com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'admin' for key 'UK_dgxl7aijrr4hq8314exhw407s'

本文转载自查看原文 2017-11-30 10:01 3433

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

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猜您在找 MySQL外键约束冲突异常：com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot add or update a child row: a foreign key constraint fails (...) MySQLIntegrityConstraintViolationException: Duplicate entry mysql Duplicate entry '9223372036854775807' for key 'PRIMARY' mysql报错Duplicate entry '1' for key 'PRIMARY' com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was too long; max key length is 767 bytes com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was too long; max key length is 1000 bytes com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Public Key Retrieval is not allowed java PageHelper 分页插件出现 Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Duplicate column name 'Id' 错误 Duplicate entry * for key * com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException