getCurrentSession打印出的hashCode不同

Configuration config = new Configuration().configure();
		ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();
		SessionFactory sessionFactory = config.buildSessionFactory(serviceRegistry);
		Session session1 = sessionFactory.getCurrentSession();
		Transaction transaction = session1.beginTransaction();
		Student s = new Student("张三", "男", new Date(), "北京");
		session1.doWork(new Work() {
			@Override
			public void execute(Connection connection) throws SQLException {
				System.out.println("session1的hashcode:"+connection.hashCode());
			}
		});
		session1.save(s);
		transaction.commit();
		
		Session session2 = sessionFactory.getCurrentSession();
		transaction = session2.beginTransaction();
		s = new Student("李四", "男", new Date(), "上海");
		session2.doWork(new Work() {
			@Override
			public void execute(Connection connection) throws SQLException {
				System.out.println("session2的hashcode:"+connection.hashCode());
			}
		});
		session2.save(s);
		transaction.commit();

按理说两次打印的hashCode应该相同

但我打印出的不一样

session1的hashcode:1574258553

session2的hashcode:1774088918

求大神帮看下，我代码错了么？