异常处理：Hibernate:a different object with the same identifier value was already associated with the ses

异常处理：Hibernate:a different object with the same identifier value was already associated with the session 问题出现原因：个人理解是在一同个事务中，session中已经存在一个与当前对象不同但是标识符相同的对象，导致无法修改操作 解决办法：共同一个对象操作 之前的错误代码： new 一个对象之后，

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