1、基于XML形式,将查询的结果放到Map中
/** * 将查询到的用户信息放到Map当中,然后从HashMap中获取用户信息 */ @Test public void GetUserFromMap(){ SqlSession sqlSession = MybatisUtils.SqlSessionManualCommit(); String statement = userNameSpace + "getUserFromMap"; HashMap<String,Object> user = sqlSession.selectOne(statement, 1); sqlSession.close(); System.out.println("map"); System.out.println(user); //目的是为了要注意,从hashMap中获取值,要注意key的大小写 System.out.println(user.get("name")); System.out.println(user.get("NAME")); }
<!-- 将查询的结果放到map当中 --> <select id="getUserFromMap" parameterType="int" resultType="map"> SELECT ID,NAME,AGE FROM USER WHERE ID=#{id} </select>
2、基于注解的方式,将查询的结果放到Map中
@Test public void getUserFromMap(){ SqlSession sqlSession = MybatisUtils.SqlSessionAutoCommit(); UserMapper userMapper=sqlSession.getMapper(UserMapper.class); HashMap<String,Object> userMap=userMapper.getUserFromMap(1); sqlSession.close(); System.out.println(userMap); }
@Select("select id,name,age from user where id=#{id}") public HashMap<String,Object> getUserFromMap(int id);
3、备注声明
以上部分笔者仅仅展示了核心代码,其代码细节的部分,详情请见笔者上传到码云的项目mybatis1