session.delete(user);

                   tx.commit();

                   session.close();}

更新 : session.update()

public void testUpdate(){

                   Configuration conf=new Configuration();

                   conf.configure();

                   SessionFactory factory=conf.buildSessionFactory();

                   Session session=factory.openSession();

                   Transaction tx=session.beginTransaction();

                   User user=(User) session.load(User.class, 2);

                   user.setEmail("77758521.@163.com");

                   session.update(user);

                   tx.commit();

                   session.close();

         }

findById查询  session.load()

    findAll查询 Query query = session.createQuery("from User");

                 List list = query.list();

public void testFindAll(){

                   Configuration congfig=new Configuration();

                   congfig.configure();

                   SessionFactory factory=congfig.buildSessionFactory();

                   Session session=factory.openSession();

                   Query query=session.createQuery("from User");

                   List list=query.list();

                   for(User user:list){

                   System.out.println(user.getId()+""+user.getEmail());}

                   session.close();}

   3)Hibernate提供的映射类型

     在hbm.xml映射文件中,利用type="映射类型"使用.

主要作用是指定属性和字段之间的如何进行类型转换

    *整数:integer,long

    *浮点数:double

    *字符串:string

    *日期时间:date(仅包含年月日),timestamp(包含年月日时分秒)

    *布尔:true_false 完成布尔属性和T,F字符之间的转换

          yes_no  完成布尔属性和Y,N字符之间的转换