code: public static String convertToBoolStr(final String first) {
      final StringBuilder occupyBuffer = new StringBuilder(first.length());
      for (int i = 0; i < first.length(); i++) {
        if ('0' == first.charAt(i)) {
          occupyBuffer.append('0');
        } else {
          occupyBuffer.append('1');
        }
  
      }
      return occupyBuffer.toString();
    }
docs: 将"314213421340asdf"转换成"1111111111101111"
  
  @param first a {@link java.lang.String} object.
  @return a {@link java.lang.String} object.