【Mybatis】MyBatis查询，返回值Map或List<Map>

1.返回值Map

• mapper.xml

<select id="selectUserMapLimitOne" resultType="java.util.HashMap">  
    select id,name  
    from  
    user order by id desc limit 1  
</select> 

• 接口定义

    /** 
     * 获取仅含一个的map（map的size=字段个数） 
     * @return 
     */  
    Map<String,Object> selectUserMapLimitOne();  

2. 返回List

• mapper.xml

    <select id="selectUserMapList" resultType="java.util.HashMap">  
        select id,name from  
        user order by id desc limit 2  
    </select>  

• 接口定义

        /** 
         * 获取map list 
         * @return 
         */  
        List<Map<String,Object>> selectUserMapList();