突然让我用

import {Injectable} from "@angular/core";import {ActivatedRoute} from "@angular/router";import {Subscription} from "rxjs/Rx";import {UserModel} from "./shared/user.model";@Injectable()export class UserService {  protected user: UserModel;  protected subscription: Subscription;  constructor(protected activatedRoute: ActivatedRoute) {    this.subscription = this.activatedRoute.queryParams.subscribe(      (queryParams: any) => {        if (queryParams.name) {          this.setUser(queryParams.name);        }      }    )  }  setUser(name) {    this.user = new UserModel(name);    console.log('Setting user', this.user);  }}