元服务——5、接口解析

一、创建新项目

选择Application

点击finish

网络图片加载，Image('链接').属性

二、安装axios库

点击Terminal,

输入ohpm install @ohos/axios回车， 导包import axios, { AxiosResponse } from '@ohos/axios';

如果报错，手动加载库

Build -> Clean Project

File -> Sync and Refresh Project

三、配置设置

对http的请求概述： 应用通过HTTP发起一个数据请求，支持常见的GET、POST、OPTIONS、HEAD、PUT、DELETE、TRACE、CONNECT方法。 HTTP数据请求功能主要由http模块提供。 使用该功能需要申请ohos.permission.INTERNET权限。 配置文件：

entry\src\main\module.json5

增加配置

,
"requestPermissions": [
  {
    "name": "ohos.permission.INTERNET"
  }
]

四、model模型创建

创建model文件夹

model下建接口 示例返回数据

有几层就要创建几层model的ets文件，我们在其中看到address又是一个对象，所以得单独创建一个Address.ets的文件。

代码

import { Address } from "../model/Address";

export interface Users{
  id:number;
  name:string;
  age:number;
  email:string;
  address:Address;
  phone_number:string;
}

/*
 * 用于承接返回数据
 * */
export interface ApiResult<T> {
  code:number;
  msg:string;
  date:T
}

import { Address } from "../model/Address";

export interface Users{
  id:number;
  name:string;
  age:number;
  email:string;
  address:Address;
  phone_numbers:string;
}

五、GET请求示例

pages文件夹下新建ShowUsers (ArkTS File文件)，点检previewer预览

/*
 * 引包操作
 * */
import axios, { AxiosResponse } from '@ohos/axios';
import { Users } from '../model/Users';
import { BusinessError } from '@kit.BasicServicesKit';
import { JSON } from '@kit.ArkTS';
import { ApiResult } from '../model/ApiRest';

@Entry
@Component
struct GetDemo{
  /*
   * 返回数据
   * */
  @State info:Users[]|null=null;

  /*
   * 构建页面，单独存在的，里面无法放函数
   * */
  build() {
    Column() {
      Column() {
        Text() {
          Span("用 户 信 息")
        }.fontSize(36)
        .width('100%')
        .margin({ top: '15%', left: '50%' })
      }
      Text().borderStyle(BorderStyle.Solid).borderWidth(1).width('100%')
      List() {
        ForEach(this.info, (u: Users, index) => {
          ListItem() {
            Column() {
              Row() {
                Text("编号：").fontSize(22)
                Text(u.id.toString()).fontSize(22)
              }.width('100%')
              Row() {
                Text("姓名：").fontSize(22)
                Text(u.name.toString()).fontSize(22)
              }.width('100%')
              Row() {
                Text("年龄：").fontSize(22)
                Text(u.age.toString()).fontSize(22)
              }.width('100%')
              Row() {
                Text("手机号：").fontSize(22)
                Text(u.phone_numbers.toString()).fontSize(22)
              }.width('100%')
              Row() {
                Text("邮箱：").fontSize(22)
                Text(u.email.toString()).fontSize(22)
              }.width('100%')
              Row() {
                Text("地址：").fontSize(22)
                Text(){
                  Span(u.address.city.toString())
                  Span(u.address.country.toString())
                  Span(u.address.street.toString())
                }.fontSize(22)
              }.width('100%')
              Text().borderStyle(BorderStyle.Solid).borderWidth(1).width('100%')
            }.width('100%')
            .justifyContent(FlexAlign.Start)

          }
        })
      }
      .listDirection(Axis.Vertical)
    }
  }
  /*初始化的时候加载的函数*/
  aboutToAppear(): void {
    this.queryUsers();
  }
  /**
   * GET请求函数
   * 异步加载get请求
   */
  async queryUsers() {
    try {
      const url = "http://39.107.126.100:5000/getInfo";
      // 返回数据类型
      const result: AxiosResponse<Users[]> =
        await axios.get<ApiResult<Users[]>, AxiosResponse<Users[]>, null>(url);
      this.info=result.data;
    } catch (error) {
      const err = error as BusinessError;
    }
  }
}

效果

六、POST请求示例

POST接口连接：https://openatom.atomgit.com/api/developer/recommend_list

模型层

ApiResult

export interface ApiResult<T> {
  code: number;
  msg: string;
  data: T;
}

WareHouseList

export interface WareHouseList{
  jump:string;
  warehouseName:string;
}

Recommend

import { WareHouseList } from "./WareHouseList";

export interface Recommend{
  nickname:string;
  photo:string;
  userId:string;
  username:string;
  profile:string;
  jump:string;
  isFocus:string;
  focusButtonDisabled:string;
  warehouseList:WareHouseList[];
}

Developer

import { Recommend } from "./Recommend"
export interface Developer{
  records: Recommend[];
  total:number;
  size:number;
  current:number;
  pages:string;
}

引包操作

import axios, { AxiosResponse } from '@ohos/axios';
import { BusinessError } from '@kit.BasicServicesKit';
import { Developer } from '../model/Developer';
import { Recommend } from '../model/Recommend';

返回数据

@State info: Developer | null = null;

遍历展示数据

import axios, { AxiosResponse } from '@ohos/axios';
import { BusinessError } from '@kit.BasicServicesKit';
import { Developer } from '../model/Developer';
import { Recommend } from '../model/Recommend';

PersistentStorage.persistProp<string>("token", "");

@Entry
@Component
struct ShowIndex {
  scroller: Scroller = new Scroller();
  @State url: string = "https://openatom.atomgit.com/api/developer/recommend_list";
  @State info: Developer | null = null;

  build() {
    Scroll(this.scroller) {
      Column(){
        ForEach(this.info?.records,(rec:Recommend,index)=>{
          Column(){
            Text(rec.nickname)
            Image(rec.photo).width(50)
            Text(rec.userId)
            Text(rec.username)
            Text(rec.jump)
          }
        })
      }.width('100%')
    }
  }
  aboutToAppear(): void {
    this.getOrgList();
  }
  async getOrgList() {
    interface RequestParam {
      pageSize: number;
      pageNum: number;
      isSelected: number;
    }
    const param: RequestParam = {
      pageSize: 10,
      pageNum: 1,
      isSelected: 0
    };
    axios.post(this.url, param, {
      headers: {
        "X-ATOMGIT-POP-COMMUNITY": "openatom"
      }
    }).then((ret: AxiosResponse) => {
      this.info=ret.data["data"];
      console.log(`请求结果：${JSON.stringify(ret.data["data"])}`);
    }).catch((error: BusinessError) => {
      console.error(`请求异常：${JSON.stringify(error)}`);
    })
  }
}