orderservlet.java

用java+Ajax做的图书商城

package shoppcart;

import java.io.IOException;
import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.Iterator;

import javax.servlet.*;
import javax.servlet.http.*;

public class OrderServlet extends HttpServlet {
    private static final String CONTENT_TYPE = "text/html; charset=UTF-8";

    public void init(ServletConfig config) throws ServletException {
        super.init(config);
    }

    public void doGet(HttpServletRequest request, 
                      HttpServletResponse response) throws ServletException, IOException {
        response.setContentType(CONTENT_TYPE);
        HttpSession session=request.getSession(true);
        User user = (User)session.getAttribute("user");
        Product product;
        Order order;
        if(user==null){
            response.sendRedirect("login.htm");
        }
        else{
            ArrayList<Product> list=(ArrayList<Product>)session.getAttribute("list");
            ArrayList<BookCount> counts=(ArrayList<BookCount>)session.getAttribute("counts");
            Iterator iterator=list.iterator();
            while(iterator.hasNext()){
               product=(Product)iterator.next();
               for(int i=0;i<counts.size();i++){
                    if(product.getID().equals(counts.get(i).getProductID())){
                        order=new Order();
                        order.setOwnerID(user.getID());
                        order.setProductID(product.getID());
                        order.setProductCount(counts.get(i).getCount());
                        order.serial(); 
                    }
               }
            }
            response.sendRedirect("PrintOrder.htm");
        }
    }
}