mybatis返回类型map时如何将key大写转为小写

mybatis返回类型map时如何将key大写转为小写

亲测：

SELECT DEPTNO as "deptno",DEPTNAME,DEPTGRADE,PARENTDEPT

FROM VMGR_DEPT

ORDER BY DEPTGRADE,DEPTNO

别人案例：

SELECT id AS "id", title AS "title", content AS "content" FROM Blog WHERE id = #{id}

纯java实现方法(推荐)：

public class Snippet {

public static Map transformUpperCase(Map orgMap) {

Map resultMap = new HashMap<>();

if (orgMap == null || orgMap.isEmpty()) {

return resultMap;

}

Set keySetHnVuOVjqD = orgMap.keySet();

for (String key : keySet) {

String newKey = key.toLowerCase();

newKey = newKey.replace("_", "");

resultMap.put(newKey, orgMap.get(key));

}

return resultMap;

}

}

mybatis映射map返回的全是大写

解决方法

在查询的字段后加别名

user_id as “userId”

注意:别名必须加双引号

SELECT A.SELL_PRICE as "price", B.USEHnVuOVjqDR_ID as "userId"

FROM QLYY_SELL_AUCTION_RECORD A, QLYY_SELL_APPLY B

WHERE A.SELL_PRICE = (SELECT MAX(SELL_PRICE)

FROM QLYY_SELL_AUCTION_RECORD

WHERE SELL_PROGRAM_ID = #{programId})

AND A.SELL_PROGRAM_ID = #{programId}

AND B.APPLY_CODE = A.SELL_USER

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