我必须以模式显示数据。为此，我使用Angular2服务和消费web服务，以显示从后端数据库。在……里面

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable()
export class DataService {
  constructor(private http: HttpClient) {}

  getData(): Observable<any> {
    return this.http.get('http://backend-api-url/data');
  }
}

import { Component, OnInit } from '@angular/core';
import { DataService } from './data.service';

@Component({
  selector: 'app-data',
  template: `
    <h1>Data from Backend</h1>
    <ul>
      <li *ngFor="let item of data">{{ item.name }}</li>
    </ul>
  `,
})
export class DataComponent implements OnInit {
  data: any[];

  constructor(private dataService: DataService) {}

  ngOnInit() {
    this.dataService.getData().subscribe((response) => {
      this.data = response;
    });
  }
}