Hibernate框架增删改查测试类归为一个类

 package cn.happy.test;

 import org.hibernate.Session;
 import org.hibernate.SessionFactory;
 import org.hibernate.Transaction;
 import org.hibernate.cfg.Configuration;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;

 import cn.happy.entity.Student;
 import cn.happy.util.HibernateUtil;

 public class H_01Test {
     Session session;
     Transaction tx;
      public static void main(String[] args) {
        Class clazz=Student.class;
        System.out.println(clazz);
      }

      @After
      public void afterTest(){
          tx.commit();
          HibernateUtil.closeSession();
      }

      @Before
      public void initData(){
          session = HibernateUtil.getSession();
          tx= session.beginTransaction();
      }

      /**
          * 1.3  用get方法查询
          */
         @Test
         public void getTest(){
              Student stu=(Student)session.get(Student.class, 3);
              System.out.println(stu);

         }

     /**
      * 1.2 修改学生
      */
     @Test
     public void updateTest(){
          Session session = HibernateUtil.getSession();

          //不被上下文跟踪对象
          /*Student stu=new Student();
          stu.setId(3);
          stu.setName("微冷的雨训练营");*/

          //方式二：如何用呗上下文跟踪的方式
          //检索出一条记录，一个实体对象
          Student stu= (Student)session.load(Student.class,3);
          stu.setName("金龙加油！！！！");

          Transaction tx = session.beginTransaction();
          session.update(stu);
          tx.commit();
          HibernateUtil.closeSession();
          System.out.println("update ok!");
     }

     /**
      * 1.1 删除学生
      */
     @Test
     public void delTest(){

          Student stu=new Student();
          stu.setId(2);
          session.delete(stu);

          System.out.println("del ok!");
     }

     /**
      * 1.0 添加学生
      */
   @Test
   public void testAdd(){
       //1.1构建一个学生对象
       Student stu=new Student();
       stu.setAge(18);
       stu.setName("2016年8月28日09:21:09训练营");
       stu.setId(3);

       //1.2 找到和数据库的接口      xxx========session--->sessionFactory--->configure.buildSessionFactory()
       //咱们要想打通和db通道
       Configuration cf=new Configuration().configure("hibernate.cfg.xml");
       SessionFactory factory = cf.buildSessionFactory();
       Session session = factory.openSession();
       Transaction tx = session.beginTransaction();

       //1.3保存
       session.save(stu);
       tx.commit();
       session.close();
   }

 }