Spring:整合Mybatis

//接口
public interface UserMapper {
    public List<User> selectUser();
}

<!--mapper.xml-->
<?xml version="1.0" encoding="UTF8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!--namespace=绑定一个对应的Dao/Mapper接口-->
<mapper namespace="com.zh.mapper.UserMapper">
    <select id="selectUser" resultType="user">
       select*from mybatis.user
    </select>

</mapper>

<!--sqlSessionFactory-->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <!--绑定mybatis配置文件-->
    <property name="configLocation" value="classpath:mybatis-configure.xml"/>
    <!--注册mapper-->
    <property name="mapperLocations" value="classpath:com/zh/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>

//整合配置文件
<?xml version="1.0" encoding="UTF8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!--DataSource:使用Spring的数据源替换mybatis配置
 这里使用spring提供的jdbc:org.springframework.jdbc.datasource
 -->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
        <property name="password" value="zh123456"/>
        <property name="url" value="jdbc:mysql://localhost:3306/mybatis?useSSL=false&amp;useUnicode=true&amp;characterEncoding=Utf8&amp;serverTimezone=Asia/Shanghai"/>
        <property name="username" value="root"/>
    </bean>

    <!--sqlSessionFactory-->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <!--绑定mybatis配置文件-->
        <property name="configLocation" value="classpath:mybatis-configure.xml"/>
        <!--注册mapper-->
        <property name="mapperLocations" value="classpath:com/zh/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>
    <bean id="userMapperImpl" class="com.zh.mapper.UserMapperImpl">
        <property name="sqlSession" ref="sqlSession"/>
    </bean>

</beans>

//实现类 方法一：
public class UserMapperImpl implements UserMapper  {
    //在之前我们的所有操作都是用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();
    }
}

//实现类方法二
public class UserMapperImpl2 extends SqlSessionDaoSupport implements UserMapper {
    public List<User> selectUser() {
        return getSqlSession().getMapper(UserMapper.class).selectUser();
    }
}

//对应配置文件
 <bean id="userMapperImpl2" class="com.zh.mapper.UserMapperImpl2">
   <property name="sqlSessionFactory" ref="sqlSessionFactory"/>
    </bean>

整合思路：

首先创建datasource在创建SQL session factory，传入datasource ，
在创建sqlSessionTemplate，传入sqlsessionFactory，
最后usermapperimpl传入sqlsessiontemplate