Angular数据请求，get,post

一、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 url= "http://127.0.0.1:8080/api/productlist";
this.http.get(url).subscribe (response =>{
    console.log(response);
})

二、Angular post提交数据

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注入

import {HttpClientModule} from '@angular/common/http'

imports:[
    BrowserModule,
    HttpClientModule
]

2、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) {}

3, post提交数据

var url="http://127.0.0.1:8080/doLogin";

this.http.post(url, {"age":22,"username":"zl"})
  .subscribe((response)=>{
    console.log(response)
  })

三、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";

3, post提交数据

var url="http://127.0.0.1:8080/doLogin";

this.http.jsonp(url,"callback").subscribe((response:any)=>{
  this.userList=response;
  console.log(response)
})

四、Angular中使用第三方模块axios请求数据

1、安装axios

cnpm install axios --save

2、用到的地方引入axios

import axios from 'axios";

3,get请求

var url= "http://127.0.0.1:8080/api/productlist";
axios.get(url)
    .then(function (response){
      console.log(response)
　　)}

五，在服务（service）中通过Promise封装请求

get(api){
    return new Promise((resolve, reject)=>{
         this.http.get(api).subscribe( (response)=>{
             resolve(response);
        })   
    })
}

在用到的组件中引入服务，然后调用方法

import { CommonService } from '../../services/common.service';

constructor(public common:CommonService) { }


this.common.get(api).then((response)->{
     console. log (response);
   })