Caused by: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry ‘张三‘ for key ‘ul_name‘

谁践踏了优雅 2021-09-25 07:40 172阅读 0赞

异常详情

org.springframework.dao.DuplicateKeyException: 
    ### Error updating database.  Cause: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '张三' for key 'ul_name'
    ### The error may involve com.zt.edu.mapper.TeacherMapper.insert-Inline
    ### The error occurred while setting parameters
    ### SQL: INSERT INTO edu_teacher  ( id, name, intro, career, level,  sort,  gmt_create, gmt_modfied )  VALUES  ( ?, ?, ?, ?, ?,  ?,  ?, ? )
    ### Cause: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '张三' for key 'ul_name'
    ; Duplicate entry '张三' for key 'ul_name'; nested exception is java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '张三' for key 'ul_name'
    	at org.springframework.jdbc.support.SQLErrorCodeSQLExceptionTranslator.doTranslate(SQLErrorCodeSQLExceptionTranslator.java:243)
    	at org.springframework.jdbc.support.AbstractFallbackSQLExceptionTranslator.translate(AbstractFallbackSQLExceptionTranslator.java:72)
    	at org.mybatis.spring.MyBatisExceptionTranslator.translateExceptionIfPossible(MyBatisExceptionTranslator.java:73)
    	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:446)
    	at com.sun.proxy.$Proxy88.insert(Unknown Source)
    	at org.mybatis.spring.SqlSessionTemplate.insert(SqlSessionTemplate.java:278)
    	at com.baomidou.mybatisplus.core.override.PageMapperMethod.execute(PageMapperMethod.java:68)
    	at com.baomidou.mybatisplus.core.override.PageMapperProxy.invoke(PageMapperProxy.java:64)
    	at com.sun.proxy.$Proxy95.insert(Unknown Source)
    	at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl.save(ServiceImpl.java:108)
    	at com.baomidou.mybatisplus.extension.service.impl.ServiceImpl$$FastClassBySpringCGLIB$$76535273.invoke(<generated>)
    	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)
    	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:769)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
    	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
    	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:366)
    	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:99)
    	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
    	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.proceed(CglibAopProxy.java:747)
    	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
    	at com.zt.edu.service.impl.TeacherServiceImpl$$EnhancerBySpringCGLIB$$344e9d65.save(<generated>)
    	at com.zt.edu.controller.TeacherController.addTeacher(TeacherController.java:165)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190)
    	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138)
    	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:106)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888)
    	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793)
    	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
    	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040)
    	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943)
    	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
    	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
    	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
    	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:526)
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
    	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
    	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1579)
    	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    	at java.lang.Thread.run(Thread.java:748)
    Caused by: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '张三' for key 'ul_name'
    	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:117)
    	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
    	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
    	at com.mysql.cj.jdbc.ClientPreparedStatement.executeInternal(ClientPreparedStatement.java:953)
    	at com.mysql.cj.jdbc.ClientPreparedStatement.execute(ClientPreparedStatement.java:370)
    	at com.zaxxer.hikari.pool.ProxyPreparedStatement.execute(ProxyPreparedStatement.java:44)
    	at com.zaxxer.hikari.pool.HikariProxyPreparedStatement.execute(HikariProxyPreparedStatement.java)
    	at org.apache.ibatis.executor.statement.PreparedStatementHandler.update(PreparedStatementHandler.java:46)
    	at org.apache.ibatis.executor.statement.RoutingStatementHandler.update(RoutingStatementHandler.java:74)
    	at sun.reflect.GeneratedMethodAccessor132.invoke(Unknown Source)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.apache.ibatis.plugin.Plugin.invoke(Plugin.java:63)
    	at com.sun.proxy.$Proxy131.update(Unknown Source)
    	at org.apache.ibatis.executor.SimpleExecutor.doUpdate(SimpleExecutor.java:50)
    	at org.apache.ibatis.executor.BaseExecutor.update(BaseExecutor.java:117)
    	at org.apache.ibatis.executor.CachingExecutor.update(CachingExecutor.java:76)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.update(DefaultSqlSession.java:198)
    	at org.apache.ibatis.session.defaults.DefaultSqlSession.insert(DefaultSqlSession.java:185)
    	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.lang.reflect.Method.invoke(Method.java:498)
    	at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:433)
    	... 68 more

重点是这几条

Cause: java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '张三' for key 'ul_name'
    Duplicate entry '张三' for key 'ul_name'; nested exception is java.sql.SQLIntegrityConstraintViolationException: Duplicate entry '张三' for key 'ul_name'

SQLIntegrityConstraintViolationException异常翻译过来就是“SQL完整性约束违反异常”

下面谈谈完整性约束，完整性约束其实也就包括以下几种

主要约束分类在开发之中可以使用以下的五种约束进行定义：  
非空约束：如果使用了非空约束的话，则以后此字段的内容不允许设置成null；  
唯一约束：即：此列的内容不允许出现重复；  
主键约束：表示一个唯一的标识，例如：人员ID不能重复，且不能为空；  
检查约束：用户自行编写设置内容的检查条件；  
主-外键约束（参照完整性约束）：是在两张表上进行的关联约束，加入关联约束之后就产生父子的关系

异常：Duplicate entry '张三' for key 'ul\_name'键“ ul\_name”的条目“张三”重复，这显然破环了sql完整性中的唯一约束，**也就是说表中name为张三的条目已经存在了**，经过查看果然已经存在。试着再换个不重复的名字，果不其然添加成功，所以可以断定，再表中name字段设置了UNIQUE。

经过查看SQL语句当时添加了这一行UNIQUE KEY \`uk\_name\` (\`name\`)，也就是将name字段设置了唯一值，并添加了ul\_name索引！！

![20210421095536802.png][]

所以当插入了name中原有的值，就会报错异常！！

[20210421095536802.png]: /images/20210923/7660757dfbc14649b55f91c6cd7389b3.png