1 接上一节，还记得有个

{path: 'newscontent/:id', component: NewscontentComponent},
那么，newscontent组件如何获取路由传递过来的id呢，上代码(newscontent.component.ts)：

import { Component, OnInit } from '@angular/core';
import {Router,ActivatedRoute,NavigationExtras} from '@angular/router';
@Component({
  selector: 'app-newscontent',
  templateUrl: './newscontent.component.html',
  styleUrls: ['./newscontent.component.css']
})
export class NewscontentComponent implements OnInit {

  constructor(private route:ActivatedRoute,private router:Router) { }

  ngOnInit() {
    //获取总路由传过来的id值
    console.log(this.route.params);

  }

  goNews(){
    // 不带参数从newscontent组件跳转到news组件
    this.router.navigate(['/news']);
  }

  goNewsWithParam()
  {
    //get传参
    let navigationExtras:NavigationExtras = {
      queryParams:{
        'sid':'123'
      },
      fragment:'anchor'
    };

    this.router.navigate(['/news'],navigationExtras);
    }


}

2 带参数从newscontent组件跳转到news组件后，news组件怎么接收参数呢，上代码news.component.ts:

import { Component, OnInit } from '@angular/core';
import {ActivatedRoute} from '@angular/router';

@Component({
  selector: 'app-news',
  templateUrl: './news.component.html',
  styleUrls: ['./news.component.css']
})
export class NewsComponent implements OnInit {


  constructor(private route: ActivatedRoute) {
    console.log(this.route.queryParams);
    }
  ngOnInit() {
  }

}

3 总结：ActivatedRoute组件用来接收参数，Router组件用来跳转