shoppingcart.java

在线图书管理系统,所有框架struts2,hibernate,spring 希望有所帮助!

/**
 * 
 */
package com.ascent.util;

import java.util.LinkedList;
import java.util.List;

public class ShoppingCart {
	
	private List items = null;
		
	public ShoppingCart(){
		items = new LinkedList();
	}
	
	public List getItems(){
		return this.items;
	}
	
	public void addItem(ShoppingCartItem newItem){
		ShoppingCartItem cartItem = this.findItem(newItem.getBookId());
		if(cartItem != null){
			cartItem.setQuantity(cartItem.getQuantity()+newItem.getQuantity());
		}else{
			items.add(newItem);
		}
	}
	
	public void removeItem(int itemId){
		System.out.print("======remove invoking !!");
		ShoppingCartItem item = findItem(itemId);
		if(item != null){
			System.out.println("==========prepeared remove");
			items.remove(item);
			System.out.println("==========item is removed");
		}else{
			System.out.println("=========item is not found");
		}
	}
	
	public void deleteItem(ShoppingCartItem newItem){
		items.remove(newItem);
	}
	
	
	public void emptyCart(){
		items.clear();
	}
	
	public double getTotalPrice(){
		double total = 0.0;
		int size = items.size();
		for(int i = 0;i< size;i++){
			total += ((ShoppingCartItem)items.get(i)).getBookPrice()*((ShoppingCartItem)items.get(i)).getQuantity();
		}
		return total;
	}
	
	public ShoppingCartItem findItem(int itemId){
		ShoppingCartItem item = null;
		int num = items.size();
		for(int i = 0;i < num;i++){
			ShoppingCartItem cartItem = (ShoppingCartItem)items.get(i);
			if(itemId == cartItem.getBookId()){
				item = cartItem;
				break;
			}
		}
		return item;
	}

}