Question

我有以下服务器：

public final class Server implements Runnable {
    private ServerSocket serverSocket;
    private Socket socket;
    private BufferedReader in;
    private PrintWriter out;

    Server() {
        Thread thread = new Thread(this);
        thread.start();
    }

    @Override
    public void run() {
        boolean running = true;
        try {
            serverSocket = new ServerSocket(5000);
            socket = serverSocket.accept();
            in = new BufferedReader(new InputStreamReader(socket.getInputStream()));

            while (running) {
                String data = in.readLine();
                System.out.println(data);
                if (data.equals("quit")) {
                    running = false;
                }
            }
        } catch (IOException e) {
            System.err.println(e);
        }
    }
}

并关注客户：

public class Client {
    private Socket socket;
    private PrintWriter out;

    public Client() {
        socket = null;

        try {
            socket = new Socket("127.0.0.1", 5000);
            out = new PrintWriter(socket.getOutputStream());
        } catch (final UnknownHostException e) {
            System.err.println("Address unknown "
                               + e.getMessage());
        } catch (final IOException e) {
            System.err.println("Error connecting to the Server "
                               + e.getMessage());
        }
    }

    public void sendMessage(String msg) {
        out.println(msg);
    }
}

我能够建立初始连接，但只要执行sendMessage()方法，服务器就不会打印任何内容。你知道为什么我收不到消息吗？

Answer 1

当客户端使用in.readLine()打印时，服务器使用print()进行读取（无新行）。所以服务器正在等待出现从未发生的新行。

尝试在客户端使用println()进行书写。

此外，您需要刷新您的作者：添加out.flush()。这是使编写器实际发送其有效负载所必需的。

Java Socket Server不读行

1 个答案: