网页计数 

package com.suqinhu.servlet;


import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@WebServlet("")
public class IndexServlet extends HttpServlet {

    static int count = 0;
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        count++;
        resp.setCharacterEncoding("utf-8");
        resp.setContentType("text/html");

        PrintWriter writer = resp.getWriter();
        String template = "<!DOCTYPE html>\n" +
                "<html lang=\"en\">\n" +
                "<head>\n" +
                "    <meta charset=\"UTF-8\">\n" +
                "    <title>首页</title>\n" +
                "</head>\n" +
                "<body>\n" +
                "    <p id=\"content\">::count::</p>\n" +
                "    <script src=\"js/index.js\"></script>\n" +
                "    <script src=\"js/jquery-3.5.0.js\"></script>\n" +
                "</body>\n" +
                "</html>";
        String content = template.replace("::count::",String.valueOf(count));
        writer.println(content);
    }
}

这是自己用来计数网页上有多少人访问的简单实现。

$(function main() {
   setInterval(function () {
       $.get("get-request-count",function (count) {
           $("#content").html(count);
       })
   },5000)
});

在html中引入相关的js文件，一个即为上述，另一个则是JQuery3.5.0。

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>首页</title>
</head>
<body>
    <p id="content">::count::</p>
    <script src="js/index.js"></script>
    <script src="js/jquery-3.5.0.js"></script>
</body>
</html>

::count::在后边会使用相关内容进行替换。

posted @ 2021-01-20 17:59  叁三彡  阅读(107)  评论(0)  编辑  收藏  举报