Caused by: org.hibernate.PersistentObjectException: detached entity passed to persist:
Causedby:org.hibernate.PersistentObjectException:detachedentitypassedtopersist:Causedby:org.hibernate.PersistentObjectException:detachedentitypassedtopersist:此异常多出现在Hibernate、JPA级联映射中,在级联保存时频发从异常信息不难看