小编Ana*_*nas的帖子

您好，我需要帮助，我创建了一个角度服务，但是当我想查看 json 文件中的数据时，它向我显示了这个错误，我尝试了很多不成功的解决方案

应用程序组件.ts

    import {Component, OnInit} from '@angular/core';
    import {Car} from './domain/car';
    import {CarService} from './service/carservice';

    @Component({
      selector: 'app-root',
      templateUrl: './app.component.html',
      styleUrls: ['./app.component.css'],
      providers: [CarService]
    })
    export class AppComponent implements OnInit {
      cars1: Car[];
      constructor(private carService: CarService) { }

      ngOnInit() {
       this.carService.getCarsSmall().subscribe(cars => this.cars1 = cars);
      }
    }

汽车服务.ts

@Injectable()
export class CarService {

  private jsonUrl = './cars-smalll.json';

  constructor(private http: Http) {}
    getCarsSmall(): Observable<Car[]> {
      return this.http.get(this.jsonUrl)
        .map(this.extractData)
        .catch(this.handleError);
    }

    private extractData(res: Response) {
      let body = res.json();
      return …