angular4-http

导入 Http 模块

import { HttpModule } from '@angular/http';

@NgModule({
  imports: [BrowserModule, FormsModule, HttpModule],
  declarations: [AppComponent, UserComponent],
  bootstrap: [AppComponent]
})
export class AppModule { }

import { Component, OnInit } from '@angular/core';
import { Http } from '@angular/http'; // (1)
import 'rxjs/add/operator/map'; // (2)

interface Member {
    id: string;
    login: string;
    avatar_url: string;
}

@Component({
    selector: 'sl-members',
    template: `
    <h3>Angular Orgs Members</h3>
    <ul *ngIf="members">
      <li *ngFor="let member of members;">
        <p>
          <img [src]="member.avatar_url" width="48" height="48"/>
          ID：<span>{{member.id}}</span>
          Name: <span>{{member.login}}</span>
        </p>
      </li>
    </ul>
    `
})
export class MembersComponent implements OnInit {
  members: Member[];

  constructor(private http: Http) { } // (3)使用 DI 方式注入 http 服务

  ngOnInit() {
    this.http.get(`https://api.github.com/orgs/angular/members?page=1&per_page=5`) // (4)调用 http 服务的 get() 方法，设置请求地址并发送 HTTP 请求
        .map(res => res.json()) // (5)调用 Response 对象的 json() 方法，把响应体转成 JSON 对象
        .subscribe(data => {
           if (data) this.members = data; // (6)把请求的结果，赋值给对应的属性
        });
    }
}

声明 MembersComponent 组件

import { MembersComponent } from './members.component';

@NgModule({
  imports: [BrowserModule, FormsModule, HttpModule],
  declarations: [AppComponent, UserComponent, MembersComponent],
  bootstrap: [AppComponent]
})
export class AppModule { }

使用 MembersComponent 组件

import { Component } from '@angular/core';

@Component({
  selector: 'my-app',
  template: `
    <sl-members></sl-members>
  `,
})
export class AppComponent {}