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基于servlet实现统计网页访问次数

作者：一只小小的蚂蚁　　发布时间：2021-11-05 08:35:13　

标签：servlet,统计,访问次数

本文实例为大家分享了基于servlet实现统计网页访问次数的具体代码，供大家参考，具体内容如下

一、基础知识

（1）ServletContext和ServletConfig的区别

ServletContext作为整个web应用的共享数据
ServletConfig只是作为当前servlet的数据共享，下一个servlet访问时，是访问不到的

二、代码实现

将显示的统计次数显示在HTML页面上：

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

import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
* Servlet implementation class countServlet1
*/
@WebServlet("/countServlet1")
public class countServlet1 extends HttpServlet {
   private static final long serialVersionUID = 1L;

/**
* @see HttpServlet#HttpServlet()
*/
public countServlet1() {
super();
// TODO Auto-generated constructor stub
}

   /**
   * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
   */
   protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       //设置字符编码
       request.setCharacterEncoding("utf-8");
       response.setCharacterEncoding("utf-8");
       response.setContentType("text/html; charset=utf-8");

       //获取全局的共享数据
       ServletContext servletContext = this.getServletContext();

       //获取计数器count
       Integer count = (Integer) servletContext.getAttribute("count");

       //如果获取的计算器对象为空，说明是第一次访问，并将count，放入servletCount
       if( servletContext.getAttribute("count") == null) {
           count = 1;
           servletContext.setAttribute("count", count);
       }else {
           //否则就不是第一次访问，将登陆的计数器进行加1的数据更新
           servletContext.setAttribute("count", count+1);
       }

       //将登陆的次数显示在页面上
       PrintWriter out =response.getWriter();
       out.print("<!DOCTYPE html>\r\n" +
               "<html>\r\n" +
               "<head>\r\n" +
               "<meta charset=\"UTF-8\">\r\n" +
               "<title>登陆网页次数统计</title>\r\n" +
               "</head>\r\n" +
               "<body>");
       out.print("<h1>");
       out.print("您是第 "+ servletContext.getAttribute("count")+"位访客");
       out.print("<h1>");
       out.print("</body>\r\n" +
               "</html>

}

   /**
   * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
   */
   protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
       // TODO Auto-generated method stub
       doGet(request, response);
   }

}

三、在不同浏览器显示的次数

（1）在eclipse中显示的次数

（2）在火狐中显示的次数

（3）在360中显示的次数

来源：https://blog.csdn.net/qq_44863179/article/details/105326425

投稿

基于servlet实现统计网页访问次数

一、基础知识

二、代码实现

三、在不同浏览器显示的次数

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