注解配置时报错:org.hibernate.MappingException: Unknown entity: net.mingyang.cms.bean.User
org.hibernate.MappingException: Unknown entity: net.mingyang.cms.bean.User at org.hibernate.internal.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:1096) at org.hibernate.internal.SessionImpl.getEntityPersister(SessionImpl.java:1443) at org.hibernate.engine.internal.ForeignKeys.isTransient(ForeignKeys.java:242) at org.hibernate.event.internal.AbstractSaveEventListener.getEntityState(AbstractSaveEventListener.java:511) at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:100) at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:90) at org.hibernate.internal.SessionImpl.fireSaveOrUpdate(SessionImpl.java:684) at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:676) at org.hibernate.internal.SessionImpl.saveOrUpdate(SessionImpl.java:671) at net.mingyang.cms.dao.hibernate.UserDaoHibernate.updateUser(UserDaoHibernate.java:34) at net.mingyang.cms.service.impl.UserServiceImpl.updateUser(UserServiceImpl.java:50) at net.mingyang.cms.controller.UserController.indexAction(UserController.java:61) . . . . . .
可能的原因:
1、配置实体类时为@Entity导包时错误的导入了 rg.hibernate.annotations.Entity ,应该更改为import javax.persistence.Entity;
2、applicationContext.xml中配置实体扫描时路径出错, 比如:实体类存放在net.mingyang.cms.bean包下,则路径就要配为
<property name="packagesToScan" value="net.mingyang.cms.*"/>
而不是
<property name="packagesToScan" value="net.mingyang.cms.bean.*"/>
也就是说配置映射目录要比实际少一层。
或者直接使用
<property name="annotatedClasses"> <list> <value>net.mingyang.cms.bean.User</value> ...... </list> </property>
指定相应的实体类(实体类较少时)。