JAVA

encode file to base64 java

private static String encodeFileToBase64Binary(String fileName) throws IOException {
    File file = new File(fileName);
    byte[] encoded = Base64.encodeBase64(FileUtils.readFileToByteArray(file));
    return new String(encoded, StandardCharsets.US_ASCII);
}

decode base64 to file java

// Note preferred way of declaring an array variable
byte[] data = Base64.decodeBase64(crntImage);
try (OutputStream stream = new FileOutputStream("c:/decode/abc.bmp")) {
    stream.write(data);
}

java base64 to file

byte[] data = Base64.decodeBase64(base64Img);
try (OutputStream stream = new FileOutputStream("c:/xxxx/xxxx.xx")) {
    stream.write(data);
}