如何計算java中網站的響應時間

Question

我正在嘗試構建一個網站監控系統。我需要計算網站響應或總加載時間所花費的時間。

Answer 1

如果要計算http請求和響應之間的往返行程，可以使用apache http components。這曾經被稱爲Apache HTTP客戶端。

下面是我用於提出請求的一些示例代碼。您可以在請求前後抓取時間戳。

HttpClient httpclient = new DefaultHttpClient(); 
    URIBuilder builder = new URIBuilder(); 
    URI uri = null; 
    HttpEntity entity = null; 
    InputStream inputStream = null; 
    JSONObject jsonObject = null; 
    URL url = this.getClass().getClassLoader().getResource("json" + File.separator + "newInstall.json"); 
    try { 
     String json = FileUtil.readFile(url.getPath()); 
     builder.setScheme("http").setHost(host).setPort(8080).setPath(basePath + authResource) 
       .setParameter("sig", "sig").setParameter("params", json); 
     uri = builder.build(); 
     log.info("uri: {}", uri); 
     HttpGet httpget = new HttpGet(uri); 
     HttpResponse response = httpclient.execute(httpget); 
     entity = response.getEntity(); 
     if (entity != null) { 
      inputStream = entity.getContent(); 
      String jsonString = IOUtils.toString(inputStream, "UTF-8"); 
      jsonObject = new JSONObject(jsonString); 
      log.info("auth response: {}", jsonString); 
     } 
    } catch (Exception e) { 
     log.error("error", e); 
    }finally { 
     if(inputStream != null) { 
      try { 
       inputStream.close(); 
      }catch(Exception ex) { 
       log.error("error closing input stream", ex); 
      } 
     } 
    }