java - 抛出 SocketTimeoutException

Question

'java.net.SocketTimeoutException:连接超时'
循环一段时间后我收到此错误。为什么我会收到 SocketTimeoutException？我该如何修复这个错误？

@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

当指定的 url 在一定时间内未获取时，会发生 SocketTimeoutException。出现这种情况的原因可能是互联网连接速度较慢，或者代码中存在某些错误，导致 getURLConnection("http://www.trekpv.com") 函数无法获取 URL。