学完SSM就要整合一下嘛，
开始：
1、新建maven项目：
2、先导入springmvc的依赖包
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>5.2.2.RELEASEversion>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>jstlartifactId>
<version>1.2version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>4.0.1version>
<scope>providedscope>
dependency>
2.1再导入mybatis
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.5.3version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>2.0.2version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>5.2.2.RELEASEversion>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>8.0.19version>
dependency>
3，创建包，分别为pojo，controller，service，mapper，utile这五个层，根据个人增加多少个无所谓
4,先在pojo层创建一个类作为mybatis的映射类名为UserPojo
package com.ssmtest.pojo; public class UserPojo { private int id; private String username; private String password; public UserPojo() { } public UserPojo(int id, String username, String password) { this.id = id; this.username = username; this.password = password; } public int getId() { return id; } public void setId(int id) { this.id = id; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } @Override public String toString() { return "UserPojo{" + "id=" + id + ", username='" + username + '\'' + ", password='" + password + '\'' + '}'; } }
5、mapper层：
UserMapper接口：
package com.ssmtest.mapper; import com.ssmtest.pojo.UserPojo; import org.apache.ibatis.annotations.Param; import java.util.List; public interface UserMapper { //增 int insertUser(UserPojo user); //删 int deletUser(@Param("userid") int id); //改 int updateUser(UserPojo user); //查 UserPojo selectUser(@Param("userid")int id); //查看全部 ListselectUserAll(); }
UserMapper.xml:
xml version="1.0" encoding="UTF-8" ?>
DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ssmtest.mapper.UserMapper">
<insert id="insertUser" parameterType="userpojo">
insert into mybatis.login_user(id,username, password) values (#{id},#{username},#{password});
insert>
<delete id="deletUser" parameterType="_int">
delete from mybatis.login_user where username = #{userid}
delete>
<update id="updateUser" parameterType="userpojo">
update mybatis.user set name=#{username},pwd=#{password} where id=#{id};
update>
<select id="selectUser" parameterType="_int">
select * from mybatis.login_user where id=#{userid}
select>
<select id="selectUserAll" resultType="userpojo">
select * from mybatis.login_user
select>
mapper>
mybatis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.ssmtest.pojo"/>
typeAliases>
<mappers>
<mapper resource="com/ssmtest/mapper/UserMapper.xml"/>
mappers>
configuration>
5.1、先创建一个总的spring文件名为applicationContext：
注意一定要点Create new application context，要不然不能汇总，别的spring配置文件不能相互使用
5.2、创建db.properties数据库的配置文件
driver=com.mysql.cj.jdbc.Driver url=jdbc:mysql://localhost:3306/mybatis?useSSL=true&UseUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC user=自己的账号 pass=自己的密码
5.3、创建springmapper配置文件：
一定要加入到刚才的applicationContext里
配置文件：
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
http://www.springframework.org/schema/context/spring-context.xsd">
<context:property-placeholder location="classpath:db.properties"/>
<context:component-scan base-package="com.ssmtest.mapper"/>
<bean class="org.springframework.jdbc.datasource.DriverManagerDataSource" id="dataSource">
<property name="driverClassName" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${user}"/>
<property name="password" value="${pass}"/>
bean>
<bean class="org.mybatis.spring.SqlSessionFactoryBean" id="sqlSessionFactory">
<property name="dataSource" ref="dataSource"/>
<property name="configLocation" value="classpath:Mybatisconfig.xml"/>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.ssmtest.mapper"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
bean>
beans>
6，配置service层：
创建UserService接口：
package com.ssmtest.service; import com.ssmtest.pojo.UserPojo; import java.util.List; public interface UserService { //增 int insertUser(UserPojo user); //删 int deletUser(int id); //改 int updateUser(UserPojo user); //查 UserPojo selectUser(int id); //查看全部 ListselectUserAll(); }
实现UserService接口:
package com.ssmtest.service; import com.ssmtest.mapper.UserMapper; import com.ssmtest.pojo.UserPojo; import java.util.List; public class UserServicelmpl implements UserService { //调用mapper层 private UserMapper userMapper; public void setUserMapper(UserMapper userMapper) { this.userMapper = userMapper; } public int insertUser(UserPojo user) { return userMapper.insertUser(user); } public int deletUser(int id) { return userMapper.deletUser(id); } public int updateUser(UserPojo user) { return userMapper.updateUser(user); } public UserPojo selectUser(int id) { return userMapper.selectUser(id); } public ListselectUserAll() { return userMapper.selectUserAll(); } }
配置service层的spring配置文件：
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
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.ssmtest.service"/>
<bean class="com.ssmtest.service.UserServicelmpl" id="UserServicelmpl">
<property name="userMapper" ref="userMapper"/>
bean>
beans>
测试一下，看一下spring整合mybatis是否成功：
先在applicationContext.xml中导入springservice和springmapper文件：
测试：
结果：
查出来了，说明spring整合mybatis成功，就剩下整合springmvc了
7，Controller层：
先把项目改查web项目：
配置web.xml文件：
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">
<servlet>
<servlet-name>SSMTESTservlet-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>SSMTESTservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
web-app>
新建springmvc配置文件：
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:p="http://www.springframework.org/schema/p"
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">
<context:component-scan base-package="com.ssmtest.controller"/>
<mvc:annotation-driven/>
<mvc:default-servlet-handler/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp"/>
beans>
在配置UserController类
package com.ssmtest.controller; import com.ssmtest.pojo.UserPojo; import com.ssmtest.service.UserService; 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.RequestMapping; import java.util.List; @Controller public class UserController { //调用service层 @Autowired @Qualifier("UserServicelmpl") private UserService userService; @RequestMapping("/hello") public String hello(Model model){ ListuserPojos = userService.selectUserAll(); model.addAttribute("hello",userPojos); return "hello"; } }
在idea中添加lib，springmvc支持的jar包这样才能启动成功：
测试：
成功!