personoperater.java

简单的Hibernate入门程序

package org.lxh.hibernate.demo01;

import java.util.List;
import java.util.Iterator;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.cfg.Configuration;


/***
 * 
 * 操作Hibernate 的类，增加，修改，删除，按ID查询，模糊查询，查询全部
 * @author zwj
 *
 */
public class PersonOperater {
	//在Hibernate中，所有的操作都是通过Session完成
	//此Session不同于Jsp中的Session
	private Session session=null;
	
	//在构造方法中实例化Session对象
	public PersonOperater()
	{
		//找到Hibernate配置
		Configuration config =new Configuration().configure();
		//从配置中取出SessionFactory
		SessionFactory factory=config.buildSessionFactory();
		//从SessionFactory取出一个Session
		this.session=factory.openSession();
	}
	
	//所有操作通过Session
	//向数据库中插入数据
	public void insert(Person p){
		Transaction tran=this.session.beginTransaction();
		this.session.save(p);
		//提交事务
		tran.commit();
	}
	//修改
	public void update(Person p){
		Transaction tran=this.session.beginTransaction();
		this.session.update(p);
		//提交事务
		tran.commit();
	}
	//按ID查询，使用HQL语句
	public Person queryById(String id)
	{
		Person p=null;
		String hql="FROM Person as p where p.id=?";
		Query q=this.session.createQuery(hql); 
		q.setString(0,id);
		List l=q.list();
		Iterator iter=l.iterator();
		if(iter.hasNext()){
			p=(Person)iter.next();
		}
		return p;
		
	}
	public void delete(Person p){
		Transaction tran=this.session.beginTransaction();
		this.session.delete(p);
		//提交事务
		tran.commit();
	}
	public List queryByLike(String cond)
	{
		List l = null ;
		String hql = "FROM Person as p WHERE p.name like ?" ;
		Query q = this.session.createQuery(hql) ;
		q.setString(0,"%"+cond+"%") ;
		l = q.list() ;
		return l ;
	}

}