load 和 get的区别

session加载数据库数据时，load 和  get

1.load是生成代理对象，调用该对象时才发出sql语句

	public void testLoad() {
	
		Session session = sessionFactory.getCurrentSession();
		session.beginTransaction();
		Teacher t = (Teacher)session.load(Teacher.class, 1);
		
                  //System.out.println(t.getName());  //此时生成sql语句
		session.getTransaction().commit();
                  System.out.println(t.getName()); //次句会报错ERROR LazyInitializationException，应为load生成的是代理对象，发出sql会有延迟，此处调用发出sql时，session已经关闭，所有会报错no session
 			}

2.get是直接发sql语句

	public void testGet() {
	
		Session session = sessionFactory.getCurrentSession();
		session.beginTransaction();
		Teacher t = (Teacher)session.get(Teacher.class, 1); //此时生成sql语句
		
		session.getTransaction().commit();
		System.out.println(t.getName());  //不会报错，输出对象t的name,因为t已经查出
	}