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();
  }
    
}