Flutter web -如何将excel文件保存到设备

import 'package:excel/excel.dart';
import 'package:universal_html/html.dart' as html;

var excel = Excel.createExcel();
var sheet = excel['Sheet1'];
sheet.appendRow(['Name', 'Age']);
sheet.appendRow(['John', '25']);
sheet.appendRow(['Alice', '30']);

var excelData = excel.encode();
var blob = html.Blob([excelData], 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
var url = html.Url.createObjectUrlFromBlob(blob);
var anchor = html.document.createElement('a') as html.AnchorElement;
anchor.href = url;
anchor.download = 'data.xlsx';
anchor.click();
html.Url.revokeObjectUrl(url);