Illegal attempt to associate a collection with two open session问题
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在spring的HibernateTemplate中经常遇到这样的情况:
一个session 负责载入数据,另一个session 修改了这个数据
如果前一个session没有close的话,就会报标题的错误
解决方法是使用 hibernate的Merge函数
用这个函数代替Update,能将一个已经与session绑定的数据Update
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