java.net.ConnectException only on Windows

Question

我正在尝试做一个小的java应用程序，它下载一些图片，然后将它们计算成一个。（所以一个解谜者）它在 Linux 上运行良好，但是我得到了这个堆栈跟踪（加上几行）。我不知道为什么这在Linux（Ubuntu KDE 17.10）上工作，而不是在Windows（10）上工作。谷歌搜索没有帮助，因为我总是登陆与 Minecraft 相关的问题，到目前为止还没有帮助我。

我正在使用jdk1.8.0_131。

感谢您的努力！

这是下载方法：

public byte[] download(URL url) {
        byte[] response = null;
        try {
            InputStream in = new BufferedInputStream(url.openStream());
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            byte[] buf = new byte[1024];
            int n = 0;
            while (-1 != (n = in.read(buf))) {
                out.write(buf, 0, n);
            }
            out.close();
            in.close();
            response = out.toByteArray();
        } catch (IOException e) {
            Platform.runLater(() -> Alerts.ExceptionDialog(e,"IOException","Fehler bei der Verbindung"));
        }
        return response;
    }

下面是堆栈跟踪：

java.net.ConnectException: Connection timed out: connect
    at java.net.DualStackPlainSocketImpl.connect0(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at java.net.Socket.connect(Socket.java:538)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
    at sun.net.www.http.HttpClient.New(HttpClient.java:339)
    at sun.net.www.http.HttpClient.New(HttpClient.java:357)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1202)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1138)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1032)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:966)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1546)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474)
    at java.net.URL.openStream(URL.java:1045)

Answer 1

我想从中获取文件的站点处于脱机状态，而我测试了我的程序&&我的程序发送到服务器的许多请求。