shoppingcart.java

SSH 开发网上订餐系统。由于SSH相关包太大不方便上传。请自行导入。

package com.web.util;

import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;

import com.web.model.FoodInfo;

public class ShoppingCart {
	HashMap items = null ;
	
	public ShoppingCart()
	{
		this.items = new HashMap() ;
	}
	
	public Collection getAllFood() {
		return items.values();
	}
	//向餐车添加商品
	public void addFood(String foodId ,FoodInfo foodinfo)
	{
		if(items.containsKey(foodId)) ;
		//
		//
		else
		{
			ShoppingCartItem food = new ShoppingCartItem(foodinfo) ;
			items.put(foodId, food) ;
		}
	}
	//删除商品
	public void removeFood(String foodId)
	{
		if(items.containsKey(foodId))
		{
			items.remove(foodId) ;
		}
	}
	//修改数量
	public void updateFoodQuantity(String foodid,int quantity)
	{
		ShoppingCartItem food = (ShoppingCartItem)items.get(foodid) ;
		food.setQuantity(quantity) ;
	}
	//返回相应商品小计
	public double getFoodTotal(FoodInfo f)
	{
		double foodtotal = 0.00 ;
		ShoppingCartItem food =(ShoppingCartItem)items.get(f.getFId()) ;
		FoodInfo f2 = (FoodInfo)food.getItem() ;
		foodtotal = food.getQuantity()*f2.getFPrice() ;
		return foodtotal;	
	}
	//返回所有价格总价
	public double getFoodsTotal()
	{
		double foodstotal = 0.00 ;
		for(Iterator i = getAllFood().iterator();i.hasNext();)
		{
			ShoppingCartItem food = (ShoppingCartItem)i.next() ;
			FoodInfo f = (FoodInfo)food.getItem() ;
			foodstotal += food.getQuantity() * f.getFPrice() ;			
		}
		return foodstotal;
	}
	//清空餐车	
	public void clearFoodCart() 
	{
		items.clear();   	
	}
}