package?com.surf.cart;

import?java.io.Serializable;
import?java.math.BigDecimal;
import?java.util.Collection;
import?java.util.HashMap;
import?java.util.Iterator;
import?java.util.Map;
import?com.surf.shop.Item;

/**
?*?Cart代表了購物車，提供了訪問CartItem的方法，封裝了購物車的所有業務邏輯
?*?1、增加商品
?*?2、重新設置商品的數量
?*?3、刪除商品
?*?4、清空購物車
?*?5、獲得購物車中所有商品的信息
?*/
public?class?Cart?implements?Serializable?{
	/**
	?*?
	?*/
	private?static?final?long?serialVersionUID?=?1L;
	/*?Private?Fields?*/
	private?Map?itemMap?=?new?HashMap（）;
	public?Collection?items;

	public?int?getItemSize（）?{
		return?itemMap.size（）;
	}

	/*?Public?Methods?*/
	public?boolean?containsItemId（String?itemId）?{
		return?itemMap.containsKey（itemId）;
	}

	/**
	?*?往購物車中增加一個item。
	?*/
	public?void?addItem（Item?item?boolean?isInStock）?{
		//Collection?items;
		try?{
			com.surf.cart.CartItem?cartItem?=?（com.surf.cart.CartItem）?itemMap.get（item.getItemId（））;
			if?（cartItem?==?null）?{
				cartItem?=?new?com.surf.cart.CartItem（）;
				cartItem.setItem（item）;
				cartItem.setQuantity（0）;
				cartItem.setInStock（isInStock）;
				itemMap.put（item.getItemId（）?cartItem）;
				items?=?itemMap.values（）;
			}?else?{
				System.out.println（“addItem---“?+?item.getItemId（））;
			}
			cartItem.incrementQuantity（）;
		}?catch?（Exception?e）?{
			System.out.println（e.getMessage（））;
			e.printStackTrace（）;
		}
	}

	/**
	?*?刪除購物車中指定itemid的item
	?*/
	public?Item?removeItemById（String?itemId）?{
		CartItem?cartItem?=?（CartItem）?itemMap.remove（itemId）;
		
		if?（cartItem?==?null）?{
			return?null;
		}?else?{
			items?=?itemMap.values（）;
			return?cartItem.getItem（）;
		}
	}

	/**
	?*?使指定itemid的item數量加1
	?*/
	public?void?incrementQuantityByItemId（String?itemId）?{
		CartItem?cartItem?=?（CartItem）itemMap.get（itemId）;
		cartItem.incrementQuantity（）;
	}

	/**
	?*?重新設置item的數量
	?*/
	public?void?setQuantityByItemId（String?itemId?int?quantity）?{
		CartItem?cartItem?=?（CartItem）itemMap.get（itemId）;
		cartItem.setQuantity（quantity）;

	}
	/**
	?*?計算購物車中商品總金額
	?*/

	public?BigDecimal?getSubTotal（）?{

		
	
		BigDecimal?subTotal?=?new?BigDecimal（“0“）;
		System.out.println（subTotal）;
		Iterator?items?=?getAllCartItems（）;
		System.out.println（items）;
		while?（items.hasNext（））?{
			com.surf.cart.CartItem?cartItem?=?（com.surf.cart.CartItem）items.next（）;
			System.out.println（cartItem）;
			
			Item?item?=?cartItem.getItem（）;
			System.out.println（“subTota000001“）;
			System.out.println（item）;
			
			BigDecimal?listPrice?=?item.getListPrice（）;
			System.out.println（“subTota000002“）;
			System.out.println（listPrice）;
			BigDecimal?quantity?=?new?BigDecimal（String.valueOf（cartItem.getQuantity（）））;
			System.out.println（“subTota0000003“）;
			System.out.println（listPrice）;
			System.out.println（quantity）;
			System.out.println（item）;
			//subTotal?=?subTotal.add（listPrice.multiply（quantity））;
			//subTotal?=?subTotal.add（listPrice.multiply（new?BigDec

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????576??2008-04-09?14:52??bookstore\.classpath

?????目錄??????????0??2008-08-13?14:03??bookstore\.myeclipse

?????文件????????300??2008-04-09?14:52??bookstore\.mymetadata

?????文件???????1227??2008-04-09?14:52??bookstore\.project

?????文件???????3674??2008-04-09?14:52??bookstore\src\com\surf\cart\Cart.java

?????文件???????1413??2008-04-09?14:52??bookstore\src\com\surf\cart\CartItem.java

?????目錄??????????0??2008-08-13?14:03??bookstore\src\com\surf\cart

?????文件????????258??2008-04-09?14:52??bookstore\src\com\surf\forum\javabean\baseBean.java

?????文件???????1579??2008-04-09?14:52??bookstore\src\com\surf\forum\javabean\ForumBean.java

?????文件????????901??2008-04-09?14:52??bookstore\src\com\surf\forum\javabean\PageBean.java

?????文件????????921??2008-04-09?14:52??bookstore\src\com\surf\forum\javabean\PageBusiness.java

?????文件???????2539??2008-04-09?14:52??bookstore\src\com\surf\forum\javabean\TopicBean.java

?????文件???????1434??2008-04-09?14:52??bookstore\src\com\surf\forum\javabean\TopicVO.java

?????目錄??????????0??2008-08-13?14:03??bookstore\src\com\surf\forum\javabean

?????文件???????3734??2008-04-09?14:52??bookstore\src\com\surf\forum\servlet\DeleteTopicServlet.java

?????文件???????4136??2008-04-09?14:52??bookstore\src\com\surf\forum\servlet\EditTopicServlet.java

?????文件???????2141??2008-04-09?14:52??bookstore\src\com\surf\forum\servlet\ForumServlet.java

?????文件???????3794??2008-04-09?14:52??bookstore\src\com\surf\forum\servlet\NewTopicServlet.java

?????文件???????3854??2008-04-09?14:52??bookstore\src\com\surf\forum\servlet\ReplyTopicServlet.java

?????目錄??????????0??2008-08-13?14:03??bookstore\src\com\surf\forum\servlet

?????目錄??????????0??2008-08-13?14:03??bookstore\src\com\surf\forum

?????文件???????2530??2008-04-09?14:52??bookstore\src\com\surf\leaveword\AddMessageServlet.java

?????文件???????2591??2008-04-09?14:52??bookstore\src\com\surf\leaveword\MessageBean.java

?????文件????????950??2008-04-09?14:52??bookstore\src\com\surf\leaveword\MessageVO.java

?????文件???????2677??2008-04-09?14:52??bookstore\src\com\surf\leaveword\ViewMessageServlet.java

?????目錄??????????0??2008-08-13?14:03??bookstore\src\com\surf\leaveword

?????文件????????682??2008-04-09?14:52??bookstore\src\com\surf\manage\product\Category.java

?????文件???????1122??2008-04-09?14:52??bookstore\src\com\surf\manage\product\Product.java

?????文件???????3873??2008-04-09?14:52??bookstore\src\com\surf\manage\product\ProductBean.java

?????文件????????865??2008-04-09?14:52??bookstore\src\com\surf\manage\product\ViewCategory.java

............此處省略193個文件信息