shopcartaction.java

购物车,struts+jdbc 数据库sqlserver2

package org.y2t12.struts.action;

import java.lang.reflect.InvocationTargetException;
import java.util.Collection;
import java.util.Iterator;

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

import org.apache.commons.beanutils.BeanUtils;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
import org.y2t12.beans.ShopBean;
import org.y2t12.service.ShopService;
import org.y2t12.struts.form.ShopCartForm;

public class ShopCartAction extends DispatchAction {
	/**
	 * 向购物车中添加商品
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return
	 */
	public ActionForward addToCart(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		ShopCartForm formBean = (ShopCartForm) form;
		ShopBean bean = new ShopBean();

		try {
			BeanUtils.copyProperties(bean, formBean);
		} catch (IllegalAccessException e) {
			e.printStackTrace();
		} catch (InvocationTargetException e) {
			e.printStackTrace();
		}

		String gotoURL = "";
		HttpSession session = request.getSession();
		ShopService service = (ShopService) session.getAttribute("book");

		if (null == service) {
			service = new ShopService();
		}

		if (service.isExist(bean)) {
			service.addShopCart(bean);
			session.setAttribute("book", service);
			gotoURL = "noexist";
		} else {
			gotoURL = "exist";
		}
		return mapping.findForward(gotoURL);
	}

	/**
	 * 察看购物车
	 * 
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return
	 */
	public ActionForward toViewCart(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		String gotoURL = "no";
		HttpSession session = request.getSession();
		ShopService shopcart = (ShopService) session.getAttribute("book");

		if (null != shopcart) {
			Collection coll = shopcart.getAll();
			session.setAttribute("list", coll);
			session.setAttribute("book", shopcart);
			request.setAttribute("total", new Double(shopcart.getTotal()));
			gotoURL = "yes";
		}
		return mapping.findForward(gotoURL);
	}
	/**
	 * 删除购物车中的物品
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return
	 */
	public ActionForward deleteBook(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		int bookID = Integer.parseInt(request.getParameter("id"));
		System.out.println(bookID);
		
		HttpSession session = request.getSession();
		ShopService shopcart = (ShopService) session.getAttribute("book");
		
		shopcart.removeBook(new Integer(bookID));
		Collection coll = shopcart.getAll();
		
		request.setAttribute("total", new Double(shopcart.getTotal()));
		session.setAttribute("list", coll);
		
		return mapping.findForward("yes");
	}
}