easypoi生成Excel下拉框选项

/*** excel 导出* @param list* @param pojoClass* @param fileName* @param response* @param exportParams* @param selectList* @throws IOException*/private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams,List<String> selectList) throws IOException {Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);selectList(workbook, 0, 0, new String[]{"北京","上海","天津","广州","深圳"});downLoadExcel(fileName, response, workbook);}/*** 下载** @param fileName 文件名称* @param response* @param workbook excel数据*/private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) throws IOException {try {response.setCharacterEncoding("UTF-8");response.setHeader("Access-Control-Expose-Headers","Content-Disposition");response.setHeader("content-Type", "application/vnd.ms-excel");response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + "." + ExcelTypeEnum.XLSX.getValue(), "UTF-8"));workbook.write(response.getOutputStream());} catch (Exception e) {throw new IOException(e.getMessage());}}/*** 生成下拉列表* * @param workbook* @param firstCol* @param lastCol* @param datas*/public static void selectList(Workbook workbook,int firstCol,int lastCol,String[] datas ){Sheet sheet = workbook.getSheetAt(0);//生成下拉列表CellRangeAddressList cellRangeAddressList = new CellRangeAddressList(2, 90000, firstCol, lastCol);//生成下拉框内容DataValidationHelper dvHelper = sheet.getDataValidationHelper();DataValidationConstraint dvConstraint = dvHelper.createExplicitListConstraint(datas);DataValidation validation = dvHelper.createValidation(dvConstraint, cellRangeAddressList);//设置错误信息提示validation.setShowErrorBox(true);//对sheet页生效sheet.addValidationData(validation);}