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我有一个奇怪的行为差异，我想了解。我在实体类中有Bean验证注释。我也有一些捕获它们的代码，并将它们格式化为JSON作为REST接口 - 但我认为这不会影响任何内容。我使用Spring和JPA Hibernate。Postgres诉HSQL ConstrainViolationException在春季包装
当我设置HSQL作为我的数据库驱动程序，我可以一个EntityManager #persist调用后直接赶ConstrainViolationException。但是，当我将JDBC驱动程序切换到Postgres时，#persist会抛出一个由RollbackException引发的TransactionSystemException，最后在RollbackException中我可以得到ConstraintViolationException。代码是相同的，我只能切换驱动程序。 #persist方法是@Transactional。
现在我想我可以通过为TransactionSystemExeption添加一个catch并获取两次原因来处理ConstraintViolationException来解决这个问题，但对我来说似乎很奇怪，我需要两个相同的代码的catch子句，具体取决于驱动配置。任何想法或解释？
设置很简单。任何JPA实体在某些字段上具有@NotNull bean约束。然后坚持它是一个事务性的方法。使用HSQL，您将得到如下异常：
javax.validation.ConstraintViolationException: Validation failed for classes [MyEntity] during persist time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
ConstraintViolationImpl{interpolatedMessage='not a well-formed email address', propertyPath=emailAddress, rootBeanClass=class ..., messageTemplate='{org.hibernate.validator.constraints.Email.message}'}
ConstraintViolationImpl{interpolatedMessage='may not be null', propertyPath=password, rootBeanClass=class ..., messageTemplate='{javax.validation.constraints.NotNull.message}'}
]
at org.hibernate.cfg.beanvalidation.BeanValidationEventListener.validate(BeanValidationEventListener.java:161)
at org.hibernate.cfg.beanvalidation.BeanValidationEventListener.onPreInsert(BeanValidationEventListener.java:94)
at org.hibernate.action.EntityIdentityInsertAction.preInsert(EntityIdentityInsertAction.java:160)
at org.hibernate.action.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:65)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273)
at org.hibernate.event.def.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:320)
at org.hibernate.event.def.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:203)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:129)
at org.hibernate.ejb.event.EJB3PersistEventListener.saveWithGeneratedId(EJB3PersistEventListener.java:69)
at org.hibernate.event.def.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:179)
at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:135)
at org.hibernate.event.def.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:61)
at org.hibernate.impl.SessionImpl.firePersist(SessionImpl.java:808)
at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:782)
at org.hibernate.impl.SessionImpl.persist(SessionImpl.java:786)
at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:837)
at sun.reflect.GeneratedMethodAccessor21.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240)
at $Proxy49.persist(Unknown Source)
虽然使用PostgreSQL，您将得到此异常。不要更改任何代码，只需将驱动程序和方言更改为PostgreSQL并捕获异常。
org.springframework.transaction.TransactionSystemException: Could not commit JPA transaction; nested exception is javax.persistence.RollbackException: Error while committing the transaction
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:521)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:393)
at org.springframework.transaction.aspectj.AbstractTransactionAspect.ajc$afterReturning$org_springframework_transaction_aspectj_AbstractTransactionAspect$3$2a73e96c(AbstractTransactionAspect.aj:78)
at EntityService.persist(EntityService.java:82)
...
Caused by: javax.persistence.RollbackException: Error while committing the transaction
at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:93)
at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:512)
... 47 more
Caused by: javax.validation.ConstraintViolationException: Validation failed for classes [MyEntity] during persist time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
ConstraintViolationImpl{interpolatedMessage='not a well-formed email address', propertyPath=emailAddress, rootBeanClass=class MyEntity, messageTemplate='{org.hibernate.validator.constraints.Email.message}'}
ConstraintViolationImpl{interpolatedMessage='may not be null', propertyPath=password, rootBeanClass=class MyEntity, messageTemplate='{javax.validation.constraints.NotNull.message}'}
]
at org.hibernate.cfg.beanvalidation.BeanValidationEventListener.validate(BeanValidationEventListener.java:161)
at org.hibernate.cfg.beanvalidation.BeanValidationEventListener.onPreInsert(BeanValidationEventListener.java:94)
at org.hibernate.action.EntityInsertAction.preInsert(EntityInsertAction.java:178)
at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:72)
at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:273)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:265)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:184)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:321)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:51)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1216)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:383)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:133)
at org.hibernate.ejb.TransactionImpl.commit(TransactionImpl.java:76)
... 48 more
我不能现在就调试休眠源，但我的猜测是，与HSQL，Hibernate是我的过程中使用的代码来执行豆验证之前插入/提交发生PostgreSQL的同时不论是在插入或承诺做。因此，对于HSQL，它只抛出ConstraintViolationException，而对于PostgreSQL，它是一个提交异常，Hibernate将其封装为RollbackException，然后Spring将其作为TransactionSystemException包装。这只是一个猜测。 –
向我们展示代码，实体及其映射，以及例外的堆栈跟踪。我们没有任何水晶球。 –
好的@JBNizet我添加了堆栈跟踪。 –