java - sessionfactory.openSession() 和 sessionfactory.openStatelessSession() 的区别？

Question

我想知道上面提到的 hibernates sessionfactory 类的两种方法之间的概念差异，如果可以通过简单的例子。

Answer 1

前者打开一个正常(有状态) session ，而后者(可能不足为奇)打开一个无状态 session 。

根据 the Javadoc ，无状态 session 是:

A command-oriented API for performing bulk operations against a database.

A stateless session does not implement a first-level cache nor interact with any second-level cache, nor does it implement transactional write-behind or automatic dirty checking, nor do operations cascade to associated instances. Collections are ignored by a stateless session. Operations performed via a stateless session bypass Hibernate's event model and interceptors. Stateless sessions are vulnerable to data aliasing effects, due to the lack of a first-level cache.

For certain kinds of transactions, a stateless session may perform slightly faster than a stateful session.