Hibernate框架增删改查

 package cn.happy.util;

 import org.hibernate.Session;
 import org.hibernate.SessionFactory;
 import org.hibernate.cfg.Configuration;

 /**
  * 1.1用于生产session对象的工具类
  */
 public class HibernateUtil {
     private static Configuration cfg=new Configuration().configure();
     private static SessionFactory factory=cfg.buildSessionFactory();
     //方法返回session
     public static Session getsession(){
         return factory.openSession();
     }
     //关闭session
     public static void closeSession(){
         getsession().close();
     }

 }

 package cn.happy.entity;
 /**
  * 实体类
  * @author Administrator
  *
  */
 public class Student {
     private Integer id;
     private String name;
     private Integer age;

     @Override
     public String toString() {
         return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";
     }
     public Integer getId() {
         return id;
     }
     public void setId(Integer id) {
         this.id = id;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public Integer getAge() {
         return age;
     }
     public void setAge(Integer age) {
         this.age = age;
     }

 }

 package cn.happy.test;

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

 import cn.happy.entity.Student;
 /**
  * 增加
  * @author Administrator
  *
  */
 public class addTest {
 @Test
     public void addtest(){
         Student stu=new Student();
         stu.setId(1);
         stu.setName("张三");
         stu.setAge(18);
         Configuration cf=new Configuration().configure("hibernate.cfg.xml");
         SessionFactory factory = cf.buildSessionFactory();
         Session session = factory.openSession();
         Transaction tx = session.beginTransaction();
         //保存
         session.save(stu);
         tx.commit();
         session.close();
     }

 }

 package cn.happy.test;

 import org.hibernate.Session;
 import org.hibernate.Transaction;
 import org.junit.Test;

 import cn.happy.entity.Student;
 import cn.happy.util.HibernateUtil;
 /**
  * 删除
  * @author Administrator
  *
  */
 public class delTest {
     @Test
     public void deltest(){
          Session session = HibernateUtil.getsession();
          Student stu=new Student();
          stu.setId(1);
          Transaction tx = session.beginTransaction();
          session.delete(stu);
          tx.commit();
          HibernateUtil.closeSession();
          System.out.println("del ok!");
     }

 }

 package cn.happy.test;

 import org.hibernate.Session;
 import org.hibernate.Transaction;
 import org.junit.Test;

 import cn.happy.entity.Student;
 import cn.happy.util.HibernateUtil;
 /**
  * 查询
  * @author Administrator
  *
  */
 public class getTest {
     @Test
     public void gettest()
     {
         Session session = HibernateUtil.getsession();
         Student stu=(Student)session.get(Student.class, 1);
         Transaction tx=session.beginTransaction();
         System.out.println(stu);
     }

 }

package cn.happy.test;

import org.hibernate.Session;
import org.hibernate.Transaction;
import org.junit.Test;

import cn.happy.entity.Student;
import cn.happy.util.HibernateUtil;
/**
 * 修改
 * @author Administrator
 *
 */
public class updateTest {
    @Test
    public void updatetest(){
        Session session = HibernateUtil.getsession();
        Student stu=(Student)session.load(Student.class,1);
        stu.setName("李短");
        Transaction tx=session.beginTransaction();
        session.update(stu);
        tx.commit();
        HibernateUtil.closeSession();
        System.out.println("ok");

    }

}