您不必关闭Session和EntityManger，在hibernate中实际上是hibernate Session。调用unwarp会传递给你底层Session。所以关闭其中一个是好的。

关于连接泄漏，看看我的答案以下问题，也许这是同一个问题。

I have code that looks like this.

 this.entityManager = AppFactory.instance().getEntityManagerFactory().createEntityManager();
 this.hibernateSession = entityManager.unwrap(Session.class);
 try{
 //do some queries using both entityManager and hibernateSession
 }finally{
 this.entityManager.close();
 }

But I seem to have a connection leak somewhere. I'm wondering if I am supposed to close both entityManager and hibernateSession. Has anybody else worked with this type of situation?

You do not have to close both Session and EntityManger, under the hood EntityManger in hibernate is actually hibernate Session. Calling unwarp will pass you the underlying Session. So closing one of them is fine.
Regarding the connection leak, look at my answer to the following question, maybe it’s the same issue.