code: private SheetTemplate exportExcelByMapHandler(List<MapSheetWrapper> sheetWrappers,
                                                    String templatePath)
              throws Excel4JException {
  
          // 加载模板
          SheetTemplate template = SheetTemplateHandler.sheetTemplateBuilder(templatePath);
  
          // 多sheet生成
          for (MapSheetWrapper sheet : sheetWrappers) {
              generateSheet(template,
                      sheet.getSheetIndex(),
                      sheet.getData(),
                      sheet.getExtendMap(),
                      sheet.getClazz(),
                      sheet.isWriteHeader()
              );
          }
  
          return template;
      }
docs: 多sheet导出