Hibernate框架增删改查

Posted 2020-08-04 0A1

 1 package cn.happy.util;
 2 
 3 import org.hibernate.Session;
 4 import org.hibernate.SessionFactory;
 5 import org.hibernate.cfg.Configuration;
 6 
 7 /**
 8  * 1.1用于生产session对象的工具类
 9  */
10 public class HibernateUtil {
11     private static Configuration cfg=new Configuration().configure();
12     private static SessionFactory factory=cfg.buildSessionFactory();
13     //方法返回session
14     public static Session getsession(){
15         return factory.openSession();
16     }
17     //关闭session
18     public static void closeSession(){
19         getsession().close();
20     }
21 
22 }

 

 1 package cn.happy.entity;
 2 /**
 3  * 实体类
 4  * @author Administrator
 5  *
 6  */
 7 public class Student {
 8     private Integer id;
 9     private String name;
10     private Integer age;
11     
12     @Override
13     public String toString() {
14         return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";
15     }
16     public Integer getId() {
17         return id;
18     }
19     public void setId(Integer id) {
20         this.id = id;
21     }
22     public String getName() {
23         return name;
24     }
25     public void setName(String name) {
26         this.name = name;
27     }
28     public Integer getAge() {
29         return age;
30     }
31     public void setAge(Integer age) {
32         this.age = age;
33     }
34 
35 }

 1 package cn.happy.test;
 2 
 3 import org.hibernate.SessionFactory;
 4 import org.hibernate.Transaction;
 5 import org.hibernate.cfg.Configuration;
 6 import org.hibernate.classic.Session;
 7 import org.junit.Test;
 8 
 9 import cn.happy.entity.Student;
10 /**
11  * 增加
12  * @author Administrator
13  *
14  */
15 public class addTest {
16 @Test
17     public void addtest(){
18         Student stu=new Student();
19         stu.setId(1);
20         stu.setName("张三");
21         stu.setAge(18);
22         Configuration cf=new Configuration().configure("hibernate.cfg.xml");
23         SessionFactory factory = cf.buildSessionFactory();
24         Session session = factory.openSession();
25         Transaction tx = session.beginTransaction();
26         //保存
27         session.save(stu);
28         tx.commit();
29         session.close();
30     }
31 
32     
33 }

 1 package cn.happy.test;
 2 
 3 import org.hibernate.Session;
 4 import org.hibernate.Transaction;
 5 import org.junit.Test;
 6 
 7 import cn.happy.entity.Student;
 8 import cn.happy.util.HibernateUtil;
 9 /**
10  * 删除
11  * @author Administrator
12  *
13  */
14 public class delTest {
15     @Test
16     public void deltest(){
17          Session session = HibernateUtil.getsession();
18          Student stu=new Student();
19          stu.setId(1);
20          Transaction tx = session.beginTransaction();
21          session.delete(stu);
22          tx.commit();
23          HibernateUtil.closeSession();
24          System.out.println("del ok!");
25     }
26 
27 }

 1 package cn.happy.test;
 2 
 3 import org.hibernate.Session;
 4 import org.hibernate.Transaction;
 5 import org.junit.Test;
 6 
 7 import cn.happy.entity.Student;
 8 import cn.happy.util.HibernateUtil;
 9 /**
10  * 查询
11  * @author Administrator
12  *
13  */
14 public class getTest {
15     @Test
16     public void gettest()
17     {
18         Session session = HibernateUtil.getsession();
19         Student stu=(Student)session.get(Student.class, 1);
20         Transaction tx=session.beginTransaction();
21         System.out.println(stu);
22     }
23 
24 }

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");
        
        
    }

}