Spring Framework example source code file (UpdateCartQuantitiesController.java)

This example Spring Framework source code file (UpdateCartQuantitiesController.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Spring Framework tags/keywords

cart, cart, cartitem, cartitem, controller, exception, http, httpservletresponse, iterator, modelandview, modelandview, numberformatexception, request, response, servlet, string, updatecartquantitiescontroller, updatecartquantitiescontroller, util

The Spring Framework UpdateCartQuantitiesController.java source code

package org.springframework.samples.jpetstore.web.spring;

import java.util.Iterator;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.samples.jpetstore.domain.Cart;
import org.springframework.samples.jpetstore.domain.CartItem;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
import org.springframework.web.util.WebUtils;

/**
 * @author Juergen Hoeller
 * @since 30.11.2003
 */
public class UpdateCartQuantitiesController implements Controller {

	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) throws Exception {
		Cart cart = (Cart) WebUtils.getOrCreateSessionAttribute(request.getSession(), "sessionCart", Cart.class);
		Iterator cartItems = cart.getAllCartItems();
		while (cartItems.hasNext()) {
			CartItem cartItem = (CartItem) cartItems.next();
			String itemId = cartItem.getItem().getItemId();
			try {
				int quantity = Integer.parseInt(request.getParameter(itemId));
				cart.setQuantityByItemId(itemId, quantity);
				if (quantity < 1) {
					cartItems.remove();
				}
			}
			catch (NumberFormatException ex) {
				// ignore on purpose
			}
		}
		request.getSession().setAttribute("sessionCart", cart);
		return new ModelAndView("Cart", "cart", cart);
	}

}