缓存identifier of an instance of com.topsec.tss.web.model.event.Event was altered from … to …

JPA外键关联，进行修改外键时出错identifier of an instance of …… was altered from

identifier of an instance of A表 was altered from 2 to 3 

http://bbs.youkuaiyun.com/topics/390534402/ 问题分析帖子

http://blog.youkuaiyun.com/aibisoft/article/details/47999593


获取entityManager对象
@PersistenceContext
private EntityManager entityManager;


调用其clear方法清除缓存再进行保存
entityManager.clear();