如何使用Dio在Flutter中上传多个图像/文件？

dependencies:
  dio: ^4.0.0

import 'package:dio/dio.dart';

Dio dio = Dio();

FormData formData = FormData.fromMap({
  'file1': await MultipartFile.fromFile('/path/to/file1.jpg', filename: 'file1.jpg'),
  'file2': await MultipartFile.fromFile('/path/to/file2.jpg', filename: 'file2.jpg'),
});

Response response = await dio.post(
  'https://example.com/upload',
  data: formData,
);

import 'package:dio/dio.dart';

void uploadFiles() async {
  Dio dio = Dio();

  FormData formData = FormData.fromMap({
    'file1': await MultipartFile.fromFile('/path/to/file1.jpg', filename: 'file1.jpg'),
    'file2': await MultipartFile.fromFile('/path/to/file2.jpg', filename: 'file2.jpg'),
  });

  try {
    Response response = await dio.post(
      'https://example.com/upload',
      data: formData,
    );
    
    print(response.data);
  } catch (e) {
    print(e);
  }
}