测试服务器响应时间

所谓的响应时间，就是从客户端开始发出请求到服务器最后返回请求时所消耗的时间，见代码

package com.speed; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.IOException; import java.io.InputStreamReader; import java.lang.reflect.Array; import java.net.URL; public class TestServer { static int loopTimes = 500; public Parameter readFromArgFile(String str) { FileInputStream fileInput; BufferedReader br; Parameter param = new Parameter(); try { fileInput = new FileInputStream(new File(str)); br = new BufferedReader(new InputStreamReader(fileInput)); String line; while ((line = br.readLine()) != null) { if (line.startsWith("URL") == true && line.indexOf("=") >= 3) { int f = line.indexOf("="); String urlstring = line.substring(f + 1); urlstring.trim(); param.url = new URL(urlstring); } else if (line.startsWith("METHOD") == true && line.indexOf("=") >= 3) { int f = line.indexOf("="); String method = line.substring(f + 1); method.trim(); param.method = method; } else if (line.indexOf("=") != -1) { int f = line.indexOf("="); String key = line.substring(0, f - 1); String value = line.substring(f + 1); param.addPair(key.trim(), value.trim()); } } fileInput.close(); br.close(); } catch (FileNotFoundException e) { System.out.println("File" + str + "not found."); } catch (NullPointerException e) { } catch (IOException e) { System.out.println(e); } return param; } public static void main(String[] args) { int i; int j; Parameter param; TestServer tester = new TestServer(); for (i = 0; i < Array.getLength(args); i++) { param = tester.readFromArgFile(args[i]); for (j = 0; j < loopTimes; j++) { Thread th = new Thread(new TestThread(param)); th.start(); } } } }  

 

package com.speed; import java.io.BufferedReader; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.util.Date; public class TestThread implements Runnable { Parameter param; TestThread(Parameter par) { param = par; } public void run() { long time1 = new Date().getTime(); try { URL target = param.url; HttpURLConnection conn = (HttpURLConnection) target .openConnection(); conn.setRequestMethod(param.method); int i; for (i = 0; i < param.length; i++) { conn.setRequestProperty(param.key[i], param.value[i]); } conn.connect(); BufferedReader in = new BufferedReader(new InputStreamReader(conn .getInputStream())); String inputLine; while ((inputLine = in.readLine()) != null); } catch (Exception e) { } long time2 = new Date().getTime(); System.out.println((time2 - time1)/1000+"秒"); } }  

 

由于这个是在命令行模式下运行的，我的附件是这样写的

URL=http://mail.163.com METHOD=GET User-Agent=Internet Explorer Host=mail.163.com Accept=image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/x-shockwave-flash, application/msword, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/x-silverlight, */* Accept-Language=zh-cn Content-Type=application/x-www-form-urlencoded Accept-Encoding=gzip, deflate User-Agent=Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; Foxy/1; .NET CLR 2.0.50727;MEGAUPLOAD 1.0) Connection=Keep-Alive Cache-Control=no-cache 

 

我们来测试一下163的邮件服务器，最后响应时间为14秒，可是单独打开网页的话马上就出现页面了，难道是ajax的过吗？提前展现页面？