cart.java

一个用MYECLIPSE开发的网上购物系统。 基本功能都已经实现

package db;
import java.util.*;

public class Cart {
	private Vector items = null;
	
	public Cart(){
		items = new Vector();
	}
	
	public Iterator getItemIterator(){
		return items.iterator();
	}
	
	public void addItem(LineItem item){
		boolean sign = false;
		for(Iterator i = items.iterator();i.hasNext();){
			LineItem line = (LineItem)i.next();
			if(line.getItemid().equals(item.getItemid())){
				sign = true;
				line.setQuantity(line.getQuantity()+item.getQuantity());
				break;
			}
		}
		if(!sign){
			items.add(item);
		}
	}
	
	public void removeItem(String itemId){
		for(Iterator i = items.iterator();i.hasNext();){
			LineItem line = (LineItem)i.next();
			if(line.getItemid().equals(itemId)){
				items.remove(line);
				break;
			}
		}
	}
	
	public double getTotalPrice(){
		double price = 0;
		for(Iterator i = items.iterator();i.hasNext();){
			LineItem line = (LineItem)i.next();
			price += line.getQuantity() * line.getUnitprice();
		}
		return price;
	}
}