Question

我正在尝试为访问相应网页内容的网址集合发送HTTP request。但不知何故，对于少数网址，HttpURLConnection没有做任何事情，程序仍处于空闲状态。这是我的代码：

                        while(null != (line = br.readLine())){
                        URL url = new URL(line);
                        openConnection(url);
                            }

             static void openConnection(URL url) {

                       URLConnection connection = url.openConnection();

                          if (connection instanceof HttpURLConnection) {
                        try{
                              httpConn = (HttpURLConnection) connection;

                              httpConn.setConnectTimeout(2000);


                         int statusCode = httpConn.getResponseCode();
                         if (statusCode <= 200 && statusCode < 300)
                         {
                         //do something

                           }

                          }
                               catch (ConnectException|java.lang.IllegalArgumentException ex) { java.util.logging.Logger.getLogger(CreateXMLtest.class.getName()).log(Level.SEVERE, null, ex);}  //catch the possible exception.
                               catch (SSLHandshakeException |SocketException | SocketTimeoutException | UnknownHostException ex) {java.util.logging.Logger.getLogger(CreateXMLtest.class.getName()).log(Level.SEVERE, null, ex);}
                               catch (java.io.IOException ex) { java.util.logging.Logger.getLogger(CreateXMLtest.class.getName()).log(Level.SEVERE, null, ex);} 

               }

          }

由于某些原因，程序在`int statusCode = httpConn.getResponseCode（）;行中空闲。如何防止或至少跳过这种情况？

Answer 1

您可以设置超时：

$scope.tinymceOptions.style_formats = [
{ title: 'test', selector : 'a', classes: 'sampletest'}
];

然后捕获java.net.SocketTimeoutException。

如果在建立连接之前超时到期，则a 引发java.net.SocketTimeoutException。超时为零被解释为无限超时。

请参阅http://docs.oracle.com/javase/1.5.0/docs/api/java/net/URLConnection.html#setConnectTimeout%28int%29

Answer 2

您需要指定套接字读取超时（SO超时）。 Defualt是无限的。因此，如果没有指定，线程将无限期地（理论上）读取。

HttpURLConnection不响应也不抛出异常

2 个答案: