public class Server {
    public static void main(String[] args) {
        try {
            ServerSocket serverSocket =  new ServerSocket(8888);
            System.out.println("服務器即將啟動，等待客戶端的連接");
            Socket socket = serverSocket.accept();
            InputStream is = socket.getInputStream();
            InputStreamReader isr 
 
= new InputStreamReader(is);
            BufferedReader br = new BufferedReader(isr);
            String info = null;
            while ((info=br.readLine())!=null) {
                System.out.println("我是服務器，客戶端說" + info);
            }
            br.close();
            isr.close();
            is.close();
            socket.close();
            serverSocket.close();
        } 
 
catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

public class Client {
    public static void main(String[] args) {
        try {
            Socket socket = new Socket("localhost",8888);
            OutputStream os 
 
= socket.getOutputStream();
            PrintWriter pw = new PrintWriter(os);
            pw.write("用戶名:admin;密碼:123");
            pw.flush();
            socket.shutdownOutput();
            pw.close();
            os.close();
            socket.close();
        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

通過TCP進行通信