是证书问题导致，下面是强制认证

import 'package:dio/dio.dart';

import 'package:dio/adapter.dart'; // 导入这个包，添加DefaultHttpClientAdapter

Response response;

    Dio dio = Dio();

    (dio.httpClientAdapter as DefaultHttpClientAdapter).onHttpClientCreate = (client) {

      client.badCertificateCallback = (cert, host, port) {

        return true; // 返回true强制通过

      };

    };

    try {

      response = await dio.get(

        url,

        options: Options(

          headers: {},

        ),

      );

    } catch (e) {

      print('错误');

      print(e);

    }