updatecartquantitiesaction.java

这是一个网上购物店的源码

package org.digitstore.web.struts.action;

import java.util.Iterator;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.digitstore.domain.CartItem;
import org.digitstore.web.struts.form.CartActionForm;

public class UpdateCartQuantitiesAction extends BaseAction {

    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        CartActionForm cartForm = (CartActionForm) form;
        Iterator cartItems = cartForm.getCart().getAllCartItems();
        while (cartItems.hasNext()) {
            CartItem cartItem = (CartItem) cartItems.next();
            String itemId = cartItem.getItem().getItemId();
            try {
                int quantity = Integer.parseInt(request.getParameter(itemId));
                cartForm.getCart().setQuantityByItemId(itemId, quantity);
                if (quantity < 1) {
                    cartItems.remove();
                }
            } catch (NumberFormatException e) {
                //ignore on purpose
            }
        }
        return mapping.findForward("success");
    }

}