An example of command-line login into a web server using Java

WebLogin.java

import java.io.*;
import java.net.*;

public class WebLogin {

	public static String login(String username, String password) {
		//TODO: Add version parameter.
		String parameters = "username="+username+"&password="+password;
		HttpURLConnection connection = null;
		try {
			connection = (HttpURLConnection) new URL("http://www.4ytech.com/usr/javaLogin.php").openConnection();
			connection.setRequestMethod("POST");
			connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

			connection.setRequestProperty("Content-Length",	Integer.toString(parameters.getBytes().length));
			connection.setRequestProperty("Content-Language", "en-US");

			connection.setUseCaches(false);
			connection.setDoInput(true);
			connection.setDoOutput(true);

			DataOutputStream out = new DataOutputStream(connection.getOutputStream());
			out.writeBytes(parameters);
			out.flush();
			out.close();

			BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
			String response = in.readLine();
			in.close();
			return response;
		} catch (Exception e) {
			return "Error: Unable to connect to 4ytech.com.";
		} finally {
			if (connection != null) {
				connection.disconnect();
			}
		}
	}

	public static void main(String[] args) {
		Console c = System.console();
		while (true) {
			String username = c.readLine("Username: ");
			String password = c.readLine("Password: ");
			System.out.println(login(username, password));
			System.out.println();
		}
	}
}