怎么样用jsp和servlet想结合 根据下面的代码做个简单的  投票小系统     要求：能动态添加和删除候选人的名字：
package vote;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;

public class Vote extends HttpServlet{
    
    protected void doGet(HttpServletRequest req,HttpServletResponse res)
        throws ServletException,IOException{
        PrintWriter out = res.getWriter();
        //通过Cookie判断用户是否投过票
        Cookie[] cookies = req.getCookies();
        if(cookies!=null){
            for(int i=0;i<cookies.length;i++){
                //投过票的用户不允许再投
                if(cookies[i].getName().equals("voted")){
                    out.println("You have already voted!");
                    return;
                }
            }
        }
        //执行投票逻辑
        String candidate = req.getParameter("c");
        ServletContext sc = getServletConfig().getServletContext();
        doVote(candidate,sc);
        //标识用户已投票,重定向到结果页面
        Cookie voted = new Cookie("voted","1");
        voted.setMaxAge(60*10);
        res.addCookie(voted);
        res.sendRedirect("/unit11/result.jsp");
    }
    
    private void doVote(String c,ServletContext sc){
        VoteBox vb = (VoteBox)sc.getAttribute(c);
        if(vb==null){
            vb = new VoteBox();
            vb.insert();
            sc.setAttribute(c,vb);
        }else{
            vb.insert();
        }     
    }
    
    protected void doPost(HttpServletRequest req,HttpServletResponse res)
        throws ServletException,IOException{
        doGet(req,res);            
    }
}


-----------------------------------------------------

package vote;
public class VoteBox{
    private int total = 0;
    
    public synchronized void insert(){
        total++;
    }
    
    public int getTotal(){
        return total;
    }
}



可否 把代码附上啊  急等！