titemoperate.java

来自「java 框架核心技术编程」· Java 代码 · 共 41 行

package org.lxh.hibernate05;

import java.util.Iterator;

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

public class TItemOperate {
	private Session session ;
	public TItemOperate()
	{
		Configuration config = new Configuration().configure() ;
		SessionFactory factory = config.buildSessionFactory() ;
		this.session = factory.openSession() ;
	}
	// 增加操作，增加书或DVD
	// TBook和TDVD都是TItem的子类
	public void insert(TItem item)
	{
		this.session.save(item) ;
		this.session.beginTransaction().commit() ;
		this.session.close() ;
	}
	// 进行按ID查询操作
	public TItem queryById(String id)
	{
		TItem item = null ;
		String hql = "FROM TItem AS t WHERE t.id=?" ;
		Query q = this.session.createQuery(hql) ;
		q.setString(0,id) ;
		Iterator iter = q.list().iterator() ;
		if(iter.hasNext())
		{
			item = (TItem)iter.next() ;
		}
		return item ;
	}
}