additemaction.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 com.webshop.db.ItemDAO;

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

	/**
	* Constructor
	*/
	public AddItemAction() {

		super();

	}
	public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
		
		CartForm cartForm = (CartForm) form;
    Cart cart = cartForm.getCart();
    String theItemId = cartForm.getTheItemId();

    if (cart.containsItemId(theItemId)) {
      cart.incrementQuantityByItemId(theItemId);
    } else {
    	ItemDAO dao=new ItemDAO();
      Item item = dao.getItemById(theItemId);
      cartForm.getCart().addItem(item);
    }

    return mapping.findForward("success");    
		
	}
}