removeitemaction.java

IBM提供的购物车

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 com.webshop.db.ItemDAO;


/**
 * @version 	1.0
 * @author
 */
public class RemoveItemAction extends Action {

	/**
	* Constructor
	*/
	public RemoveItemAction() {

		super();

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

	    Item item = cartForm.getCart().removeItemById(cartForm.getTheItemId());
	
	    if (item == null) {
	       request.setAttribute("message", "Attempted to remove null CartItem from Cart.");
	      return mapping.findForward("error");
	    } else {
	      return mapping.findForward("success");
	    }
	}
		
   
}