routing – Angular 2错误：无法解析’RouteParams’的所有参数

Cannot resolve all parameters for ‘RouteParams'(?). Make sure that all
the parameters are decorated with Inject or have valid type
annotations and that ‘RouteParams’ is decorated with Injectable.
angular2-polyfills.js:332 Error: Cannot read property ‘getOptional’ of
undefined…….

看看这个Plnkr.如何在不收到此警告的情况下使用RouteParams？

重要文件是：

boot.ts：

import {bootstrap} from 'angular2/platform/browser';
import {ROUTER_PROVIDERS,RouteParams} from 'angular2/router';
import {AppComponent} from './app/app.component';

bootstrap(AppComponent,[ROUTER_PROVIDERS,RouteParams]);

和app.component.ts：

import {Component,OnInit} from 'angular2/core';
import {RouteParams} from "angular2/router";

@Component({
  selector: 'app',template: `
    <p *ngIf="guid">guid gived is: {{guid}}</p>
    <p *ngIf="!guid">No guid given in query-string in URL</p>
  `
})
export class AppComponent implements OnInit {
  guid:string;

  constructor(private _params: RouteParams) {} //

  ngOnInit() {
    this.guid = this._params.get('guid');
  }

}

更新：

我没有任何路由,我只有默认的根路由(如果我没有其他路由,那么可以称之为路由……).但正如Gianluca建议的那样,我添加了以下路由配置：

@RouteConfig([
  { path: '/:guid',name: 'Home',component: AppComponent,useAsDefault: true },])

但我仍然得到同样的错误(Plnkr更新)…