MD5加密

最新推荐文章于 2017-10-24 10:58:18 发布

转载最新推荐文章于 2017-10-24 10:58:18 发布 · 927 阅读

文章标签：

#加密 #hex #string #byte #c

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

public static String toHexString(byte[] b) {  //String to  byte
   StringBuilder sb = new StringBuilder(b.length * 2);
   for (int i = 0; i < b.length; i++) {
      sb.append(HEX_DIGITS[(b[i] & 0xf0) >>> 4]);
      sb.append(HEX_DIGITS[b[i] & 0x0f]);
   }
   return sb.toString();
}
   public String md5(String s) {
         try {
            // Create MD5 Hash
            MessageDigest digest = java.security.MessageDigest.getInstance("MD5");
            digest.update(s.getBytes());
            byte messageDigest[] = digest.digest();

               return toHexString(messageDigest);
         } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
         }

         return "";
      }