org.hibernate.exception.ConstraintViolationException: could not insert解决

环境

 

MyEclipse 8.6+Hibernate3.2

 

问题

 

使用Hibernate出现如下错误:

 

org.hibernate.exception.ConstraintViolationException: could not insert: [com.lo.entities.Address]at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:94)at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:64)at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2176)at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2656)at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:71)at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:279)at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:321)at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:117)at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:535)at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:527)at org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:241)at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:292)at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:240)at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:193)at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:320)at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:266)at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:243)at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:193)at org.hibernate.engine.Cascade.cascade(Cascade.java:154)at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:479)at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:357)at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:204)at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:130)at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:210)at org.hibernate.event.def.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:56)at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:195)at org.hibernate.event.def.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:50)at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:93)at org.hibernate.impl.SessionImpl.fireSave(SessionImpl.java:563)at org.hibernate.impl.SessionImpl.save(SessionImpl.java:551)at org.hibernate.impl.SessionImpl.save(SessionImpl.java:547)at com.ol.entities.LoTest.testSave(LoTest.java:56)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)at java.lang.reflect.Method.invoke(Method.java:597)at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)at org.junit.runners.ParentRunner.run(ParentRunner.java:236)at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '1' for key 'user_id'at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)at java.lang.reflect.Constructor.newInstance(Constructor.java:513)at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)at com.mysql.jdbc.Util.getInstance(Util.java:386)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1039)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4096)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4028)at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2490)at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2651)at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2683)at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2144)at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2444)at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2362)at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2347)at org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:94)at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:57)... 60 more

 

解决

 

不能插入考虑是否违法约束。比如我在配置文件中添加了唯一约束，插入多条数据就会出现问题。

<many-to-one name="user" column="user_id" unique="true" cascade="save-update"></many-to-one>          

 

参考资料

 

http://www.iteye.com/problems/38870

 

总结

 

不能插入数据就要考虑是否违反约束。比如唯一、不能为空却插入空值，插入的数据不在允许的值内，外键约束错误等等。