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hibernate学习2_简单hibernate实现

news 来源：原创 2024/5/3 0:18:28

本文通过java工程+hibernate简单实现了一个hibernate持久化java对象到mysql数据库的功能。

1、工程配置

2、数据库连接配置文件hibernate.cfg.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.djl.test">
    <class name="Student" table="student">
      <id name="id" column="ID">
      </id>
      <property name="name" column="name" type="string"/>
      <property name="age" column="age" type="integer"/>
    </class>
</hibernate-mapping>

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3、新建对应java实体Student.java

package com.djl.test;

public class Student {
    private int id;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    private String name;
    private int age;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    
}

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4、建立实体与数据库对应映射关系 student.hbm.xml

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.djl.test">
    <class name="Student" table="student">
      <id name="id" column="ID">
      </id>
      <property name="name" column="name" type="string"/>
      <property name="age" column="age" type="integer"/>
    </class>
</hibernate-mapping>

View Code

5、简单测试程序进行调用

package com.djl.test;

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

public class MainTest {
    public static void main(String... args){
        Student stu = new Student();
        stu.setId(0);
        stu.setAge(20);
        stu.setName("wangshan");
        Configuration config = new Configuration();
        config.configure();
        SessionFactory factory =  config.buildSessionFactory();
        Session session = factory.openSession();
        session.beginTransaction(); 
        session.save(stu);
        session.getTransaction().commit();
        session.close();
        factory.close();        
    }
}