code: private SheetTemplate exportExcelByModuleHandler(String templatePath,
                                                       int sheetIndex,
                                                       List<?> data,
                                                       Map<String, String> extendMap,
                                                       Class clazz,
                                                       boolean isWriteHeader)
              throws Excel4JException {
  
          SheetTemplate template = SheetTemplateHandler.sheetTemplateBuilder(templatePath);
          generateSheet(sheetIndex, data, extendMap, clazz, isWriteHeader, template);
          return template;
      }
docs: 单sheet导出