static Employee query(int empId) {
		Session session = null;
		Transaction transaction = null;
		try {
			session=HibernateUtil.getSession();
			transaction=session.beginTransaction();
			Employee employee=(Employee) session.get(Employee.class, empId);
			//在這裡得到部門的資訊
			System.out.println("部門的名稱是："+employee.getDepartment().getName());
 

			transaction.commit();
			return employee;
		} finally {
			if(session!=null)
				session.close();
		}
	}

Employee employee=query(1);
		System.out.println(employee.getDepartment().getName());