cart.java

该代码是《JSP应用与开发实例》一书的配套光盘

package com.jspdev.ch6;
import java.util.HashMap;

public class Cart 
{
	private String userId;//用户的标识
	private HashMap items;//购物车中的物品
	public Cart()
	{
		items=new HashMap();
	}
	public void addItem(String itemId,int quantity)
	{
		items.put(itemId,new Integer(quantity));
	}
	public void removeItem(String itemId)
	{
		items.remove(itemId);
	}
	public void updateItem(String itemId,int quantity)
	{
		if(items.containsKey(itemId))items.remove(itemId);
		items.put(itemId,new Integer(quantity));
	}
	public HashMap getItems()
	{
		return this.items;
	}
	public void setUserId(String userId)
	{
		this.userId=userId;
	}
	public String getUserId()
	{
		return this.userId;
	}
	public void clear()
	{
		items.clear();
	}
}