Recently I was developing a system. I met a problem like that.

When web page send a request for some data to display , then back end receive this request . I use Hibernate select some results meeting with request from database , then send these results to web page. When I finished
the select operation, I closed the session. (I use the "lazy=""true" about collection). But when web page display the results, some lazy initial data haven't initialized,however, the session had been closed. Since the session had been closed, lazy initial data couldn't initialize themselves on the web page. So I want to know whether some methods could solve this queston?

FAQ Open Session in View

The key is to keep your Sessions open longer. Many queries within one transaction, all branching an open session, is a very common and accepted design strategy, if not a design pattern.

As was mentioned, the Open Session in View pattern embraces this idea. It's easily implemented as a ServletFilter in a web based application.

Here's a little tutorial on How Hibernate Works. It explains a little about how the Hibernate3 Session works and how to avoid HibernateException types such as the ObjectNotFoundException and more to the point, LazyInitializationException:

http://jpa.ezhibernate.com/Javacode/learn.jsp?tutorial=07howhibernateworks