这篇文章主要讲解了“mybatis返回类型map时怎么把key大写转为小写”，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习“mybatis返回类型map时怎么把key大写转为小写”吧！
亲测：
SELECT DEPTNO as "deptno",DEPTNAME,DEPTGRADE,PARENTDEPT FROM VMGR_DEPT ORDER BY DEPTGRADE,DEPTNO
别人案例：
<select id="selectBlogRetHashMap" parameterType="int" resultType="map"> SELECT id AS "id", title AS "title", content AS "content" FROM Blog WHERE id = #{id} </select>纯java实现方法(推荐)：
public class Snippet {public static Map<String, Object> transformUpperCase(Map<String, Object> orgMap) {Map<String, Object> resultMap = new HashMap<>(); if (orgMap == null || orgMap.isEmpty()) {return resultMap;} Set<String> keySet = 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 id="queryMaxPriceAAndUser" parameterType="java.lang.String" resultType="java.util.HashMap"> SELECT A.SELL_PRICE as "price", B.USER_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 </select>感谢各位的阅读，以上就是“mybatis返回类型map时怎么把key大写转为小写”的内容了，经过本文的学习后，相信大家对mybatis返回类型map时怎么把key大写转为小写这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是编程网，小编将为大家推送更多相关知识点的文章，欢迎关注！
