使用 session 来统计 访问 次数

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * 使用session 来统计 访问应用的次数；
 *
 * @author
 *
 */
public class SessionServlet extends HttpServlet {

 public void service(HttpServletRequest request, HttpServletResponse response)
   throws ServletException, IOException {

  response.setContentType("text/html;charset=utf-8");
  request.setCharacterEncoding("utf-8");
  PrintWriter out = response.getWriter();

  HttpSession session = request.getSession();

  System.out.println(session.getId());// 打印session ID

  Integer count = (Integer)