JAVA MD5

原创于 2011-05-12 17:45:36 发布 · 91 阅读

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private final static char[] hexDigits = { '0', '1', '2', '3', '4', '5',
'6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };

private static String bytesToHex(byte[] bytes) {
     StringBuffer sb = new StringBuffer();
     int t;
     for (int i = 0; i < 16; i++) {// 16 == bytes.length;

         t = bytes[i];
         if (t < 0)
             t +=256;
         sb.append(hexDigits[(t >>> 4)]);
         sb.append(hexDigits[(t % 16)]);
     }
     return sb.toString();
}

public static String getMD5(String input) {
     try {
         MessageDigest md = MessageDigest.getInstance("MD5");
         return bytesToHex(md.digest(input.getBytes()));

     } catch (NoSuchAlgorithmException e) {
         e.printStackTrace();

     }
     return null;
}