仅为Angular中的特定组件调用后端

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

@Injectable({
  providedIn: 'root'
})
export class UserService {
  private apiUrl = 'https://api.example.com/users';

  constructor(private http: HttpClient) {}

  getUserProfile(userId: string): Observable<any> {
    return this.http.get(`${this.apiUrl}/${userId}`);
  }
}

import { Component, OnInit } from '@angular/core';
import { UserService } from './user.service';

@Component({
  selector: 'app-user-profile',
  templateUrl: './user-profile.component.html',
  styleUrls: ['./user-profile.component.css']
})
export class UserProfileComponent implements OnInit {
  userProfile: any;

  constructor(private userService: UserService) {}

  ngOnInit(): void {
    const userId = '123'; // 假设这是当前用户的ID
    this.userService.getUserProfile(userId).subscribe(data => {
      this.userProfile = data;
    }, error => {
      console.error('Error fetching user profile', error);
    });
  }
}