shoppingcart.java

自己做的购物车 JAVABEAB+TOMCAT_MYSQL

package cn.com.ShopOnLine;
import java.io.Serializable;
import java.util.*;
public class ShoppingCart implements Serializable
{
  
	private static final long serialVersionUID = -6348234709807877646L;
    private HashMap items;
    private int itemAmount;
	public ShoppingCart()
	{
		super();
		items=new HashMap();
		itemAmount=0;
		
	}
	public synchronized void add(String pid,Product product,int num)
	{
		if(items.containsKey(pid))
		{
			items.remove(pid);
			ShoppingItem newitem=new ShoppingItem(product,num);
			items.put(pid, newitem);
		}
		else
		{
			ShoppingItem newitem=new ShoppingItem(product,num);
			items.put(pid, newitem);
			itemAmount++;	
		}
	
	}
	public synchronized void remove(String pid)
	{
		if(items.containsKey(pid))
		{
			items.remove(pid);
			
		}
		
	}
	public synchronized Collection getItems()
	{
		return items.values();
	}
	protected void finalize()
	{
		items.clear();
	}
	
	public synchronized int getItemAmount()
	{
		return itemAmount;
	}
	
	
	
	public synchronized float getTotalReal()
	{
		float total=0.0F;
		for(Iterator it=getItems().iterator();it.hasNext();)
		{
			ShoppingItem si=(ShoppingItem)it.next();
			Product product=si.getItem();
			total=product.getRealprice()*si.getAmount();	
		}
		return total;
	
	}
	

	public synchronized float getTotalCut()
	{
		float total=0.0F;
		for(Iterator it=getItems().iterator();it.hasNext();)
		{
			ShoppingItem si=(ShoppingItem)it.next();
			Product product=si.getItem();
			total=product.getCutprice()*si.getAmount();	
		}
		return total;
	
	}
	public void clear()
	{
		items.clear();
		itemAmount=0;
	}		
	
	
	
}