additemaction.java

一个小型的购物商店

/*
 * AddItemAction.java
 *
 * Created on 2006年9月15日, 上午10:03
 */

package com.shopping.actions;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
import com.shopping.model.*;
import java.util.*;
/**
 *
 * @author 曹昊
 * @version
 */

public class AddItemAction extends Action {
    
    /* forward name="success" path="" */
    private final static String SUCCESS = "index";
    
    public ActionForward execute(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        HashMap products =  (HashMap)request.getSession().getServletContext().getAttribute("products");
        Object oids = request.getParameterValues("id");
        Object ocart = request.getSession().getAttribute("cart");
        if(oids == null || ocart == null)
            return mapping.findForward(SUCCESS);
        
        Cart cart = (Cart)ocart;
        String[] selectIds = (String[])oids;
        HashMap items = (HashMap)cart.getItems();
        for(int i = 0; i<selectIds.length; i++) {
            if (items.containsKey(selectIds[i])){
                Item item =(Item)items.get(selectIds[i]);
                item.incrementNumber();
                item.incrementCost();
            } else{
                Product product = (Product)products.get(selectIds[i]);
                Item item = new Item();
                item.setProduct(product);
                item.setNumber(1);
                item.setCost(product.getPrice());
                cart.addItem(item);
            }
        }
        request.getSession().setAttribute("cart",cart);
        return mapping.findForward(SUCCESS);
        
    }
}