surebuy.java

在网上书店买书

package Controller;
/*
 * SureBuy.java
 *
 * Created on 2008年5月11日, 下午2:32
 */

import java.io.*;
import java.net.*;

import javax.servlet.*;
import javax.servlet.http.*;
import java.sql.*;
import Model.DataOperation;
import Model.Book;
import Model.Basket;
import Model.User;
import java.util.Date;
import java.text.*;
import java.util.Iterator;
import java.util.ArrayList;
/**
 *
 * @author Administrator
 * @version
 */
public class SureBuy extends HttpServlet {
    
    /** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        Basket basket=(Basket)request.getSession(true).getAttribute("basket");
        User user=(User)request.getSession(true).getAttribute("user");
        DataOperation db=new DataOperation();
        Date d = new Date(); 
        SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd");
        String str=sdf.format(d); 
        try
        {
            Connection con=db.getConnection();
            Statement st=con.createStatement();
            ResultSet rs=st.executeQuery("select * from orders");
            con.setAutoCommit(false);
            rs.last();
            int orderID=1;
            if(rs.last())
            {
                orderID=rs.getInt("OrderID")+1;
            }
            double cost=5.00;
            String orderSql="insert into orders values("+orderID+",'"+user.getUserID()+"','"+str+"',"+cost+")";
            st.executeUpdate(orderSql);
             ResultSet rss=st.executeQuery("select * from orderItem");
            rss.last();
            int orderItem=0;
            if(rss.last())
            {
                orderItem=rss.getInt("OrderItemID");
            }
            ArrayList books=basket.getBooks();
            Iterator iterator=books.iterator();
            while(iterator.hasNext())
            {
                  orderItem++;
                Book book=(Book)iterator.next();
                String isbn=book.getISBN();
                String orderItemSql="insert into orderItem values("+orderItem+",'"+isbn+"',"+orderID+","+book.getQuanty()+")";
                st.executeUpdate(orderItemSql);
            }
            con.commit();
          response.sendRedirect("SucessFull.jsp");
        }
        catch(Exception e)
        {
            out.println("购买失败，请稍候再试！");
        }
        out.close();
    }
    
    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }
    
    /** Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }
    
    /** Returns a short description of the servlet.
     */
    public String getServletInfo() {
        return "Short description";
    }
    // </editor-fold>
}