angular-docs-cn/public/docs/_examples/router/ts/app/admin/admin-dashboard.component.2.ts

// #docregion
import { Component, OnInit }  from '@angular/core';
import { ActivatedRoute }     from '@angular/router';
import { Observable }         from 'rxjs/Observable';
import 'rxjs/add/operator/map';

@Component({
  template:  `
    <p>Dashboard</p>

    <p>Session ID: {{ sessionId | async }}</p>
    <a id="anchor"></a>
    <p>Token: {{ token | async }}</p>
  `
})
export class AdminDashboardComponent implements OnInit {
  sessionId: Observable<string>;
  token: Observable<string>;

  constructor(private route: ActivatedRoute) {}

  ngOnInit() {
    // Capture the session ID if available
    this.sessionId = this.route
      .queryParams
      .map(params => params['session_id'] || 'None');

    // Capture the fragment if available
    this.token = this.route
      .fragment
      .map(fragment => fragment || 'None');
  }
}