updateitemaction.java

一个简易的网上书店（jsp+sqlservler+struts）。

package com.webshop.actions;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import com.webshop.forms.*;
import com.webshop.domain.*;
import java.util.Iterator;
/**
 * @version 	1.0
 * @author
 */
public class UpdateItemAction extends Action {

	/**
	* Constructor
	*/
	public UpdateItemAction() {

		super();

	}
	public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,
		HttpServletResponse response)
		throws Exception {

		 CartForm cartForm = (CartForm) form;

	    Iterator cartItems = cartForm.getCart().getCartItems();
	    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 (Exception e) {
	        //ignore on purpose
	      }
	    }

    return mapping.findForward("success");

	}
}