那位大哥提供个计数器程序给我啊，最好不用javabean

import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.io.*;public class counter extends HttpServlet{
  int cnt;  public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {
      HttpSession httpsession=request.getSession(true);
      displayCount(httpsession);
  }
  public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
  {  }
  public int displayCount(HttpSession httpsession)
  {
      readCount();
      //if (httpsession.isNew())
      if (httpsession.getCreationTime()==httpsession.getLastAccessedTime())
          cnt++;
      writeCount();
      return cnt;
  }
  public void readCount()
  {
    try
    {
      FileReader fr=new FileReader ("count.txt");
      BufferedReader br=new BufferedReader(fr);
      String initial_cnt=br.readLine();
      cnt=Integer.parseInt(initial_cnt);
      return;
    }
    catch (Exception e)
    {
      //System.out.print(e);
      //cnt=5;
    }
  }  public void writeCount()
  {
    try
    {
      FileWriter fr=new FileWriter("count.txt");
      String initial_cnt=Integer.toString(cnt);
      fr.write(initial_cnt,0,initial_cnt.length());
      fr.close();
      return;
    }
    catch (Exception e)
    {
    }
  }
}