如何使用angular检索其路径存储在数据库中的图像？

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

@Injectable({
  providedIn: 'root'
})
export class ImageService {
  private apiUrl = 'http://your-backend-api-url/images'; // 替换为你的后端API地址

  constructor(private http: HttpClient) { }

  getImagePath(imageId: number): Observable<string> {
    const url = `${this.apiUrl}/${imageId}`;
    return this.http.get<string>(url);
  }
}

import { Component, OnInit } from '@angular/core';
import { ImageService } from './image.service';

@Component({
  selector: 'app-image',
  templateUrl: './image.component.html',
  styleUrls: ['./image.component.css']
})
export class ImageComponent implements OnInit {
  imagePath: string;

  constructor(private imageService: ImageService) { }

  ngOnInit(): void {
    const imageId = 1; // 替换为你要检索的图像ID
    this.imageService.getImagePath(imageId).subscribe(
      (path: string) => {
        this.imagePath = path;
      },
      (error) => {
        console.error('Failed to retrieve image path:', error);
      }
    );
  }
}

<img [src]="imagePath" alt="Image">