angularjs请求数据的方法示例

在 app.module.ts 中引入 HttpClientModule 并注入

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

Angular get 请求数据

在用到的地方引入 HttpClient 并在构造函数声明

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

get 请求数据

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

Angular post 提交数据

在用到的地方引入 HttpClient、HttpHeaders 并在构造函数声明 HttpClient

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

post 提交数据

const httpOptions = {
 headers: new HttpHeaders({ 'Content-Type': 'application/json' })
};
var api = "http://127.0.0.1:3000/doLogin";
this.http.post(api,{username:'张三',age:'20'},httpOptions).subscribe(response => {
 console.log(response);
});

Angular Jsonp 请求数据

在 app.module.ts 中引入 HttpClientModule、HttpClientJsonpModule 并注入

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

在用到的地方引入 HttpClient 并在构造函数声明

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

jsonp 请求数据

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

Angular 中使用第三方模块 axios 请求数据

安装 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
});

封装service作为http服务

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)
     });
  })

 } 
}

总结

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