SHA_1计算消息摘要

 /**
      * SHA_1计算消息摘要
      * @param bytes 待计算数据
      * @return
      */
     public static String SHA_1(byte[] bytes) {
         String encodeBase64String = null;
         try {
             MessageDigest md = MessageDigest.getInstance("SHA1");
             md.update(bytes);
             byte[] _bytes = md.digest();
             encodeBase64String = Base64.encodeBase64String(_bytes);
         } catch (NoSuchAlgorithmException ex) {
             ex.printStackTrace();
         }
         return encodeBase64String;
     }