在angular 6中使用HttpClient下载文件

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

constructor(private http: HttpClient) { }

downloadFile(url: string): void {
  this.http.get(url, { responseType: 'blob' }).subscribe((data: Blob) => {
    const downloadUrl = window.URL.createObjectURL(data);
    const link = document.createElement('a');
    link.href = downloadUrl;
    link.download = 'filename.ext'; // 设置下载的文件名
    link.click();
    window.URL.revokeObjectURL(downloadUrl);
  });
}

this.downloadFile('http://example.com/file.pdf');