code: public static String exportToHtml(Option option, String folderPath) {
          String fileName = "ECharts-" + System.currentTimeMillis() + ".html";
          return exportToHtml(option, folderPath, fileName);
      }
docs: 导出到指定文件夹，文件名随机
  
  @param option
  @param folderPath
  @return 返回html路径