Mybatis结果集映射与生命周期详细介绍

<?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.decade.mapper.UserMapper">
    <resultMap id="userInfo" type="com.decade.entity.User2">
        <result property="userId" column="id" jdbcType="VARCHAR"/>
        <result property="name" column="name" jdbcType="VARCHAR"/>
        <result property="sex" column="sex" jdbcType="VARCHAR"/>
        <result property="age" column="age" jdbcType="INTEGER"/>
    </resultMap>
    <select id="getUserInfoById" resultMap="userInfo">
        select * from t_decade_user where id = #{userId} and name =  #{name};
    </select>
</mapper>

package com.decade.mapper;
import com.decade.entity.User2;
import org.apache.ibatis.annotations.Param;
import java.util.List;
public interface UserMapper {
    List<User2> getUserInfoById(@Param("userId") String userId, @Param("name") String name);
}

import com.decade.entity.User2;
import com.decade.mapper.UserMapper;
import com.decade.utils.MybatisUtils;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;
import java.util.List;
public class UserDaoTest {
    @Test
    public void test2() {
        // 第一步：获取sqlSession对象
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        try {
            UserMapper userDao = sqlSession.getMapper(UserMapper.class);
            List<User2> userList = userDao.getUserInfoById("005", "刘亦菲");
            // 循环输出查询到的user信息
            userList.forEach(System.out::println);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            // 关闭sqlSession
            sqlSession.close();
        }
    }
}