shopcartlistener.java

本系统是网上购物的详细代码

package cn.com.tarena.ecport.web.listener;

import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpSessionEvent;
import javax.servlet.http.HttpSessionListener;

import cn.com.tarena.ecport.biz.IShoppingCart;
import cn.com.tarena.ecport.biz.impl.ShoppingCartImpl;

public class ShopCartListener implements HttpSessionListener {

	public void sessionCreated(HttpSessionEvent event) {
		HttpSession session = event.getSession();
		IShoppingCart isc = new ShoppingCartImpl();
		session.setAttribute("ShopCart", isc);
	}

	public void sessionDestroyed(HttpSessionEvent event) {
		HttpSession session = event.getSession();
		@SuppressWarnings("unused")
		IShoppingCart isc = (IShoppingCart)session.getAttribute("ShopCart");
		session.removeAttribute("ShopCart");
		isc = null;
	}

}