How can I implement basic authentication in Java?

How can I implement basic authentication in Java?

You can implement basic authentication in Java using the HttpURLConnection class. Would you like a code example?

Yes, please provide a code example.

Here's a simple example:

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

public class BasicAuthExample {
    public static void main(String[] args) throws Exception {
        String url = "http://example.com/api";
        String user = "username";
        String password = "password";

        String auth = user + ":" + password;
        String encodedAuth = Base64.getEncoder().encodeToString(auth.getBytes());
        URL obj = new URL(url);
        HttpURLConnection con = (HttpURLConnection) obj.openConnection();
        con.setRequestMethod("GET");
        con.setRequestProperty("Authorization", "Basic " + encodedAuth);

        int responseCode = con.getResponseCode();
        System.out.println("Response Code: " + responseCode);
    }
}

This code sets up a basic GET request with authentication.

What if I want to use it with a POST request?

You can modify the request method to POST and include a request body. Here's an example:

con.setRequestMethod("POST");
con.setDoOutput(true);
String jsonInputString = "{\"key\":\"value\"}";
try(OutputStream os = con.getOutputStream()) {
    byte[] input = jsonInputString.getBytes("utf-8");
    os.write(input, 0, input.length);
}

This will send a JSON payload with your POST request.