hibernate exception nested transactions not supported 解决方法

开启事务之前先判断事务是否已经打开，方法如下：

JdbcTransaction tx=(JdbcTransaction) session.beginTransaction(); 

改为
JdbcTransaction tx = session.getTransaction().getLocalStatus()==LocalStatus.ACTIVE?(JdbcTransaction)session.getTransaction():(JdbcTransaction) session.beginTransaction();