additemtocartaction.java

这是一个bookstore的应用

package com.netshop.web.struts.action;

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 com.netshop.domain.service.*;
import com.netshop.domain.service.impl.*;
import com.netshop.domain.model.Cart;
import com.netshop.domain.model.Item;

import com.netshop.web.struts.form.CartActionForm;

public class AddItemToCartAction extends BaseAction {

    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        CartActionForm cartForm = (CartActionForm) form;
        Cart cart = cartForm.getCart();
        String workingItemId = cartForm.getWorkingItemId();
        if (cart.containsItemId(workingItemId)) {
            cart.incrementQuantityByItemId(workingItemId);
        } else {           
            ProductManager manager = ManagerFactory.createProductManager();
            boolean isInStock = manager.isItemInStock(workingItemId);
            Item item = manager.getItem(workingItemId);
            cartForm.getCart().addItem(item, isInStock);
        }
        return mapping.findForward("success");
    }

}