JPA:detached entity passed to persist-白红宇

                         
Caused by: org.hibernate.PersistentObjectException: detached entity passed to persist: com.example.entity.UserInfo
    
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:
124
)
    
at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:
58
)
    
at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:
778
)
    
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:
751
)
    
at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:
756
)
    
at org.hibernate.jpa.spi.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:
1146
)
    
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
57
)
    
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
43
)
    
at java.lang.reflect.Method.invoke(Method.java:
606
)
    
at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:
344
)
    
at com.sun.proxy.$Proxy44.persist(Unknown Source)
    
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
57
)
    
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
43
)
    
at java.lang.reflect.Method.invoke(Method.java:
606
)
    
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:
294
)
    
at com.sun.proxy.$Proxy44.persist(Unknown Source)
    
at com.example.service.impl.UserInfoServiceImpl.saveUser(UserInfoServiceImpl.java:
23
)
    
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
57
)
    
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
43
)
    
at java.lang.reflect.Method.invoke(Method.java:
606
)
    
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:
503
)
    
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:
478
)
    
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:
460
)
    
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:
179
)
    
at org.springframework.transaction.interceptor.TransactionInterceptor$
1
.proceedWithInvocation(TransactionInterceptor.java:
99
)
    
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:
281
)
    
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:
96
)
    
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:
179
)
    
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:
136
)
    
... 
81
common frames omitted
        
      
产生这个现象的原因是：程序里面显示的微UserInfo这个对象设置的id的值，然而，实体类上面，注解处又标记了主键的生成策略，因此产生冲突。去掉之一即可。
本文转自 w156445045 51CTO博客，原文链接：http://blog.51cto.com/enetq/1825861，如需转载请自行联系原作者