File file = new File("path/to/file");
byte[] fileData = new byte[(int) file.length()];
try (FileInputStream fileInputStream = new FileInputStream(file)) {
fileInputStream.read(fileData);
} catch (IOException e) {
e.printStackTrace();
}
byte[] encodedFileData = Base64.getEncoder().encode(fileData);
byte[] decodedFileData = Base64.getDecoder().decode(encodedFileData);
try (FileOutputStream fileOutputStream = new FileOutputStream("path/to/outputfile")) {
fileOutputStream.write(decodedFileData);
} catch (IOException e) {
e.printStackTrace();
}
