抛出SocketTimeoutException

Question

'java.net.SocketTimeoutException：connect timed out'
我在循环一段时间后得到这个错误。 为什么我得到SocketTimeoutException？我怎么能解决这个错误？

@Override
public void run() {
    while (true) {
        try {
            URLConnection connection = getURLConnection("http://www.trekpv.com");
            BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String s;
            while ((s = reader.readLine()) != null) {
                System.out.println(s);
            }
            reader.close();
            Thread.sleep(5000);
        }   catch (Exception e) {
            e.printStackTrace();
        }
    }
}

private URLConnection getURLConnection(String s) throws IOException {
    URL url = new URL(s);
    URLConnection urlconnection = url.openConnection();
    urlconnection.setConnectTimeout(10000);
    urlconnection.setReadTimeout(10000);
    urlconnection.addRequestProperty("Connection", "keep-alive");
    urlconnection.addRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20120716 Firefox/15.0a2");
    urlconnection.addRequestProperty("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
    urlconnection.addRequestProperty("Accept-Language", "en-US,en;q=0.8");
    urlconnection.addRequestProperty("Accept-Charset", "ISO-8859-1,utf-8;q=0.7,*;q=0.3");
    return urlconnection;
}

Answer 1

在指定的url未在特定持续时间内获取时发生SocketTimeoutException。这可能是因为互联网连接速度缓慢，或者代码中存在一些错误导致无法getURLConnection("http://www.trekpv.com")功能获取网址。

Answer 2

'连接超时'表示根本没有响应。可能会有防火墙。