code: public static String ascii(String code, int key) {
          StringBuilder string = new StringBuilder();
          int[] keys = CryptUtils.getKeys(key);
          for (int i = 0; i < code.length(); i++) {
              string.append((char) (code.charAt(i) - (i + keys[0]) % keys[1] % keys[2]));
          }
          return string.toString();
      }
docs: ascii解密
  
  @param code {@link String}
  @param key {@link Integer}
  
  @return {@link String}