如何从父组件获取RouteParams?
App.ts:
@Component({
  ...
})
@RouteConfig([
  {path: '/', component: HomeComponent, as: 'Home'},
  {path: '/:username/...', component: ParentComponent, as: 'Parent'}
])
export class HomeComponent {
  ...
}
然后,在中ParentComponent,我可以轻松获取用户名参数并设置子路由.
Parent.ts:
@Component({
  ...
})
@RouteConfig([
  { path: '/child-1', component: ChildOneComponent, as: 'ChildOne' },
  { path: '/child-2', component: ChildTwoComponent, as: 'ChildTwo' }
])
export class ParentComponent {
  public username: string;
  constructor(
    public params: RouteParams
  ) {
    this.username = params.get('username');
  }
  ...
}
但是,如何在这些子组件中获得相同的"用户名"参数?做与上面相同的技巧,不会这样做.因为这些参数是在ProfileComponent中定义的还是什么?
@Component({
  ...
})
export class ChildOneComponent {
  public …展望设置使用的一个网站谷歌的推荐的多区域和多语言网站的做法,利用子目录与gTLD的(例如特别的模型.www.stackoverflow.com/en/questions/ask,www.stackoverflow.com/fr/questions/ask等).
根据顶级子目录,我想设置默认语言并获取相应的JSON数据.进一步解释,当用户直接导航到www.mywebsite.com/en/home时,默认语言将被设置为en,我的内容服务将获取该en.json文件.  
在上面的示例中,我的路由将配置如下:
export const routes: RouterConfig = [
  { path: ':country',          component: Home },
  { path: ':country/home',     component: Home },
  { path: ':country/about',    component: About },
  { path: ':country/contact',  component: Contact }
];
我试图找出如何抓住:country路线参数(如果网址是www.mywebsite.com/en/about/我试图让:country路由参数值en)的时候Home,About或Contact组件.这是我尝试过的几件事:  
export class Home implements OnInit {
    constructor(
        private route: ActivatedRoute
    ) {}
    private sub: any;
    ngOnInit(){
       this.sub = this.route.params.subscribe(params => {
         let country …