叶现一的专栏

EJB异常：java.lang.ClassNotFoundException: org.hibernate.collection.PersistentSet当遇到如下异常时：java.lang.ClassNotFoundException: org.hibernate.collection.PersistentSet考虑是否将hibernate3.jar加入到了工程项目中

Abstract： As we known, there are 3 kinds of fetch strategy in Hibernate. They are “join”,”select” and “subselect”. In this article, I took an example with Customer and Order Entities to show you what is the different between these fetch strategies. Hope

Issue: When you execute a persistence operation with Hibernate, you may get following exception. Exception: a different object with the same identifier value was already associated with the session Solution: Please consider and check if you have inclu