Angular2在Http调用后从验证服务返回数据

import { Injectable } from '@angular/core';
import { Http } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/map';

@Injectable()
export class ValidationService {
  constructor(private http: Http) {}

  validateData(data: any): Observable<any> {
    return this.http.post('https://api.example.com/validate', data)
      .map(response => response.json());
  }
}

@Component({
  selector: 'app',
  template: `
    <button (click)="validate()">Validate Data</button>
  `
})
export class AppComponent {
  constructor(private validationService: ValidationService) {}

  validate() {
    const data = { /* 数据对象 */ };
    this.validationService.validateData(data)
      .subscribe(response => {
        // 处理验证服务返回的数据
        console.log(response);
      });
  }
}