Spring+SpringMVC+Mybatis整合(XML方式)

最终工程目录结构：

jar包
spring包（我是把整个全放进去了------spring-framework-5.0.0.RELEASE）、数据库驱动包、mybatis包、mybatis-spring包、commons-pool、commons-dbcp
user.sql

DROP TABLE IF EXISTS `user`;
CREATE TABLE `user` (
  `id` int(10) NOT NULL,
  `username` varchar(255) DEFAULT NULL,
  `address` varchar(255) DEFAULT NULL,
  `sex` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of user
-- ----------------------------
INSERT INTO `user` VALUES ('1', 'yangdong', 'sadas', 'asd');

Web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
  <display-name>Three</display-name>
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    <!-- ContextLoaderListener监听器的作用就是启动Web容器时，自动装配ApplicationContext的配置信息。 -->
  </listener>
   <context-param>  
        <param-name>contextConfigLocation</param-name>  
        <param-value>classpath:config/applicationContext.xml</param-value>  
    </context-param>


    <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:config/springmvc.xml</param-value>  
        </init-param>  
        <load-on-startup>1</load-on-startup>  
    </servlet>  

    <!-- 映射交给SpringMVC的dispatcherServlet来处理 -->  
    <servlet-mapping>  
        <servlet-name>dispatcherServlet</servlet-name>  
        <url-pattern>/</url-pattern>  
    </servlet-mapping>    


</web-app>

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"  
    xmlns:context="http://www.springframework.org/schema/context"  
    xmlns:tx="http://www.springframework.org/schema/tx"  
    xmlns:aop="http://www.springframework.org/schema/aop"
    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/spring-tx.xsd
        http://www.springframework.org/schema/aop
    http://www.springframework.org/schema/aop/spring-aop.xsd">  

	<!-- 数据源，使用dbcp -->
	<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close">
        <property name="username" value="root"></property>  
        <property name="password" value="123456"></property>  
        <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>  
        <property name="url" value="jdbc:mysql://localhost:3306/ssm"></property> 
		<property name="maxActive" value="10" />
		<property name="maxIdle" value="5" />
	</bean>


	<!-- sqlSessinFactory -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<!-- 加载mybatis的配置文件 -->
		<property name="configLocation" value="classpath:config/SqlMapConfig.xml" />
		<!-- 数据源 -->
		<property name="dataSource" ref="dataSource" />
	</bean>
	
	<!-- 原始dao接口 -->
	
	<bean id="userDao" class="dao.UserDaoImpl">
		<property name="sqlSessionFactory" ref="sqlSessionFactory"/>
	</bean>
	

	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<!-- 指定扫描的包名 
		如果扫描多个包，每个包中间使用半角逗号分隔
		-->
		<property name="basePackage" value="mapper"/>
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
		
	</bean>
</beans>  

springmvc.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"  
    xmlns:tx="http://www.springframework.org/schema/tx"  
    xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd  
        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/spring-tx.xsd">  

    <!-- 配置自动扫描包 -->  
       <context:component-scan base-package="test" />
       <context:component-scan base-package="dao" />
    <!-- 配置视图解析器 -->  
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
        <property name="prefix" value="/WEB-INF/views/"></property>  
        <property name="suffix" value=".jsp"></property>  
    </bean>
    <!--使用默认的Servlet来响应静态文件-->   
    <mvc:default-servlet-handler/> 

           <!--  
           <mvc:annotation-driven>会自动注册
           RequestMappingHandlerMapping与RequestMappingHandlerAdapter两个Bean,
           这是Spring MVC为@Controller分发请求所必需的，并且提供了数据绑定支持，
           -->              
    <mvc:annotation-driven/>  

</beans>

SqlMapConfig.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>

	
	
	<!-- 加载 映射文件 -->
	<mappers>
		<mapper resource="mapper/UserMapper.xml"/>
	</mappers>
	
</configuration>

User.java

package po;

public class User {
	private int id;
	private String username;// 用户姓名
	private String sex;// 性别
	private String address;// 地址
			
	
	@Override
	public String toString() {
		return "User [id=" + id + ", username=" + username + ", sex=" + sex + ", address=" + address + "]";
	}
	
	
	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 getSex() {
		return sex;
	}
	public void setSex(String sex) {
		this.sex = sex;
	}
	public String getAddress() {
		return address;
	}
	public void setAddress(String address) {
		this.address = address;
	}
	
}

UserMapper.xml

<?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">

<!-- namespace命名空间，作用就是对sql进行分类化管理，理解sql隔离 
注意：使用mapper代理方法开发，namespace有特殊重要的作用
-->
<mapper namespace="test">


	<select id="findUserById" parameterType="int" resultType="po.User">
		SELECT * FROM USER WHERE id=#{value}
	</select>
	
	
</mapper>

UserDao.java

package dao;

import org.springframework.stereotype.Repository;

import po.User;
@Repository
public interface UserDao {
	
	//根据id查询用户信息
	public User findUserById(int id) throws Exception;
	
	

}

UserDaoImpl.java

package dao;

import org.apache.ibatis.session.SqlSession;
import org.mybatis.spring.support.SqlSessionDaoSupport;

import po.User;

public class UserDaoImpl extends SqlSessionDaoSupport implements UserDao {

	@Override
	public User findUserById(int id) throws Exception {
		//继承SqlSessionDaoSupport，通过this.getSqlSession()得到sqlSessoin
		SqlSession sqlSession = this.getSqlSession();

		User user = sqlSession.selectOne("test.findUserById", id);

		return user;

	}
}

Test.java

package test;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

import dao.UserDao;
import po.User;

@Controller
public class Test {
	@Autowired
	private UserDao dao;
	
	
	@RequestMapping("/aa")
	public void testFindUserById() throws Exception {
		
		
		
		//调用userDao的方法
		User user = dao.findUserById(1);
		
		System.out.println(user);
		
	}
	
}