opercartaction.java

一个小型的购物商店

 /*
  * OperCartAction.java
  *
  * Created on 2006年9月18日, 下午3:22
  */

package com.shopping.actions;

import java.util.*;
import javax.servlet.http.*;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
import org.apache.struts.actions.LookupDispatchAction;
import com.shopping.model.*;
import com.shopping.dao.*;

/**
 *
 * @author 曹昊
 * @version
 */

public class OperCartAction extends LookupDispatchAction {
    
    /* forward name="success" path="" */
    private final static String SUCCESS = "success";
    
    public ActionForward delete(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        String[] selectIds = request.getParameterValues("id");
        Object ocart = request.getSession().getAttribute("cart");
        if(selectIds == null || ocart == null)
            return mapping.findForward(SUCCESS);
        Cart cart = (Cart)ocart;
        cart.deleteItemsByProductId(selectIds);
        return mapping.findForward(SUCCESS);
    }
    
    public ActionForward modify(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        String[] selectIds = request.getParameterValues("id");
        Object ocart = request.getSession().getAttribute("cart");
        if (selectIds == null || ocart == null){
            return mapping.findForward(SUCCESS);
        }
        
        Cart cart = (Cart)ocart;
 //       HashMap items = (HashMap)cart.getItems();
        for(int i = 0; i<selectIds.length; i++) {
            String numbers = request.getParameter(selectIds[i]);
            int number = Integer.parseInt(numbers);
            cart.modifyNumberByProductId(selectIds[i],number);
   //         Item item = (Item)items.get(selectIds[i]);
        }
        request.getSession().setAttribute("cart",cart);
        return mapping.findForward(SUCCESS);
    }
    
    public ActionForward clear(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        Object ocart = request.getSession().getAttribute("cart");
        if( ocart != null){
            Cart cart = (Cart)ocart;
            cart.clear();
        }
        return mapping.findForward(SUCCESS);
    }
    
    public ActionForward check(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        HttpSession session = request.getSession(false);
        if (session.getAttribute("user") == null) {
            return (mapping.findForward("noLogin"));
        } else {
            Cart cart = (Cart) session.getAttribute("cart");
            User user = (User) session.getAttribute("user");
            if (cart.getItems().isEmpty()) {
                return (mapping.findForward("noproduct"));
            } else {
                ShoppingCartDao dao = DaoFactory.getInstance();
                Order order = dao.generateOrder(user, cart);
                cart.setCost(0.0);
                cart.getItems().clear();
                session.setAttribute("order", order);           
                session.setAttribute("cart", cart);
                return (mapping.findForward("generate"));
            }
        }
    }
    
    protected Map getKeyMethodMap() {
        Map<String,String> map = new HashMap<String,String>();
        map.put("operation.submit.delete","delete");
        map.put("operation.submit.modify","modify");
        map.put("operation.submit.clear","clear");
        map.put("operation.submit.check","check");
        return map;
    }
    
}