如何在Angular 2中将数据作为Promise类型返回？

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

@Injectable()
export class DataService {
  getData(): Promise<any> {
    return new Promise((resolve, reject) => {
      // 模拟异步操作，比如从服务器获取数据
      setTimeout(() => {
        const data = '这是从服务器获取的数据';
        resolve(data); // 返回数据
      }, 2000);
    });
  }
}

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

@Component({
  selector: 'app-root',
  template: `
    <div>{{ data }}</div>
  `
})
export class AppComponent {
  data: any;

  constructor(private dataService: DataService) {}

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