angular resolve路由

import { Resolve, ActivatedRouteSnapshot, RouterStateSnapshot, Router } from "@angular/router";
import { Product } from "../product/product.component";
import { Observable } from "rxjs/Observable";
import { Injectable } from "@angular/core";

@Injectable()
export class ProductResolve implements Resolve<Product> {
    constructor(private router: Router) { }
    resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Product | Observable<Product> | Promise<Product> {
        let productId: number = route.params["id"];
        if (productId == ) {
            return new Product("pingguo7", );
        }
        else {
            this.router.navigate(['/home']);
            return undefined;
        }
    }
}

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { HomeComponent } from './home/home.component';
import { ProductComponent } from './product/product.component';
import { Code404Component } from './code404/code404.component';
import { ProductDescComponent } from './product-desc/product-desc.component';
import { SellerInfoComponent } from './seller-info/seller-info.component';
import { ChatComponent } from './chat/chat.component';
import { LoginGuard } from './guard/login.guard';
import { UnsacedGuard } from './guard/unsaced.guard';
import { ProductResolve } from './guard/product.resolve';

const routes: Routes = [
  {
    path: '',
    redirectTo: '/home',
    pathMatch: 'full'
  },
  {
    path: 'chat',
    component: ChatComponent,
    outlet: 'aux'
  },
  {
    path: 'home',
    component: HomeComponent
  },
  {
    path: 'product/:id',
    component: ProductComponent,
    children: [
      { path: '', component: ProductDescComponent },
      { path: 'seller/:id', component: SellerInfoComponent }
    ],
    resolve: {
      product: ProductResolve
    }
  }
  ,
  {
    path: '**',
    component: Code404Component
  }
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule],
  providers: [LoginGuard, UnsacedGuard, ProductResolve]
})
export class AppRoutingModule { }

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

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

  private productId: number;
  private productName: string;
  constructor(private routeInfo: ActivatedRoute) { }

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

}

export class Product {
  constructor(public Name: string, public id: number) { }
}