根据请求可变的事务隔离级别

Session session = getSession(dataSource, sessionFactory, Connection.TRANSACTION_SERIALIZABLE);public Session getSession(DataSource dataSource, SessionFactory sessionFactory, int isolationLevel){  // Get connection from current dataSource and set new isolation  Connection connectionWithNewIsolation = dataSource.getConnection();  connectionWithNewIsolation.setTransactionIsolation(isolationLevel);  // Get session from current sessionFactory with the new isolation  Session session = sessionFactory.openSession(connectionWithNewIsolation);  // Hibernate 4.3  //SessionFactory.openStatelessSession(Connection connection)  // Hibernate 3.6  //SessionFactory.openSession(Connection connection)  //SessionFactory.openStatelessSession(Connection connection)  return session;}