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();

   }

 }