如何在angular4中读取APP_INITIALIZER服务中的查询参数？

import { Injectable } from '@angular/core';
import { ActivatedRoute } from '@angular/router';

@Injectable()
export function appInitializer(route: ActivatedRoute) {
  return () => {
    route.queryParams.subscribe(params => {
      // 在这里处理查询参数
      console.log(params);
    });
  };
}

import { NgModule, APP_INITIALIZER } from '@angular/core';
import { appInitializer } from './app-initializer';

@NgModule({
  // ...
  providers: [
    {
      provide: APP_INITIALIZER,
      useFactory: appInitializer,
      multi: true,
      deps: [ActivatedRoute]
    }
  ],
  // ...
})
export class AppModule { }