详细聊聊Mybatis中万能的Map

public interface UserMapper {
    User getUserById2(Map<String,Object> map);
}

<!--    用map后这边参数可以随便写-->
    <insert id="addUser2" parameterType="map" >
        insert into mybatis.user(id, name, pwd) VALUES (#{userid},#{username},#{passWord});
    </insert>

    @Test
    public void addUser2(){
        SqlSession sqlSession=MybatisUtils.getSqlSession();
        UserMapper mapper=sqlSession.getMapper(UserMapper.class);
        Map<String,Object> map=new HashMap<String,Object>();
        map.put("userid",5);
        map.put("username","王五");
        map.put("password","23333");
        mapper.addUser2(map);
        sqlSession.commit();
        sqlSession.close();
    }

public interface UserMapper {
   User getUserById2(Map<String,Object> map);
}

  <select id="getUserById2" parameterType="map" resultType="com.lding.pojo.User">
        select * from mybatis.user where id=#{id} and name=#{name}
    </select>

    @Test
    public void getUserById2() {
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);
        Map<String,Object> map=new HashMap<String,Object>();
        map.put("id",1);
        map.put("name","冷丁");
        User userById = mapper.getUserById2(map);
        System.out.println(userById);
        sqlSession.close();
    }

<select id="findByPriceRange" parameterType="java.util.Map" resultType="com.itlaoqi.mybatis.entity.Goods">

        select * from t_goods

        where

          current_price between #{min}  and #{max}

        order by current_price

        limit 0,#{limt}

    </select>