不能吧，最后一次它又来了--整合Mybatis和事务管理（“最易懂得Spring学习”）（二）

<?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: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
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--DataSource:使用Spring的数据源替换Mybatis的配置:c3p0  dbcp  druid
    这里使用Spring提供的JDBC.
    这里使用了之后我们就可以把mybatis-config.xml中的去掉了
    -->
    <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=false&amp;useUnicode=true&amp;characterEncoding=UTF-8"/>
        <property name="username" value="root"/>
        <property name="password" value="123456"/>
    </bean>
    <!--sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!--绑定上方所写数据源-->
        <property name="dataSource" ref="datasource"/>
        <!--绑定mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-config.xml"/>
        <!--这样的话原来的注册mapper也就不需要了-->
        <property name="mapperLocations" value="classpath:com/hxl/mapper/*.xml"/>
    </bean>
    <!--SqlSessionTemplate就是我们使用的sqlSession-->
    <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">
        <!--只能使用构造器注入sqlSessionFactory，因为它没有set方法-->
        <constructor-arg index="0" ref="sqlSessionFactory"/>
    </bean>
    <!--注入到spring中-->
    <bean id="userMapper" class="com.hxl.mapper.UserMapperImpl">
        <property name="sqlSession" ref="sqlSession"/>
    </bean>
</beans>

package com.hxl.mapper;
import com.hxl.pojo.User;
import org.mybatis.spring.SqlSessionTemplate;
import java.util.List;
public class UserMapperImpl implements UserMapper{
    //我们的所有操作，在原来都是用sqlSession来执行，现在都使用SqlSessionTemplate
    private SqlSessionTemplate sqlSession;
    public void setSqlSession(SqlSessionTemplate sqlSession) {
        this.sqlSession = sqlSession;
    }
    public List<User> selectUser() {
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        return mapper.selectUser();
    }
}

<?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: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
        https://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/aop
        https://www.springframework.org/schema/aop/spring-aop.xsd">
    <import resource="spring-dao.xml"/>
    <!--注入到spring中-->
    <bean id="userMapper" class="com.hxl.mapper.UserMapperImpl">
        <property name="sqlSession" ref="sqlSession"/>
    </bean>
</beans>

@Test
public void test2(){
    ApplicationContext context = new ClassPathXmlApplicationContext("spring-dao.xml");
    UserMapper userMapper = context.getBean(UserMapper.class);
    for (User user : userMapper.selectUser()) {
        System.out.println(user);
    }
}

package com.hxl.mapper;
import com.hxl.pojo.User;
import org.apache.ibatis.session.SqlSession;
import org.mybatis.spring.support.SqlSessionDaoSupport;
import java.util.List;
public class UserMapperImpl2 extends SqlSessionDaoSupport implements UserMapper{
    public List<User> selectUser() {
        SqlSession sqlSession = getSqlSession();
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        return mapper.selectUser();
    }
}

<!--对应的第二种方法-->
<bean id="userMapper2" class="com.hxl.mapper.UserMapperImpl2">
    <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
</bean>

@Test
public void test2(){
    ApplicationContext context = new ClassPathXmlApplicationContext("spring-dao.xml");
    UserMapper userMapper = context.getBean("userMapper2",UserMapper.class);
    for (User user : userMapper.selectUser()) {
        System.out.println(user);
    }
}