Hibernate Readme

1) hibernate的event/eventlistener(type="post-insert") (http://blog.csdn.net/guosydragon/archive/2007/04/15/1565742.aspx)
   java.util.EventListener/java.util.EventObject(http://blog.csdn.net/wjp553650958/archive/2009/09/10/4538827.aspx)

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