如何在Angular中重新加载可观察到的http？

import { HttpClient } from '@angular/common/http';

constructor(private http: HttpClient) { }

getData(): Observable<any> {
  return this.http.get<any>('https://api.example.com/data');
}

reloadData() {
  this.getData().subscribe(
    data => {
      // 处理数据
    },
    error => {
      // 处理错误
    }
  );
}

<button (click)="reloadData()">重新加载数据</button>