I have some questions about using Hibernate in JSP web application.
Session s = HibernateUtil.getSessionFactory().openSession();
Session s = HibernateUtil.getSessionFactory().getCurrentSession()
As explained in this forum post, 1 and 2 are related. If you set
hibernate.current_session_context_class to thread and then implement something like a servlet filter that opens the session - then you can access that session anywhere else by using the
SessionFactory.openSession() always opens a new session that you have to close once you are done with the operations.
SessionFactory.getCurrentSession() returns a session bound to a context - you don't need to close this.
If you are using Spring or EJBs to manage transactions you can configure them to open / close sessions along with the transactions.
You should never use
one session per web app - session is not a thread safe object - cannot be shared by multiple threads. You should always use "one session per request" or "one session per transaction"