学步园

控制台打印：

relayStationIds--------------322,321,320,319,<br /> ids[0]--------------322<br /> id[0]-------------322<br /> 2011-5-10 17:00:46 org.apache.struts.chain.commands.AbstractExceptionHandler execute<br /> 警告: Unhandled exception<br /> org.springframework.orm.hibernate3.HibernateSystemException: Unknown entity: java.lang.Long; nested exception is org.hibernate.MappingException: Unknown entity: java.lang.Long<br /> ...<br /> ...<br /> Caused by: org.hibernate.MappingException: Unknown entity: java.lang.Long<br /> ...<br /> ...<br /> ... 65 more<br /> 2011-5-10 17:00:46 org.apache.struts.chain.commands.ExceptionCatcher postprocess<br /> 警告: Exception from exceptionCommand 'servlet-exception'<br /> org.springframework.orm.hibernate3.HibernateSystemException: Unknown entity: java.lang.Long; nested exception is org.hibernate.MappingException: Unknown entity: java.lang.Long<br /> ...<br /> ...<br /> Caused by: org.hibernate.MappingException: Unknown entity: java.lang.Long<br /> ...<br /> ...<br /> ... 65 more

报异常的代码：

public void deleteRelayStationById(long id) throws GISException {<br /> this.getHibernateTemplate().delete(new Long(id));</p> <p> }

解决方法：传入实体对象

public void deleteRelayStationById(long id) throws GISException {<br /> RelayStation rs = new RelayStation();<br /> rs.setRelayStationId(new Long(id));<br /> this.getHibernateTemplate().delete(rs);<br /> }

明显可以看出，HibernateTemplate是通过删除对象的方式来删除的，简单的传入一个属性，就会报以上异常。

因此需要将属性set到实体对象中，然后通过在delete（）方法中传入实体对象即可实现删除。