package?cart;

import?java.util.*;
import?database.BookDetails;


public?class?ShoppingCart?{
????HashMap?items?=?null;
????int?numberOfItems?=?0;

????public?ShoppingCart（）?{
????????items?=?new?HashMap（）;
????}

????public?synchronized?void?add（String?bookId?BookDetails?book）?{
????????if?（items.containsKey（bookId））?{
????????????ShoppingCartItem?scitem?=?（ShoppingCartItem）?items.get（bookId）;
????????????scitem.incrementQuantity（）;
????????????System.out.println（“in?add?quantity?is?“?+?scitem.getQuantity（））;
????????}?else?{
????????????ShoppingCartItem?newItem?=?new?ShoppingCartItem（book）;
????????????items.put（bookId?newItem）;
????????????System.out.println（“in?add?quantity?is?“?+?newItem.getQuantity（））;
????????}
????????
????}

????public?synchronized?void?remove（String?bookId）?{
????????if?（items.containsKey（bookId））?{
????????????ShoppingCartItem?scitem?=?（ShoppingCartItem）?items.get（bookId）;
????????????scitem.decrementQuantity（）;

????????????if?（scitem.getQuantity（）?<=?0）?{
????????????????items.remove（bookId）;
????????????}

????????????numberOfItems--;
????????}
????}

????public?synchronized?List?getItems（）?{
????????List?results?=?new?ArrayList（）;
????????Iterator?items?=?this.items.values（）.iterator（）;

????????while?（items.hasNext（））?{
????????????results.add（items.next（））;
????????}

????????return?（results）;
????}

????protected?void?finalize（）?throws?Throwable?{
????????items.clear（）;
????}

????public?synchronized?int?getNumberOfItems（）?{
????????numberOfItems?=?0;

????????for?（Iterator?i?=?getItems（）
??????????????????????????????.iterator（）;?i.hasNext（）;）?{
????????????ShoppingCartItem?item?=?（ShoppingCartItem）?i.next（）;
????????????numberOfItems?+=?item.getQuantity（）;
????????????System.out.println（“number?of?items?is?“?+?numberOfItems）;
????????}

????????return?numberOfItems;
????}

????public?synchronized?double?getTotal（）?{
????????double?amount?=?0.0;

????????for?（Iterator?i?=?getItems（）
??????????????????????????????.iterator（）;?i.hasNext（）;）?{
????????????ShoppingCartItem?item?=?（ShoppingCartItem）?i.next（）;
????????????BookDetails?bookDetails?=?（BookDetails）?item.getItem（）;

????????????amount?+=?（item.getQuantity（）?*?bookDetails.getPrice（））;
????????}

????????return?roundOff（amount）;
????}

????private?double?roundOff（double?x）?{
????????long?val?=?Math.round（x?*?100）;?//?cents

????????return?val?/?100.0;
????}

????public?synchronized?void?clear（）?{
????????System.err.println（“Clearing?cart.“）;
????????items.clear（）;
????????numberOfItems?=?0;
????}
}

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

?????文件????????362??2009-09-26?10:03??BS\.classpath

?????文件????????279??2009-09-26?10:03??BS\.mymetadata

?????文件???????1220??2009-09-26?10:09??BS\.project

?????文件???????1105??2009-09-26?10:09??BS\WebRoot\bookcashier.jsp

?????文件???????1883??2009-09-26?10:09??BS\WebRoot\bookcatalog.jsp

?????文件???????1207??2009-09-26?10:09??BS\WebRoot\bookdetails.jsp

?????文件???????1518??2009-09-26?10:05??BS\WebRoot\bookordererror.jsp

?????文件????????907??2009-09-26?10:09??BS\WebRoot\bookreceipt.jsp

?????文件???????2900??2009-09-26?10:09??BS\WebRoot\bookshowcart.jsp

?????文件???????1307??2009-09-26?10:14??BS\WebRoot\bookstore.jsp

?????文件????????253??2009-09-26?10:05??BS\WebRoot\global.jsp

?????文件????????298??2009-09-26?10:05??BS\WebRoot\gobookreceipt.jsp

?????文件????????381??2009-09-26?10:03??BS\WebRoot\WEB-INF\web.xml

?????文件????????452??2009-09-26?10:04??BS\WebRoot\WEB-INF\classes\exception\BookNotFoundException.class

?????文件????????455??2009-09-26?10:04??BS\WebRoot\WEB-INF\classes\exception\BooksNotFoundException.class

?????文件????????431??2009-09-26?10:04??BS\WebRoot\WEB-INF\classes\exception\OrderException.class

?????文件???????1456??2009-09-26?10:19??BS\WebRoot\WEB-INF\classes\database\BookDB.class

?????文件???????5116??2009-09-26?10:04??BS\WebRoot\WEB-INF\classes\database\BookDBAO.class

?????文件???????2497??2009-09-26?10:04??BS\WebRoot\WEB-INF\classes\database\BookDetails.class

?????文件????????555??2009-09-26?10:04??BS\WebRoot\WEB-INF\classes\config\Constants.class

?????文件???????3143??2009-09-26?10:04??BS\WebRoot\WEB-INF\classes\cart\ShoppingCart.class

?????文件????????881??2009-09-26?10:04??BS\WebRoot\WEB-INF\classes\cart\ShoppingCartItem.class

?????文件?????????39??2009-09-26?10:03??BS\WebRoot\meta-INF\MANIFEST.MF

?????文件????????194??2009-09-26?10:04??BS\src\exception\BookNotFoundException.java

?????文件????????197??2009-09-26?10:04??BS\src\exception\BooksNotFoundException.java

?????文件????????173??2009-09-26?10:04??BS\src\exception\OrderException.java

?????文件????????885??2009-09-26?10:19??BS\src\database\BookDB.java

?????文件???????5312??2009-09-26?10:04??BS\src\database\BookDBAO.java

?????文件???????2195??2009-09-26?10:04??BS\src\database\BookDetails.java

?????文件????????297??2009-09-26?10:04??BS\src\config\Constants.java

............此處省略21個文件信息