use File | Settings | File Templates. 8 --%> 9 <%@ page isELIgnored="false" %> 10 <%@ page contentType="text/html;charset=UTF-8" language="java" %> 11 <html> 12 <head> 13 <title>首页</title> 14 <link rel="stylesheet" type="text/css" href="base.css"/> 15 </head> 16 <body> 17 <center> 18 欢迎[${sessionScope.user.username}] 19 <table border="1"> 20 <tr> 21 <th>书名</th> 22 <th>封面</th> 23 <th>作者</th> 24 <th>价格</th> 25 </tr> 26 <C:forEach items="${requestScope.bookList}" var="book"> 27 <tr> 28 <td>${book.name}</td> 29 <td><img src="images/${book.image}" height="200"></td> 30 <td>${book.author}</td> 31 <td>${book.price}</td> 32 </tr> 33 </C:forEach> 34 </table> 35 </center> 36 </body> 37 </html>
再创建error.jsp文件，编写如下程序：
1 <%-- 2 Created by IntelliJ IDEA. 3 User: Dcl_Snow 4 Date: 2019/10/25 5 Time: 10:00 6 To change this template use File | Settings | File Templates. 7 --%> 8 <%@ page contentType="text/html;charset=UTF-8" language="java" %> 9 <html> 10 <head> 11 <title>错误页面</title> 12 <link rel="stylesheet" type="text/css" href="base.css"/> 13 </head> 14 <body> 15 <center> 16 <h1><font color="red">用户名或密码错误！</font></h1> 17 </center> 18 </body> 19 </html>
配置Tomcat
为项目配置Tomcat后，启动，浏览器访问：http://localhost:8080/)。
登录页面：
输入错误的用户名或密码：
输入正确的用户名和密码：
