orderdao.java

模仿当当网基于struts+hierbernate与mysql的商务网站。

package org.whatisjava.dang.dao;

import java.util.List;

import org.hibernate.FlushMode;
import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.Transaction;
import org.whatisjava.dang.domain.Order;
import org.whatisjava.dang.domain.ReceiveAddress;
import org.whatisjava.dang.domain.SendWay;
import org.whatisjava.dang.domain.User;

public class OrderDao {

	public void save(Order order) {
		Session session=HbSessionFactory.getSession();
		Transaction tst=session.beginTransaction();
		if(session.load(User.class, order.getUserId())!=null&&session.load(SendWay.class,order.getSendId())!=null&&session.load(ReceiveAddress.class, order.getReceiveId())!=null){
			session.save(order);
			tst.commit();
		}
		session.close();
	}

	public List<Order> findByUser(User user) {
		Session session=HbSessionFactory.getSession();
		session.setFlushMode(FlushMode.NEVER);
		Query query=session.createQuery("from Order o where o.userId=?");
		query.setInteger(0,user.getId());
		List<Order> list=query.list();
		session.close();
		return list;
	}

	public Order getById(Integer id) {
		Session session=HbSessionFactory.getSession();
		session.setFlushMode(FlushMode.NEVER);
		Order order=(Order)session.get(Order.class,id);
		session.close();
		return order;
	}

}