当插入、更新不了数据时用事务来操作
public void updateOrder(){
try {
Transaction tx = session.beginTransaction();
Order user = this.get(1);

order.status(1);
session.update(user);
session.flush();
tx.commit();
} catch (HibernateException e) {
e.printStackTrace();
Assert.fail(e.getMessage());
}
}