Include

import {Component} from "@angular/core";
import {Inject} from "@angular/core";
import {Injectable} from "@angular/core";
import {OnInit} from "@angular/core";
import {Router} from "@angular/router";
import {Http, HTTP_PROVIDERS, URLSearchParams} from "@angular/http";
import {NotificationService} from "./notification.service";

@Component({
    selector: "login",
    templateUrl: "./html/login.component.html",
    providers: [HTTP_PROVIDERS, NotificationService],
})

export class LoginComponent {

    constructor(private _notificationService: NotificationService, public http: Http, public router: Router) {
    }

....
}