http://localhost:4200/assets/product.json 404 (Not Found)

I am trying to read a json file data through a service.I have created the file in the assets folder named product.json. But on running the code it returns "http://localhost:4200/assets/product.json 404 (Not Found)" in the console.

here is my service file code:

import { Injectable } from '@angular/core';
import { Http,Response,Headers,RequestOptions } from '@angular/http';
import 'rxjs/Rx';

@Injectable()
export class ProductDataService {
headers:Headers;
options:RequestOptions;
//url:string="/localservice/product.json";
url:string = "assets/product.json"
constructor(private _http:Http) {
this.headers = new Headers({'Content-type':'application/json','Accept':'q=0.8;application/json;q=0.9'});
this.options =new RequestOptions({headers:this.headers})
}


getAllProduct(){
return this._http.get('../assets/product.json',this.options)
.map((res:Response)=>res.json());
}
}


I have tried using "assets/product.json","../assets/product.json" as path

porduct.component.ts:

export class ProductComponent {

allProductroduct[]=[];
constructor(private _dataroductDataService) { }
ngOnInit() {
/* this._data.getAllProduct().subscribe(
(dataroduct[])=>{
this.allProduct=data;
}
); */
}
onClick(value:string){
if(value!=''){
this.allProduct=this.allProduct.filter(res=>res.pname.startsWith(value));
}
else{
this._data.getAllProduct().subscribe(
(dataroduct[])=>{
this.allProduct=data;
}
);
}
}

}


angular-cli.json:

{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"project": {
"name": "new-app"
},
"apps": [
{
"root": "src",
"outDir": "dist",
"assets": [
"assets",
"favicon.ico"
],
"index": "index.html",
"main": "main.ts",
"polyfills": "polyfills.ts",
"test": "test.ts",
"tsconfig": "tsconfig.app.json",
"testTsconfig": "tsconfig.spec.json",
"prefix": "app",
"styles": [
"styles.css"
],
"scripts": [],
"environmentSource": "environments/environment.ts",
"environments": {
"dev": "environments/environment.ts",
"prod": "environments/environment.prod.ts"
}
}
],
"e2e": {
"protractor": {
"config": "./protractor.conf.js"
}
},
"lint": [
{
"project": "src/tsconfig.app.json",
"exclude": "**/node_modules/**"
},
{
"project": "src/tsconfig.spec.json",
"exclude": "**/node_modules/**"
},
{
"project": "e2e/tsconfig.e2e.json",
"exclude": "**/node_modules/**"
}
],
"test": {
"karma": {
"config": "./karma.conf.js"
}
},
"defaults": {
"styleExt": "css",
"component": {}
}
}


please tell me where is the problem.Thanks in advance

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