ajax测下载速度
前台
<%@ page contentType="text/html;charset=UTF-8" language="java"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head> ???<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> ???<title>测试网速</title></head><script type="text/javascript" src="./js/jquery-1.9.1.js"></script><script type="text/javascript"> ????????function Network(){ ???????checkSpeed(); ???} ???????function checkSpeed(){ ???????var a = window.setTimeout("ajaxLoad()",100); ???} ???????function ajaxLoad( ){ ???????var param = {}; ???????var downPath = "<%=request.getContextPath()%>/TestSpeedServlet"; ???????var sumDownLoad = 0.000; ???????var download = 0.000; ???????var flag = true; ???????if(flag){ ???????????loop1:for(var i=0;i<10;i++){ ???????????????//测试下载速度 ???????????????var startDownLoadTime =new Date(); ???????????????$.ajax({ ???????????????????type:"post", ???????????????????url :downPath, ???????????????????async:false, ???????????????????data: { "xmlDown": param},//1代表上传，2代表下载 ???????????????????success: function (data) { ???????????????????????var endDownTime =new Date(); ?????????????????????????var a = data; ???????????????????????if(a.localeCompare("error")==0){ ???????????????????????????alert("测试网速的人数过多！请您稍后再试"); ????????????????????????????flag = false; ???????????????????????????return loop1; ???????????????????????}else{ ???????????????????????????var usedDownTime = (endDownTime-startDownLoadTime)/1000; ?//两个时间戳相差的毫秒数 ?????????????????????????????var dowmSpeed = 1000/usedDownTime;//1000Kb ???????????????????????????sumDownLoad+=dowmSpeed; ???????????????????????} ???????????????????}, ???????????????????error : function(data) { ??????????????????????????alert("测试网速的人数过多！请您稍后再试"); ??????????????????????????flag = false; ????????????????????????return loop1; ???????????????????} ?????????????????}); ???????????} ???????} ???????download = sumDownLoad/10; ???????document.getElementById("downloadSpeed").value=download; ???} ???//数据的转换 ???function transLoad(upload){ ???????if(upload>=1024){ ???????????upload=upload/1024; ???????????upload = upload.toFixed(3); ???????????upload = upload+"MB/s" ???????}else{ ???????????upload = upload.toFixed(3); ???????????upload = upload+"K/s" ???????} ???????return upload ???}</script><body> ???<style> ???????#title { ??????????font-size: 25px; ??????????font-weight:bold; ??????????????????????font-family:"Microsoft Yahei"; ???????} ???????.option{ ???????????font-size:20px; ???????????font-family:"Microsoft Yahei"; ???????} ???????????????td{ ?????????????border:1.5px solid gray; ?????????} ???????#title{ ????????????background-color:#a7c9f1; ???????} ???????????????.loading{width: 100%;filter:alpha(opacity=80); height: 100%;background-color:gray;position: fixed;top:0;left:0;bottom:0;right:0;z-index: 99;display: none;} ???????.loading img{display: block;width: 400px;height: 200px;position: fixed;top:40%;left: 40%;margin-left: -75px;margin-top: -75px;} ???</style> ???????<table width="400" border="5" align="center" > ??????????<tr> ????????????<td ?colspan="2" align="center" id="title"><B>测试网速</B></td> ??????????</tr> ??????????<tr> ??????????????<td class="option" id="upload" align="center">上传速度</td> ??????????????<td><input type="text" name="uploadSpeed" id="uploadSpeed" size="25"/> ??????????????</td> ??????????</tr> ??????????<tr> ??????????????<td class="option" id="download" align="center">下载速度</td> ??????????????<td><input ?type="text" name="downloadSpeed" id="downloadSpeed" size="25" /> ??????????????</td> ??????????</tr> ??????????<tr> ????????????<td colspan="2" align="center" class="option"> ???????????????<input ?type="button" name="testNetworkSpeed" value="测网速" ?onClick="Network()" /> ????????????</td> ??????????</tr> ????</table> ????<div class="loading" style="display: none;"> ???????<img src="../../../../images/ee.gif"> ????</div> ?</body></html>后台
package test;import java.io.File;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 org.apache.commons.io.FileUtils;import org.json.JSONObject;public class TestSpeedServlet extends HttpServlet { ???????protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ???????doPost(request, response); ???} ???static String testString = ""; ???????static { ???????try { ???????????long sizeOf = FileUtils.sizeOf(new File("d:/temp3/eee.xml"));//eee.xml中为1024个英文字符 ???????????testString = FileUtils.readFileToString(new File("d:/temp3/eee.xml"),"GBK");// windows ???????????// testString = FileUtils.readFileToString(new File("/tmp/bbb.txt"));//linux ???????????int fileSize = testString.length(); ???????????System.out.println(String.format("文件大小%dByte,%d/1024=%fKb",fileSize,fileSize,fileSize/1024.0)); ???????} catch (IOException e) { ???????????e.printStackTrace(); ???????} ???} ???protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { ???????try { ???????????JSONObject joStr = new JSONObject(); ???????????joStr.put("result", testString); ???????????PrintWriter out = response.getWriter(); ???????????out.print(joStr); ???????????out.close(); ???????} catch (Exception e) { ???????????e.printStackTrace(); ???????} ???????return; ???}}ajax测网速
原文地址：https://www.cnblogs.com/bobo1713930654/p/8242279.html