queryallproduct.java

java c/s结构开发中使用Hibernate的一些实例

package com.hibernate;

import java.util.Iterator;
import java.util.List;

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

public class QueryAllProduct {
	public static void main(String[] args) {
		// 读取配置文件hibernate.cfg.xml
		Configuration cfg = new Configuration().configure();
		
		// 创建SessionFactory
		SessionFactory factory = cfg.buildSessionFactory();
		
		// 创建Session
		Session session = factory.openSession();
		
		Product p = null;
		
		// 使用HQL查询
		String hql = "FROM Product as pro";
		
		// 通过Query方法查询
		Query q = session.createQuery(hql);

		
		//查询结果保存到list中
		List list = q.list();
		
		//遍历是否存在该id的产品，如果存在则进行输出
		Iterator iter = list.iterator();
		while(iter.hasNext()) {
			p = (Product) iter.next();
			System.out.println("id:" + p.getId() + " name:" + p.getName() + "  price:" + p.getPrice());
		}
		
		// 关闭session
		if(session.isOpen()) {
			session.close();
		}
	}
}