angular 数据请求

Angular get 请求数据

Angular5.x 以后 get、post 和和服务器交互使用的是 HttpClientModule 模块。

• 1、在 app.module.ts 中引入 HttpClientModule 并注入

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

• 2、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) { }

• 3、get 请求数据

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

• 4、POST提交

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

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

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

• 2、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) { }

• 3、jsonp 请求数据

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

使用axios

1、安装 axios

cnpm install axios --save

2、用到的地方引入 axios

import axios from 'axios';

3、看文档使用

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 
});