cartdao.java

一个java写的网上购物系统

package com.hb.myshop.dao;

import java.util.List;

import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import com.hb.myshop.idao.ICartDAO;
import com.hb.myshop.po.Cart;
import com.hb.myshop.po.CartId;
import com.hb.myshop.po.Ware;


public class CartDAO extends HibernateDaoSupport implements ICartDAO{
	
	
	public List getCartById(String cartId)
	{
		HibernateTemplate ht = this.getHibernateTemplate();
		List carts = ht.find("from Cart where cartid='"+cartId+"'");
		return carts;
	}
	
	public void insertCart(String cartId,String wareId){
		HibernateTemplate ht = this.getHibernateTemplate();
		Ware ware=(Ware)ht.get(Ware.class,wareId);
		Cart cart=new Cart(new CartId());
		CartId cartid=cart.getId();
		cartid.setCartid(cartId);
		cartid.setWare(ware);
		Cart temp=(Cart)ht.get(Cart.class,cartid);
		if(temp!=null){  //购物车里已有此商品
			String numprice=Float.toString((Integer.parseInt(temp.getWarenum())+1)*Float.parseFloat(ware.getWareprice()));
			cart.setNumprice(numprice);
			cart.setWarenum(Integer.toString(Integer.parseInt(temp.getWarenum())+1));
			ht.update(cart);
		}
		else{
			cart.setNumprice(ware.getWareprice());
			cart.setWarenum("1");
			ht.save(cart);
		}
	}
	
	public void deleteWareFromCart(String cartId,String wareId){
		HibernateTemplate ht = this.getHibernateTemplate();
		CartId cartid=new CartId(cartId,(Ware)ht.get(Ware.class, wareId));
		Cart cart = (Cart)ht.get(Cart.class, cartid);
		ht.delete(cart);
	}
}