鸿蒙HarmonyOS之封装Http请求工具类

一、常量类 Constants.ets

//超时时间10秒
static readonly HTTP_READ_TIMEOUT: number = 10000;//请求成功返回码
static readonly HTTP_CODE_200: number = 200;//请求成功后data中的code值（根据实际情况定）
static readonly SERVER_CODE_SUCCESS: number = 0;

二、请求工具类HttpUtil.ets

import { http } from '@kit.NetworkKit';
import ResponseResult from '../bean/ResponseResult';
import Constants, { ContentType } from '../constants/Constants';//Get请求
export function httpRequestGet(url: string) {return httpRequest(url, http.RequestMethod.GET);
}//Post请求
export function httpRequestPost(url: string, requestData: Object) {return httpRequest(url, http.RequestMethod.POST, requestData);
}//处理请求参数和请求结果
function httpRequest(url: string, method: http.RequestMethod, params?: Object): Promise<ResponseResult> {let httpRequest = http.createHttp();let responseResult = httpRequest.request(url, {method: method,readTimeout: Constants.HTTP_READ_TIMEOUT,header: {'Content-Type': ContentType.JSON,},connectTimeout: Constants.HTTP_READ_TIMEOUT,extraData: params});let serverData = new ResponseResult();return responseResult.then((value: http.HttpResponse) => {let result = `${value.result}`;let resultJson: ResponseResult = JSON.parse(result);if (value.responseCode === Constants.HTTP_CODE_200) {if (resultJson.code === Constants.SERVER_CODE_SUCCESS) {serverData.value = resultJson.value;}serverData.code = resultJson.code;serverData.msg = resultJson.msg;} else {serverData.code = resultJson.code;serverData.msg = resultJson.msg;}return serverData;}).catch(() => {return serverData;});
}

三、使用示例

1、可新建一个ets文件存放请求对象RequestBean和请求接收ResponseBean等对象

//DataPage类
export class DataPage<T> {pageIndex: number = 1; //页码pageSize: number = 10; //页面大小pageTotal: number = 1; //总页数amount: number = 0; //记录总数data: T[] = []; //本页数据
}//请求Bean
export class ActivityRequest {token: string = "";clientType: string = "";page: number = 1;
}//请求接收Bean
export class ActivityResponse {id: number = 0;mainActivityId: number = 0;name: string = "";.......
}

2、编写请求方法，传入请求参数，设置Url，处理请求结果等

 RequestData(page: number): Promise<DataPage<ActivityResponse>> {return new Promise((resolve: Function) => {let url = '请求Url.....';let requestData: ActivityRequest = new ActivityRequest();requestData.clientType = 'HarmonyOS';PreferencesUtil.getLoginToken().then((value) => {requestData.token = value;requestData.page = page;Logger.debug(this.TAG,'请求Url：'+ url)Logger.debug(this.TAG,'请求参数信息：'+ JSON.stringify(requestData))//这里调用HttpUtil工具类里面的Post请求方法httpRequestPost(url, requestData).then((data: ResponseResult) => {if (data && data.code === Constants.SERVER_CODE_SUCCESS) {resolve(data.value);Logger.debug(this.TAG,'请求成功！')//可以在此处处理请求结果，也可以在步骤3所示请求回调中处理请求的结果} else {Logger.debug(this.TAG,'请求失败！' + data.code + ": " + data.msg)resolve(null);if (data.code === -1) {showToast('请求异常')}else {showToast(data.msg)}}}).catch(() => {Logger.error(this.TAG,'请求异常！')showToast('网络请求异常！')resolve(null);});});});}

3、调用，返回请求成功后的数据结果，可进行后续处理

this.RequestData(page).then((result: DataPage<ActivityResponse>) => {if (result){Logger.debug(this.TAG,'页码pageIndex：'+ result.pageIndex + ' 每页数量pageSize：'+ result.pageSize + ' 总页数pageTotal：'+ result.pageTotal + '记录总数amount:' + result.amount)if(result.amount > 0) {Logger.debug(this.TAG,'数据：'+ JSON.stringify(this.liveDataList))}else{Logger.debug(this.TAG,'数据为空')}}});

四、完成，Nice！