严重: Servlet.service() for servlet [spring-mvc] in context with path [/learn] threw exception [Request processing failed; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement] with root cause
com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'admin' for key 'UK_dgxl7aijrr4hq8314exhw407s'
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)

1、MySQLIntegrityConstraintViolationException是指外键出错了

2、Duplicate entry 'admin'for key 'PRIMARY'是指重复了  我的用户名设为唯一了

com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'admin' for key 'UK_dgxl7aijrr4hq8314exhw407s'的更多相关文章

  1. com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '88888888' for key 'PRIMARY'

    严重: Servlet.service() for servlet jsp threw exceptioncom.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityC ...

  2. Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'qingmu' for key 'PRIMARY'

    ### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolatio ...

  3. java PageHelper 分页插件出现 Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Duplicate column name 'Id' 错误

    情景: Mapper.xml定义连表查询,如果sql的字段名中有sql关键字,会导致PageHelper插件出现 com.mysql.jdbc.exceptions.jdbc4.MySQLSyntax ...

  4. com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException 异常

    MySQL完整性约束破坏异常:com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException 在单向多对一关联关系 ...

  5. Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'org_mer_id' in where clause is ambiguous

    ### Error querying database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolatio ...

  6. error：com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException

    问题:同样的代码,只能插入一组值,第二组值插入不了 解决:开始我将app_id作为主键,但很明显,同一个app_id会有不同的index,而同一个index也可能对应不同的app_id,因此只能添加一 ...

  7. com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'dd' in 'where clause'

    今天在使用mysql数据库查找数据的时候报错,错误信息如下: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown co ...

  8. com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure 解决办法

    09:00:30.307 [http-8080-6] ERROR org.hibernate.transaction.JDBCTransaction -JDBC begin failed com.my ...

  9. mysql 数据库问题com.mysql.jdbc.exceptions.jdbc4.CommunicationsException

    本文转自:http://blog.csdn.net/zmzsoftware/article/details/6835604 MySQL第二天早上第一次连接超时报错,解决方法com.mysql.jdbc ...

随机推荐

  1. Sandbox 沙盒

    In computer security, a sandbox is a security mechanism for separating running programs, usually in ...

  2. C# 打开模态对话框 和打开文件夹

    C# 打开另一个窗体,(模态对话框) Form1 frm= new Form1(); //创建对象 DialogResult retServer = frm.ShowDialog(); //模式对话框 ...

  3. Git学习总结四（删除）

    一般情况下,你通常直接在文件管理器中把没用的文件删了,或者用rm命令删了: $ rm test.txt 这个时候,Git知道你删除了文件,因此,工作区和版本库就不一致了,git status命令会立刻 ...

  4. SGU100

    Read integers A and B from input file and write their sum in output file. Input Input file contains ...

  5. H5 坑

    document.addEventListener("touchmove",function(e){e.preventDefault();},false); 防止滑动时整屏页面移动 ...

  6. 【codeforces 801D】Volatile Kite

    [题目链接]:http://codeforces.com/contest/801/problem/D [题意] 给你一个凸多边形的n个点; 然后允许你将每个点移动到距离不超过D的范围内; 要求无论如何 ...

  7. Maven学习总结（9）——使用Nexus搭建Maven私服

    1 . 私服简介 私服是架设在局域网的一种特殊的远程仓库,目的是代理远程仓库及部署第三方构件.有了私服之后,当 Maven 需要下载构件时,直接请求私服,私服上存在则下载到本地仓库:否则,私服请求外部 ...

  8. mybatis源码阅读-执行器Executor(四)

    说明 前面二看到了 sqlSession最终是找到MapperStatement然后委托给Executer执行的 Executer到底做了什么 接口定义 public interface Execut ...

  9. [poj1698]Alice's Chance[网络流]

    [转]原文:http://blog.csdn.net/wangjian8006/article/details/7926040 题目大意:爱丽丝要拍电影,有n部电影,规定爱丽丝每部电影在每个礼拜只有固 ...

  10. 【ACM】hdu_1004_Let the Balloon Rise_201308141026-2

    Let the Balloon RiseTime Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Othe ...