Flutter Dio联网封装成NetUtils

class Api{

 flutter-go.alibaba.net/';
  static const String DO_LOGIN = BASE_URL+'doLogin';//登陆
}

import 'dart:async';
import 'dart:io';
import 'package:dio/dio.dart';

Map<String,dynamic> optHeader = {
  'accept-language':'zh-cn',
  'content-type':'application/json'
};

var dio = new Dio(BaseOptions(connectTimeout: 30000,headers: optHeader));

class NetUtils {

  static Future get(String url, [Map<String, dynamic> params]) async {
    var response;

    if (params != null) {
      response = await dio.get(url, queryParameters: params);
    } else {
      response = await dio.get(url);
    }
    return response.data;
  }

  static Future post(String url, Map<String, dynamic> params) async {
    var response = await dio.post(url, data: params);
    return response.data;
  }
}

class DataUtils {
  static Future<UserInfo> doLogin(Map<String, String> params) async {
    var response = await NetUtils.post(Api.DO_LOGIN, params);
    UserInfo userInfo = UserInfo.fromJson(response['data']);
    return userInfo;
  }
}

DataUtils.doLogin({'username': username, 'password': password})
       .then((result) {}).catchError((onError) {
     print(onError);
   });