public static String md5(File file)
throws NoSuchAlgorithmException, FileNotFoundException, IOException {
MessageDigest md = MessageDigest.getInstance("MD5");
InputStream is = new FileInputStream(file);
byte[] buffer = new byte[8192];
int read = 0;
while ((read = is.read(buffer)) > 0) md.update(buffer, 0, read);
byte[] md5 = md.digest();
BigInteger bi = new BigInteger(1, md5);
is.close();
String hex = bi.toString(16);
while (hex.length() < 32) {
hex = "0" + hex;
} // Padding
return hex;
}
