如何使用Dio包在Flutter中以表单形式发送数组？

import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';

void sendFormDataWithArray() async {
  // 创建Dio实例
  Dio dio = Dio();

  // 设置请求的URL
  String url = "https://example.com/api/endpoint";

  // 创建一个FormData对象，并添加表单字段和数组
  FormData formData = FormData.fromMap({
    'field1': 'value1',
    'field2': 'value2',
    'arrayField': ['element1', 'element2', 'element3']
  });

  try {
    // 发送POST请求，并传递FormData对象
    Response response = await dio.post(url, data: formData);
    
    // 处理响应结果
    debugPrint("Response status: ${response.statusCode}");
    debugPrint("Response data: ${response.data}");
  } catch (error) {
    // 处理请求错误
    debugPrint("Error: $error");
  }
}

sendFormDataWithArray();