2022年2月24日
Executing an update/delete query; nested exception is javax.persistence.TransactionRequiredException: Executing an update/delete query ------------ 关于mysql事物回滚的方法
摘要： 关于我出现问题所在： # 首先是在Dao中 @Modifying @Query(value = "delete from user_role where uid in (SELECT uid from user_info where username = ?1)", nativeQuery = tr 阅读全文
posted @ 2022-02-24 17:15 樱花颂 阅读(1309) 评论(0) 推荐(0)
Integer ? String.valueOf() ? ().toString() ? 简明对比
摘要： String uid1 = "1"; Integer uid2 = 1; System.out.println(uid2.toString() == uid1); System.out.println(String.valueOf(uid2) == uid1); System.out.println 阅读全文
posted @ 2022-02-24 09:54 樱花颂 阅读(35) 评论(0) 推荐(0)