a different object with the same identifier value was already associated with the session:
时间：2015-02-11 20:14:47
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hibernate操作:
实例化两个model类,更新时会提示
a different object with the same identifier value was already associated with the session:
解决方法:merge
原文：http://www.cnblogs.com/zhouyu629/p/4286751.html
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