[Java] 不可逆加密MD5

public static String MD5(String text){
String md5Text = "";
try {
  MessageDigest digest = MessageDigest.getInstance("MD5");
  md5Text = new BigInteger(1,digest.digest((text).getBytes()))
.toString(16);
} catch (Exception e) {
  System.out.println("Error in call to MD5");
}

if (md5Text.length() == 31) {
  md5Text = "0" + md5Text;
}
  return md5Text;
}

出處來自 Yahoo BBAuth 的開放碼