private String MD5(String s) { try { MessageDigest md = MessageDigest.getInstance("MD5"); byte[] bytes = md.digest(s.getBytes("utf-8")); return toHex(bytes); } catch (Exception e) { throw new RuntimeException(e); } } private static String toHex(byte[] bytes) { final char[] HEX_DIGITS = "0123456789ABCDEF".toCharArray(); StringBuilder ret = new StringBuilder(bytes.length * 2); for (int i=0; i<bytes.length; i++) { ret.append(HEX_DIGITS[(bytes[i] >> 4) & 0x0f]); ret.append(HEX_DIGITS[bytes[i] & 0x0f]); } return ret.toString(); }
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