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HibernateSession
Session1 is same as Session2, Transaction is same as Transaction2
Session1 is not same as Session2, Transaction1 is not same as Transaction2
Illegal attempt to associate a collection with two open sessions
importStatus is retrieved via session1.
If using session2 to up ...
However的用法主要有以下两点：
（一）用作连接副词，相当于no matter how，引导让步状语从句，意思是“不管怎样……”“无论如何……”，具体结构有以下两种：
1．however+形容词+主语+系动词，例：
However rich people are，they always seem anxious to take more money.
无论人们有多富裕，他们似乎总是渴望挣到更多的钱。
2．however+副词+主语+谓语，例：
However fast he runs，he can’t catch up with us. 无论他跑得多快也不能赶上我们。 ...