cart.jsp

《精通JSP编程 》源代码(赵强那本) 很有用的源代码

<%@page import="java.util.*" %>
<%@page import="jnestore.javabeans.*" %>
<%
 String operation = request.getParameter("operation"); // retrieve the parameter indicating the type of operation
 
        
        if (operation.equalsIgnoreCase("addItem")) {
            Hashtable cart = (Hashtable) session.getAttribute("shoppingcart");
            if (cart == null) {
             cart = new Hashtable();
             session.setAttribute("shoppingcart", cart);
            }
           String itemSku = request.getParameter("sku");
           Catalog cat = new Catalog();
           ItemInfo item = cat.getItem(itemSku);
           cart.put(itemSku, item);          
           
        }
        
        if (operation.equalsIgnoreCase("removeItem")) {
            Hashtable cart = (Hashtable) session.getAttribute("shoppingcart");
            if (cart == null) {
             cart = new Hashtable();
             session.setAttribute("shoppingcart", cart);
            }
            String itemSku = request.getParameter("sku");
            Catalog cat = new Catalog();
            ItemInfo item = cat.getItem(itemSku);
            cart.remove(itemSku);
             
        }
        if (operation.equalsIgnoreCase("removeAll")) {
            session.setAttribute("shoppingcart", new Hashtable());           
        }
        
        RequestDispatcher rd = request.getRequestDispatcher("/browse.jsp");
        rd.forward(request, response);
        
 %>