socket连接

class SocketTest {
    public void socketTest() {
        try {
            Socket socket = new Socket(InetAddress.getByName("localhost"), 12345);
            PrintWriter out = new PrintWriter(
                    new BufferedWriter(
                            new OutputStreamWriter(
                                    socket.getOutputStream())));
            out.println("hello");
            out.flush();
            BufferedReader in = new BufferedReader(
                    new InputStreamReader(
                            socket.getInputStream()));
            String line;
            line = in.readLine();
            System.out.println(line);
            out.close();
            in.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}