Hibernate之deleted object would be re-saved by casc

在Hibernate中，删除存在关联关系的一个对象时，会出现 org.hibernate.ObjectDeletedException: deleted object would be re-saved by cascade (remove deleted object from associations)这个异常 

解决方案如下： 
方法1 删除Set方的cascade 
方法2 解决关联关系后，再删除 : 
//移除关联关系 
webSite.getTemplates().remove(template); 
//删除 
templateService.delete(template); 
方法3 在many-to-one方增加cascade 但值不能是none 
参考，http://www.blogjava.net/crazycy/archive/2006/06/24/54939.html