EJB持久层cannotsimultaneouslyfetchmultiplebags异常的解决    病理特征：Causedby:org.hibernate.HibernateException:cannotsimultaneouslyfetchmultiplebags，    堆栈信息：org.springframework.beans.factory.BeanCreationException:Errorcreatingbeanwithname'initSystemDataBySpringListeren':Injecti...