Mybatis mysql json 返回map类型乱码 

代码如下：

 

  <select id="select" resultType="java.util.HashMap" >
    SELECT
	    JSON_UNQUOTE( JSON_EXTRACT( t.ext, '$.name' ) ) AS NAME,
	    JSON_UNQUOTE( JSON_EXTRACT( t.ext, '$.age' ) ) AS age 
    FROM
    	t_table
  </select >



List<Map<String, Object>> select();




   

原因：mysql 解析后的json mybatis 识别为了object类型所以造成了乱码

解决方案构建临时表：

 <select id="select" resultType="java.util.HashMap" >
    select name,age from (
        SELECT
	        JSON_UNQUOTE( JSON_EXTRACT( t.ext, '$.name' ) ) AS name,
	        JSON_UNQUOTE( JSON_EXTRACT( t.ext, '$.age' ) ) AS age 
        FROM
        	t_table
    ) t
  </select >