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");
        
        
    }

}