[JAVA] Upload file URL

    import java.io.*;

import java.net.HttpURLConnection;

import java.net.URL;

public class FileUploader {

    public static void main(String[] args) {

        String uploadUrl = "YOUR_UPLOAD_URL";

        File fileToUpload = new File("YOUR_FILE_PATH");

        try {

            URL url = new URL(uploadUrl);

            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            connection.setRequestMethod("POST");

            connection.setDoOutput(true);

            connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW");

            try (OutputStream outputStream = connection.getOutputStream();

                 FileInputStream fileInputStream = new FileInputStream(fileToUpload)) {

                

                // Write the multipart form data boundary

                String boundary = "----WebKitFormBoundary7MA4YWxkTrZu0gW";

                outputStream.write(("--" + boundary + "\r\n").getBytes());

                outputStream.write(("Content-Disposition: form-data; name=\"file\"; filename=\"" + fileToUpload.getName() + "\"\r\n").getBytes());

                outputStream.write(("Content-Type: application/octet-stream\r\n\r\n").getBytes());

                // Write file content

                byte[] buffer = new byte[4096];

                int bytesRead;

                while ((bytesRead = fileInputStream.read(buffer)) != -1) {

                    outputStream.write(buffer, 0, bytesRead);

                }

                // Write the closing boundary

                outputStream.write(("\r\n--" + boundary + "--\r\n").getBytes());

            }

            

            int responseCode = connection.getResponseCode();

            System.out.println("Response Code: " + responseCode);

            if (responseCode == HttpURLConnection.HTTP_OK || responseCode == HttpURLConnection.HTTP_CREATED) {

                System.out.println("File uploaded successfully.");

            } else {

                System.out.println("File upload failed.");

            }

        } catch (IOException e) {

            e.printStackTrace();

        }

    }

}