Spring -Mybatis整合

核心：spring整合mybatis   spring-dao.xml

<?xml version="1.0" encoding="UTF8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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/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">
        <!--   创建数据源（数据库信息）     -->
        <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
            <property name="url" value="jdbc:mysql://localhost:3306/mybatis?serverTimezone=GMT%2B8"/>
            <property name="username" value="root"/>
            <property name="password" value="123456789"/>
        </bean>
        <!-- 建立工场 -->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="datasource"/>
　　　　　　　　//mybatis的配置文件
            <property name="configLocation" value="classpath:mybatis-config.xml"/>
　　　　　　　　//配置每一个mapper.xml
            <property name="mapperLocations" value="classpath:com/zxy/mapper/UserMapper.xml"/>
        </bean>
        <!--建立一个sqlSession的模板类（在sqlSession和用户之间多一层给每一个用户发送sqlSession）  -->
        <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
            <constructor-arg index="0" ref="sqlSessionFactory"/>
        </bean>

</beans>

 applicationContext.xml

<?xml version="1.0" encoding="UTF8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       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/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">
　　　　　　//整合所有的spring配置文件  实现核心配置不需要改动  分工明确
        <import resource="spring-dao.xml"/>

        <!--   给每一个mapper建立一个sqlSession连接     -->
        <bean id="userMapper" class="com.zxy.mapper.UserMapperImpl3">
                <property name="sqlSession" ref="sqlSession"/>
        </bean>

</beans>

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>
　　<!--在整合之后，  一般mybatis核心文件中方   别名 和  setting配置 -->
    <typeAliases>
        <typeAlias type="com.zxy.pojo.User" alias="User"/>
    </typeAliases>


</configuration>

UserMapper.java

package com.zxy.mapper;

import com.zxy.pojo.User;
import java.util.List;

public interface UserMapper {
    //查询用户
    List<User> selectUser();
}

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">

<mapper namespace="com.zxy.mapper.UserMapper">
    <select id="selectUser" parameterType="User" resultType="User">
        select * from mybatis.user;
    </select>
</mapper>

UserMapperImpl3.java  (实现类)

package com.zxy.mapper;

import com.zxy.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;

import java.util.List;

public class UserMapperImpl3 implements UserMapper{
    private SqlSessionTemplate sqlSession;
　　//获取sqlSession的实例
    public void setSqlSession(SqlSessionTemplate sqlSession) {
        this.sqlSession = sqlSession;
    }

    @Override
    public List<User> selectUser() {
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        return mapper.selectUser();
    }
}

Test:

import com.zxy.mapper.UserMapper;
import com.zxy.pojo.User;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class MyTest {
    @Test
    public void test01(){
        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
        UserMapper userMapper = context.getBean("userMapper", UserMapper.class);
        for (User user : userMapper.selectUser()) {
            System.out.println(user);
        }
    }
}