process.java

这个是用jsp编写的投票系统代码

/*
 * process.java
 *
 * Created on 2008年6月4日, 下午9:23
 */

package myservlet;

import java.io.*;
import java.net.*;
import mybean.DBBean;
import java.sql.*;
import javax.servlet.*;
import javax.servlet.http.*;

/**
 *
 * @author Administrator
 * @version
 */
public class Process 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=gb2312");
        DBBean db=new DBBean();
        String user=request.getParameter("user");
        String pw=request.getParameter("ps");
        String sql="select * from admin where name='"+user+"' and password='"+pw+"'";
        ResultSet rs=db.executeQuery(sql);
        try{           
            if(rs.next()){
                rs.close();
                db.close();
                request.getSession().setAttribute("admin","ok");
                RequestDispatcher rd=request.getRequestDispatcher("manager.jsp");
                rd.forward(request,response);
            }
            else{
                rs.close();
                db.close();
                String str="对不起，您的用户名或密码不正确，请重新登录或者";
                request.setAttribute("warning", str);
                RequestDispatcher rd=request.getRequestDispatcher("login.jsp");
                rd.forward(request,response);
            }
        }
        catch(Exception e){
            try{
            rs.close();}
            catch(Exception ee){}
            e.printStackTrace();
        }

       

    }
    
    // <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>
}