2023年8月23日
Map的键key转换为全大写
摘要： ```java public static void main(String[] args) { ArrayList> mapArr = new ArrayList(); LinkedHashMap linked = new LinkedHashMap(); linked.put("key1","v 阅读全文
posted @ 2023-08-23 14:28 ElloeStudy 阅读(773) 评论(0) 推荐(0)
mysql合并标签和去重
摘要： ```java select count(DISTINCT object_code) as count from object_tag where tag_name ="test2" SELECT a.unid, a.entname AS "objBindName", a.enttype, a.en 阅读全文
posted @ 2023-08-23 10:23 ElloeStudy 阅读(21) 评论(0) 推荐(0)