buyaction.java

图书商城系统

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package com.tang.struts.action;

import java.io.UnsupportedEncodingException;
import java.util.ArrayList;

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

import org.apache.struts.action.Action;
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 org.apache.struts.action.ActionMessage;

import com.tang.foruse.BookBean;
import com.tang.foruse.BookHandle;
import com.tang.foruse.OrderItem;

/** 
 * MyEclipse Struts
 * Creation date: 05-20-2008
 * 
 * XDoclet definition:
 * @struts.action validate="true"
 * @struts.action-forward name="failure" path="/lolgin.jsp"
 * @struts.action-forward name="success" path="/home.jsp"
 */
public class BuyAction extends Action {
	/*
	 * Generated Methods
	 */

	/** 
	 * �÷������ڴ����û�����book�ϵĹ���ťʱ
	 * ���ﳵ�ϵĸĶ�����ת���û�û��¼ʱ����ת
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		// TODO Auto-generated method stub
		try {
			request.setCharacterEncoding("UTF-8");
		} catch (UnsupportedEncodingException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		String target = "failure";
		int bid = Integer.parseInt(request.getParameter("id"));
		HttpSession session = request.getSession();
		if (session.getAttribute("user") != null) {
			target = "success";
			BookHandle handle = new BookHandle();
			BookBean bean = handle.getBook(bid);
			ArrayList al = null;
			if (session.getAttribute("car") == null||((ArrayList) session.getAttribute("car")).size()==0) {
				al = new ArrayList();
				OrderItem orderitem = new OrderItem(bean, 1);
				al.add(orderitem);
			} else {
				al = (ArrayList) session.getAttribute("car");
				int i = 0;
				for (i = 0; i < al.size(); i++) {
					if (bean.getId() == ((OrderItem) al.get(i)).getBean().getId()) {
						((OrderItem) al.get(i)).increment();
						break;
					}
				}
				if (i == al.size()) {
					OrderItem orderitem = new OrderItem(bean, 1);
					al.add(orderitem);
				}
			}
			
			session.setAttribute("car", al);
		} else {
			ActionErrors errors = new ActionErrors();
			ActionMessage msg = new ActionMessage("����您尚未登录��¼�����ȵ�¼", false);
			errors.add("buy", msg);
			request.setAttribute(org.apache.struts.Globals.ERROR_KEY, errors);
		}
		return mapping.findForward(target);
	}

}