mybatis 返回List

mybatis 返回List<Map>

 

1. 直接通过mapper接口返回，不经过mapper.xml

 

    @Select(
            "select road_type,count(*) from amap_main_channel WHERE pcode = #{pcode} group by road_type"
    )
    List<Map> queryRoadTypeByPcode(@Param("pcode")String adcode);

 

注： 要定义返回类型List<Map>,否则会报错

 

2. 通过mapper.xml返回

 

mapper定义
 
List queryAmapCount(@Param("record") ReqRoadInfoQo record);
 
mapper.xml定义
 
<select id="queryAmapCount" resultType="java.util.Map">