angular6.0使用教程之父组件通过url传递id给子组件的方法

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import {HomeComponent} from "./home/home.component"; //引入home组件
import {ListComponent} from "./list/list.component";//引入list组件
import {PostComponent} from "./post/post.component";//引入post组件
const routes: Routes = [
 { path:'home', component:HomeComponent },
 { path:'list', component:ListComponent },
 //post组件路由
 { path:'post/:id', component:PostComponent },
 { path:'**', redirectTo:'/home' }
];
@NgModule({
 imports: [RouterModule.forRoot(routes)],
 exports: [RouterModule]
})
export class AppRoutingModule { }

getPost(id:number):Observable<any>{
 return this.http.get("/api/dream/index.php/home/index/post_detail/id/"+id);
}

import {DbService} from "../db.service";

import {ActivatedRoute} from "@angular/router";

constructor(private db:DbService,private route:ActivatedRoute) { }

post:any;

getPost():void{
 var id = +this.route.snapshot.paramMap.get('id'); //获取当前Post的产品id
 this.db.getPost(id).subscribe( //通过db:DbService的getPost()方法获取数据
 data=>{ this.post = data; //把产品全部的信息赋值给post变量 }
 );
}

ngOnInit() {
 this.getPost(); 
}

<div class="post_detail" *ngIf="post">
 <h1>{{ post.name }}</h1>
 <h3>{{ post.addtime }}</h3> 
 <ul [innerHTML]="post.content"></ul>
</div>