一个系统，涉及导出功能的需求是非常多的，需要设计一个工具类，提供给常规导出功能所需，减少代码量。展示相关的excel工具类

 举个实例：

controller层

@RestController
@Slf4j
public class PpmExportDataController {@AutowiredIPpmExportDataService ppmExportDataService;@PostMapping("/MpowerPPMService/getExcelData")public void getExcelData(@RequestBody MpowerPpmQueryParam queryParam,HttpServletResponse response) {ExcelSheet<Object> excelSheet = ppmExportDataService.getExcelData(queryParam);File file = new File(excelSheet.getSheetName());// 设置响应的头和客户端保存的文件名response.setCharacterEncoding("UTF-8");response.setContentType("application/octet-stream");response.setHeader("Content-Disposition", "attachment;fileName=" + file.getName());try (