在組件 service.ts url: "http://localhost:4200/data/products.json" not found

我在這行代碼“return this.http.get('../data/products.json');”中收到 404 not found 錯誤

其中 service.ts 文件的路徑是“src\app\shared\services\product.service.ts”。json文件的路徑是“src\data\products.json”

這是 service.ts 代碼：

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

export interface Product {
  id: number;
  title: string;
  price: number;
  imageUrl: string;
  description: string;
}

@Injectable()
export class ProductService {
  constructor(private http: HttpClient) {}

  getAll(): Observable<Product[]> {
    return this.http.get<Product[]>('../data/products.json');
  }

  getById(productId: number): Observable<Product> {
    return this.http.get<Product[]>('../data/products.json')
      .pipe(
        map(products => <Product>products.find(p => p.id === productId))
      );
  }
}