📄 counter.java
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/*
* Counter.java
*
* Created on 2007年10月19日, 下午5:05
*/
package com.servlet;
import java.io.*;
import java.net.*;
import javax.servlet.*;
import javax.servlet.http.*;
/**
*
* @author hyl
* @version
*/
public class Counter 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=UTF-8");
PrintWriter out = response.getWriter();
String history =(String)getServletContext().getAttribute("Counter");
if( history==null) history="0";
// int last=Integer.parseInt( history);
String temp =(String)getServletContext().getAttribute("online");
if(temp==null)temp="0";
//int online=Integer.parseInt(temp);
out.println("<html>");
out.println("<head>");
out.println("<title>计数器</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>当前访问人数： " + temp + "</h1>");
out.println("<h1>历史访问人数： " + history + "</h1>");
out.println("</body>");
out.println("</html>");
out.close();
}
// <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>
}
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