angularjs的請求數據的方式

在 app.module.ts 中引入 HttpClientModule 並注入

import {HttpClientModule} from '@angular/common/http';
imports: [
  BrowserModule,
  HttpClientModule
]

Angular get 請求數據
在用到的地方引入 HttpClient 並在構造函數聲明

import {HttpClient} from "@angular/common/http";
constructor(public http:HttpClient) { }

get 請求數據

var api = "http://a.itying.com/api/productlist";
this.http.get(api).subscribe(response => {
  console.log(response);
});

Angular post 提交數據
在用到的地方引入 HttpClient、HttpHeaders 並在構造函數聲明 HttpClient

import {HttpClient,HttpHeaders} from "@angular/common/http";
constructor(public http:HttpClient) { }

post 提交數據

const httpOptions = {
  headers: new HttpHeaders({ 'Content-Type': 'application/json' })
};
var api = "http://127.0.0.1:3000/doLogin";
this.http.post(api,{username:'張三',age:'20'},httpOptions).subscribe(response => {
  console.log(response);
});

Angular Jsonp 請求數據
在 app.module.ts 中引入 HttpClientModule、HttpClientJsonpModule 並注入

import {HttpClientModule,HttpClientJsonpModule} from
'@angular/common/http';
imports: [
  BrowserModule,
  HttpClientModule,
  HttpClientJsonpModule
]

在用到的地方引入 HttpClient 並在構造函數聲明

import {HttpClient} from "@angular/common/http";
constructor(public http:HttpClient) { }

jsonp 請求數據

var api = "http://a.itying.com/api/productlist";
this.http.jsonp(api,'callback').subscribe(response => {
console.log(response);
});

Angular 中使用第三方模塊 axios 請求數據
安裝 axios

cnpm install axios --save

用到的地方引入 axios

import axios from 'axios';
axios.get('/user?ID=12345')
.then(function (response) {
// handle success
console.log(response);
})
.catch(function (error) {
// handle error
console.log(error);
})
.then(function () {
// always executed
});

封裝service做爲http服務

import { Injectable } from '@angular/core';
import axios from 'axios';
@Injectable({
  providedIn: 'root'
})
export class HttpserviceService {
  constructor() { }
  axiosGet(api){
     return new Promise((resolve,reject)=>{
        axios.get(api)
          .then(function (response) {
            // handle success     
            resolve(response)
          });
    })

  }  
}