Java网络服务扫描器

我正在尝试编写一个类，该类将扫描本地网络以查找将要运行的服务

问题是，如果地址不是活动的，没有回复，它会挂起它5秒钟以上，这是不好的

我想在几秒钟内完成这个扫描。有人能提供一些建议吗

下面是我的代码部分

        int port = 1338;
    PrintWriter out = null;
    BufferedReader in = null;

    for (int i = 1; i < 254; i++){

        try {
            System.out.println(iIPv4+i);
            Socket kkSocket = null;

            kkSocket = new Socket(iIPv4+i, port);

            kkSocket.setKeepAlive(false);
            kkSocket.setSoTimeout(5);
            kkSocket.setTcpNoDelay(false);  

            out = new PrintWriter(kkSocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(kkSocket.getInputStream()));
            out.println("Scanning!");
            String fromServer;
            while ((fromServer = in.readLine()) != null) {
                System.out.println("Server: " + fromServer);
                if (fromServer.equals("Server here!"))
                    break;
            }

        } catch (UnknownHostException e) {

        } catch (IOException e) {

        }
    }

谢谢你的回答！这是我的代码，供其他任何人查找

        for (int i = 1; i < 254; i++){

        try {
            System.out.println(iIPv4+i);
            Socket mySocket = new Socket();
            SocketAddress address = new InetSocketAddress(iIPv4+i, port);

            mySocket.connect(address, 5);   

            out = new PrintWriter(mySocket.getOutputStream(), true);
            in = new BufferedReader(new InputStreamReader(mySocket.getInputStream()));
            out.println("Scanning!");
            String fromServer;
            while ((fromServer = in.readLine()) != null) {
                System.out.println("Server: " + fromServer);
                if (fromServer.equals("Server here!"))
                    break;
            }

        } catch (UnknownHostException e) {

        } catch (IOException e) {

        }
    }

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您可以尝试通过调用显式连接到服务器

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您可以尝试通过调用显式连接到服务器

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您可以使用noarg构造函数创建一个未连接的套接字，然后使用一个小的超时值进行调用

Socket socket = new Socket();
InetSocketAddress endpoint = new InetSocketAddress("localhost", 80);
int timeout = 1;
socket.connect(endpoint, timeout);

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您可以使用noarg构造函数创建一个未连接的套接字，然后使用一个小的超时值进行调用

Socket socket = new Socket();
InetSocketAddress endpoint = new InetSocketAddress("localhost", 80);
int timeout = 1;
socket.connect(endpoint, timeout);

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谢谢你的建议，我要试试看！谢谢你的建议，我要试试看！超时以毫秒为单位，因此1秒超时应等于1000。超时以毫秒为单位，因此1秒超时应等于1000。