Servlet和Session统计访问次数

package com.servlet;  
  
import java.io.IOException;  
import java.io.PrintWriter;  
  
import javax.servlet.ServletException;  
import javax.servlet.annotation.WebServlet;  
import javax.servlet.http.Cookie;  
import javax.servlet.http.HttpServlet;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  
import javax.servlet.http.HttpSession;  
  
/** 
 * Servlet implementation class LoginServletTest 
 */  
@WebServlet("/LoginServletTest2")  
public class SessionCounter extends HttpServlet {  
    private static final long serialVersionUID = 1L;  
  
    /** 
     * @throws IOException 
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse 
     *      response) 
     */  
    protected void doGet(HttpServletRequest request,  
            HttpServletResponse response) throws ServletException, IOException {  
        // PrintWriter out = response.getWriter(); IOException {  
        // TODO Auto-generated method stub  
        // doPost(request, response);  
        HttpSession session = request.getSession(true);  
        Object counter = session.getAttribute("Counter");  
        int count = 0;  
        if (counter == null) {  
            response.setContentType("text/html;charset=utf8");  
            request.setCharacterEncoding("utf8");  
            response.getWriter().println("<p>这是你第一次访问本页<p>");  
            count = 1;  
            session.setAttribute("Counter", new Integer(1));  
        } else {  
            count = ((Integer) counter).intValue();  
            count++;  
            session.setAttribute("Counter", new Integer(count));  
            response.setContentType("text/html;charset=utf8");  
            request.setCharacterEncoding("utf8");  
            response.getWriter().println("<p>这是你第</p>" + count + "<p>次访问本页<p>");  
        }  
    }  
  
    /** 
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse 
     *      response) 
     */  
    protected void doPost(HttpServletRequest request,  
            HttpServletResponse response) throws ServletException, IOException {  
        // TODO Auto-generated method stub  
        response.setContentType("text/html;charset=utf-8");  
        request.setCharacterEncoding("utf-8");  
        String name = request.getParameter("name");  
        String passs = request.getParameter("pass");  
        PrintWriter out = response.getWriter();  
        out.println("<HTML>");  
        out.println("  <HEAD><TITLE>用户登录</TITLE></HEAD>");  
        out.println("  <BODY>");  
        if ("123".equals(passs)) {// 假设的合法用户名及密码  
            out.print("<h2>用户登录成功</h2>");  
        } else {  
            out.print("<h2>用户或密码错误，登录失败</h2>");  
        }  
        out.println("  </BODY>");  
        out.println("</HTML>");  
  
    }  
  
}