angular 路由传参

第一种：
<a [routerLink]="['/product']" [queryParams]="{id: 1}">商品详情</a>

第一种接收参数：

export class ProductComponent implements OnInit { 

　　private productId: number; 
　　constructor(private routeInfo: ActivatedRoute) {
　　 } 
　　ngOnInit() { 
　　　　this.productId = this.routeInfo.snapshot.queryParams["id"]; 
　　} 
} 

<p> product works! </p> 
商品Id{{productId}}

第二种：
const routes: Routes = [
  {
    path:'',
    component: HomeComponent
  },
  {
    path: 'product/:id',
    component: ProductComponent
  }
  ,
  {
    path: '**',
    component: Code404Component
  }
];
<a [routerLink]="['/product',1]">商品详情</a>

第二种接收参数：
export class ProductComponent implements OnInit {

  private productId: number;

  constructor(private routeInfo: ActivatedRoute) { }

  ngOnInit() {
    this.productId = this.routeInfo.snapshot.params["id"];
  }

}

参数订阅：

  ngOnInit() {
    this.routeInfo.params.subscribe((params: Params)=> this.productId=params["id"]);
    //this.productId = this.routeInfo.snapshot.params["id"];
  }

参数快照：

  ngOnInit() {
    //this.routeInfo.params.subscribe((params: Params)=> this.productId=params["id"]);
    this.productId = this.routeInfo.snapshot.params["id"];
  }