联系SMS网关时出现Java套接字连接超时错误

这是我试图通过红氧服务器发送短信的代码

下面是我正在执行的代码 最终字符串requestURL=“”

执行时，我得到以下异常：

java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:525)
at sun.net.NetworkClient.doConnect(NetworkClient.java:158)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:233)
at sun.net.www.http.HttpClient.New(HttpClient.java:306)
at sun.net.www.http.HttpClient.New(HttpClient.java:323)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:860)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:801)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:726)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:904)
at com.nextenders.server.LoginServlet.SendSMS(LoginServlet.java:143)

java.net.ConnectException:连接超时：连接
位于java.net.PlainSocketImpl.socketConnect（本机方法）
位于java.net.PlainSocketImpl.doConnect（PlainSocketImpl.java:333）
位于java.net.PlainSocketImpl.connectToAddress（PlainSocketImpl.java:195）
位于java.net.PlainSocketImpl.connect（PlainSocketImpl.java:182）
位于java.net.socksocketimpl.connect（socksocketimpl.java:366）
位于java.net.Socket.connect（Socket.java:525）
位于sun.net.NetworkClient.doConnect（NetworkClient.java:158）
位于sun.net.www.http.HttpClient.openServer（HttpClient.java:394）
位于sun.net.www.http.HttpClient.openServer（HttpClient.java:529）
http.HttpClient.（HttpClient.java:233）
http.HttpClient.New（HttpClient.java:306）
http.HttpClient.New（HttpClient.java:323）
位于sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient（HttpURLConnection.java:860）
位于sun.net.www.protocol.http.HttpURLConnection.plainConnect（HttpURLConnection.java:801）
位于sun.net.www.protocol.http.HttpURLConnection.connect（HttpURLConnection.java:726）
位于sun.net.www.protocol.http.HttpURLConnection.getOutputStream（HttpURLConnection.java:904）
位于com.nextenders.server.LoginServlet.SendSMS（LoginServlet.java:143）

我尝试增加连接

超时
并关闭防火墙…等等，但没有成功。有人能帮我追踪问题吗

以下是我将要介绍的教程：

我的代码中的“*”是网关的凭据
 以下代码在我使用其他网站进行测试时运行良好（因为我没有访问消息API的权限）：

它将
toString
各种流，并在流未连接时进行错误处理。

最重要的更改是使用
DataOutputStream.writeUTF
方法，而不仅仅是
write
方法-这将确保
POST
数据编码正确。我认为这不是您的问题，因为问题出在
connect


您使用的示例代码似乎不知道Java命名约定或最佳实践，我已经对其进行了大量整理。

可以将流读取器拉出并放入单独的方法中，以避免重复。

我建议您将它指向另一个网站（我使用了我的作品），看看您是否得到了输出。
这是一个网络拓扑问题。您无法从您所在的位置连接到该站点。一些可能是你们自己的防火墙正在阻止它。与您的netadmin交谈。
如果它无法连接，则它无法连接，似乎与代码无关。您可以从运行代码的计算机上访问URL，对吗？不，浏览器中还有一个带有0000的空页面。感谢您的快速响应。但是没有用，仍然是相同的例外。：（使用不同的网站？
java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:525)
at sun.net.NetworkClient.doConnect(NetworkClient.java:158)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:394)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:529)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:233)
at sun.net.www.http.HttpClient.New(HttpClient.java:306)
at sun.net.www.http.HttpClient.New(HttpClient.java:323)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:860)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:801)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:726)
at sun.net.www.protocol.http.HttpURLConnection.getOutputStream(HttpURLConnection.java:904)
at com.nextenders.server.LoginServlet.SendSMS(LoginServlet.java:143)

    final String requestURL = "http://www.redoxygen.net/sms.dll?Action=SendSMS";
    final StringBuilder stringBuilder = new StringBuilder();
    try {
        stringBuilder.append("AccountId=").append(URLEncoder.encode("****", "UTF-8"))
                .append("&Email=").append(URLEncoder.encode("*******", "UTF-8"))
                .append("&Password=").append(URLEncoder.encode("******", "UTF-8"))
                .append("&Recipient=").append(URLEncoder.encode("******", "UTF-8"))
                .append("&Message=").append(URLEncoder.encode("hello", "UTF-8"));
    } catch (UnsupportedEncodingException e) {
        throw new RuntimeException(e);
    }

    final URL address;
    try {
        address = new URL(requestURL);
    } catch (MalformedURLException e) {
        throw new RuntimeException(e);
    }

    final HttpURLConnection connection;
    try {
        connection = (HttpURLConnection) address.openConnection();
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    try {
        connection.setRequestMethod("POST");
    } catch (ProtocolException e) {
        throw new RuntimeException(e);
    }
    connection.setDoInput(true);
    connection.setDoOutput(true);
    connection.setConnectTimeout(100000000);

    try {
        connection.connect();
    } catch (IOException e) {
        throw new RuntimeException(e);
    }

    final DataOutputStream output;
    try {
        output = new DataOutputStream(connection.getOutputStream());
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
    try {
        output.writeUTF(stringBuilder.toString());
    } catch (IOException e) {
        throw new RuntimeException(e);
    }

    final InputStream inputStream;
    try {
        inputStream = connection.getInputStream();
    } catch (IOException e) {
        final char[] buffer = new char[0x10000];
        final StringBuilder stackBuilder = new StringBuilder();
        final Reader in;
        try {
            in = new InputStreamReader(connection.getErrorStream(), "UTF-8");
        } catch (UnsupportedEncodingException ex) {
            throw new RuntimeException(ex);
        }
        try {
            int read;
            do {
                read = in.read(buffer, 0, buffer.length);
                if (read > 0) {
                    stackBuilder.append(buffer, 0, read);
                }
            } while (read >= 0);
            System.out.println("Error response code from server. Error was:");
            System.out.println(stackBuilder.toString());
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        } finally {
            try {
                in.close();
            } catch (IOException ex) {
                throw new RuntimeException(ex);
            }
        }
        throw new RuntimeException(e);
    }

    final char[] buffer = new char[0x10000];
    final StringBuilder stackBuilder = new StringBuilder();
    final Reader in;
    try {
        in = new InputStreamReader(inputStream, "UTF-8");
    } catch (UnsupportedEncodingException ex) {
        throw new RuntimeException(ex);
    }
    try {
        int read;
        do {
            read = in.read(buffer, 0, buffer.length);
            if (read > 0) {
                stackBuilder.append(buffer, 0, read);
            }
        } while (read >= 0);
        System.out.println(stackBuilder.toString());
    } catch (IOException ex) {
        throw new RuntimeException(ex);
    } finally {
        try {
            in.close();
        } catch (IOException ex) {
            throw new RuntimeException(ex);
        }
    }