利用Hibernate 框架，实现对数据库的增删改查

增：

package com.maya.test;
import org.hibernate.*;
import org.hibernate.cfg.*;

import com.maya.model.Family;
public class Test2 {

    public static void main(String[] args) {

        Configuration config=new Configuration().configure();
        SessionFactory factory=config.buildSessionFactory();
        Session session=factory.openSession();                    

        //增加
        Family family=new Family();
        family.setInfoCode("p004");
        family.setName("张三");
        family.setTitle("T003");
        family.setFirm("齐鲁石化济南分公司");
        family.setOrders(4);

        try{
            session.beginTransaction();    //事务开始
            session.save(family);
            session.getTransaction().commit();        //事务提交
        }
        catch(Exception e){
            session.getTransaction().rollback();//如果发生错误，事务回滚
        }

        session.close();//关闭session
        }
    }

Hibernate框架自动生成如下语句，将数据插入数据库中

查询

package com.maya.test;
import java.util.List;

import org.hibernate.*;
import org.hibernate.cfg.*;

import com.maya.model.Family;
public class Test2 {

    public static void main(String[] args) {

        Configuration config=new Configuration().configure();
        SessionFactory factory=config.buildSessionFactory();
        Session session=factory.openSession();                    

//        //查询(根据主键来查)
//        Family fa=session.load(Family.class, 11);
//        if(fa!=null){
//            System.out.println(fa.getName()+" "+fa.getInfoCode());
//        }

        List<Family> list=session.createQuery("from Family").getResultList();   //这里的Family对应的是实体类，不是sql语句中的family

        for(Family fa:list){
            System.out.println(fa.getName()+" "+fa.getInfoCode());
        }

        session.close();//关闭session
        }
    }

查询结果如下：SQL语句自动生成

删除：

package com.maya.test;
import java.util.List;

import org.hibernate.*;
import org.hibernate.cfg.*;

import com.maya.model.Family;
public class Test2 {

    public static void main(String[] args) {

        Configuration config=new Configuration().configure();
        SessionFactory factory=config.buildSessionFactory();
        Session session=factory.openSession();                    

        Family fa=session.get(Family.class,13);    //先查询
        if(fa!=null){
            session.beginTransaction();
            session.delete(fa);                        //后删除
            session.getTransaction().commit();;
        }

        session.close();//关闭session
        }
    }

改

package com.maya.test;
import java.util.List;

import org.hibernate.*;
import org.hibernate.cfg.*;

import com.maya.model.Family;
public class Test2 {

    public static void main(String[] args) {

        Configuration config=new Configuration().configure();
        SessionFactory factory=config.buildSessionFactory();
        Session session=factory.openSession();                    

        Family fa=session.get(Family.class,10);    //先查询
        if(fa!=null){
            session.beginTransaction();
            fa.setName("盲僧");
            fa.setFirm("召唤师峡谷");
            session.update(fa);
            session.getTransaction().commit();
        }
        session.close();//关闭session
        }
    }

注意：但凡涉及到数据操作（增删改）都要加上事务，保证数据增删改的的一致性