printorderservlet.java

用java+Ajax做的图书商城

package shoppcart;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
public class PrintOrderServlet extends HttpServlet {
    public void doGet(HttpServletRequest request, 
                      HttpServletResponse response) throws ServletException, IOException {
       
       response.setContentType("application/xml; charset=utf-8");
       PrintWriter out = response.getWriter(); 
       response.setHeader("Cache-Control","no-cache");
       HttpSession session=request.getSession(true);
       User user = (User)session.getAttribute("user");
        Order order=null;
        Product product=null;
        StringBuffer content=null;
        if(user==null){
            out.print("login");
        }
        else{
            content=new StringBuffer(""); 
            content.append("<?xml version=\"1.0\"   encoding=\"utf-8\" ?>");
            content.append("<orderlist>");
            
            List<Order> orderList=Order.getOrderList(user.getID());
            Iterator iterator=orderList.iterator();
           while(iterator.hasNext()){
                order = (Order)iterator.next();
                product=new Product(order.getProductID());
                content.append("<order>");
                 content.append("<name>" + product.getName() + "</name>");
                content.append("<price>" + product.getPrice() + "</price>");
                content.append("<count>" + order.getProductCount() + "</count>");
                content.append("</order>");
            }         
            content.append("</orderlist>");
            out.print(content);
       }
    }
}