code: public void simpleSheet2Excel(List<SimpleSheetWrapper> sheets, boolean isXSSF, OutputStream os)
              throws IOException {
  
          try (Workbook workbook = exportExcelBySimpleHandler(sheets, isXSSF)) {
              workbook.write(os);
          }
      }
docs: 无模板、无注解、多sheet数据
  
  @param sheets 待导出sheet数据
  @param isXSSF 导出的Excel是否为Excel2007及以上版本(默认是)
  @param os     生成的Excel待输出数据流
  @throws IOException 异常