changeorder.java

网上书店网站源代码

package bookshop.bean;
import java.io.*;
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import bookshop.bean.StrClass;
import bookshop.bean.shopcar;
public class ChangeOrder extends HttpServlet{
	public void doGet(HttpServletRequest request,
	HttpServletResponse response)
	 throws ServletException, IOException {
		HttpSession session=request.getSession();
		Vector list=(Vector)session.getAttribute("carList");
		String errInf="";
		String address="";
		int n=list.size();
		for(int i=0;i<n;i++){
			shopcar car=(shopcar)list.elementAt(i);
			String BookNo=car.getBookNo();
			if(request.getParameter(BookNo)!=null){
				StrClass str=new StrClass(request.getParameter(BookNo));
				if(str.isNum()){
					int num=Integer.parseInt(request.getParameter(BookNo));
					if(num==0){
						list.removeElementAt(i);
					}else{
						car.setquanlity(num);
						list.setElementAt(car,i);
					}
					}else{
						errInf="shuru";
					}
					break;
				}
			}
			session.removeAttribute("carList");
			if(list.size()!=0){
				session.setAttribute("carList",list);
			}
			request.setAttribute("errInf",errInf);
		RequestDispatcher dispatcher=request.getRequestDispatcher("/myCart.jsp");
		dispatcher.forward(request,response);
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException
	{
		doGet(request,response);
	}
}