Flutter Dio二次封装

data: EntityFactory.generateOBJ(json[“data”]),
);
}
}

BaseListEntity：

class BaseListEntity {
int code;
String message;
List data;

BaseListEntity({this.code, this.message, this.data});

factory BaseListEntity.fromJson(json) {
List mData = List();
if (json[‘data’] != null) {
//遍历data并转换为我们传进来的类型
(json[‘data’] as List).forEach((v) {
mData.add(EntityFactory.generateOBJ(v));
});
}

return BaseListEntity(
code: json[“code”],
message: json[“msg”],
data: mData,
);

} }

ErrorEntity：

class ErrorEntity {
int code;
String message;
ErrorEntity({this.code, this.message});
}

NWApi：

class NWApi {
static final baseApi = “https://easy-mock.bookset.io/mock/5dfae67d4946c20a50841fa7/example/”;
static final loginPath = “user/login”;//接口返回：{“code”: int, “message”: “String”, “data”: {“account”: “String”, “password”: “String”}}
static final queryListPath = “/query/list”;//接口返回：{“code”: ing, “message”: “String”, “data”: [int, int, String, int, String, int]}
static final queryListJsonPath = “/query/listjson”;//接口返回：{“code”: int, “message”: “String”, “data”: [{“account”: “String”, “password”: “String”}， {“account”: “String”, “password”: “String”}]}
}

NWMethod：

enum NWMethod {
GET,
POST,
DELETE,
PUT
}
//使用：NWMethodValues[NWMethod.POST]
const NWMethodValues = {
NWMethod.GET: “get”,
NWMethod.POST: “post”,
NWMethod.DELETE: “delete”,
NWMethod.PUT: “put”
};

下面就可以进行正式的封装了：

第一步是创建Dio的单例辅助类，并初始化Dio和对Dio进行一些全局的参数设置：

import ‘package:dio/dio.dart’;
import ‘package:flutter_app/network/NWApi.dart’;
import ‘package:flutter_app/utils/PrintUtil.dart’;
class DioManager {
static final DioManager _shared = DioManager._internal();
factory DioManager() => _shared;
Dio dio;
DioManager._internal() {
if (dio == null) {
BaseOptions options = BaseOptions(
baseUrl: NWApi.baseApi,
contentType: Headers.jsonContentType,
responseType: ResponseType.json,
receiveDataWhenStatusError: false,
connectTimeout: 30000,
receiveTimeout: 3000,
);
dio = Dio(options);
}
}
}

第二步对请求进行封装，在我的想法中 {“code”: 0, “message”: “”, “data”: {}} 和 {“code”: 0, “