收听9100打印

Question

How can i listen to raw printer port 9100 in Java.

When i create ServerSocket on port 9100 and accept connection nothing happens when i try to print to this port.

System.out.println("listening on 9100");
    try {
        ServerSocket serverSocket = new ServerSocket(9100);
        serverSocket.setSoTimeout(0);
        serverSocket.accept();
        System.out.println("Accepted connection");
    } catch (IOException e) {
        e.printStackTrace();
    }

EDIT: "Accepted connection" is never printed. So the socket is never initiated

Answer 1

You're ignoring the return value from serverSocket.accept() .
This gives you back a socket. Seems you're not using it at all.

ServerSocket.accept

From that socket you then need to get input/output streams,
and then you can communicate with the client over these streams.