Angular2 rc5>组件没有被加载

我最近从RC4转到了Angular2 RC5。从那以后，我遇到了一些问题。我不确定这些问题是我的过错还是过渡。我的app组件是这样的:

import {Component, OnInit} from "@angular/core";
import {SetLocationService} from "./auth/set-location.service";
@Component({
  selector : "my-app",
  template: `
  <app-header></app-header>
    <router-outlet></router-outlet>
  <app-footer></app-footer>
  `
})
export class AppComponent implements OnInit{
  constructor(
    private _setLocationService : SetLocationService
  ){}
  ngOnInit() {
    this._setLocationService.setLocation();
  }
}

import {Routes, RouterModule} from '@angular/router';
import {SearchBoxComponent} from "./search/searchBox.component";
import {SearchResultComponent} from "./search/search-result.component";
import {LoginComponent} from "./auth/login.component";
import {SignupComponent} from "./auth/signup.component";
import {LogoutComponent} from "./auth/logout.component";
import {RecoverPasswordComponent} from "./auth/recover-password.component";
import {ProfileComponent} from "./auth/profile.component"
import {AccountComponent} from "./auth/account.component"
const appRoutes: Routes = [
  {path : '',  component: SearchBoxComponent},
  {path : 'login',  component: LoginComponent},
  {path : 'signup', component: SignupComponent},
  {path : 'logout', component: LogoutComponent},
  {path : 'profile', component: ProfileComponent},
  {path : 'account', component: AccountComponent},
  {path : 'user/:uname', component: SearchBoxComponent},
  {path : 'recover-password', component: RecoverPasswordComponent},
  {path : 'search/:params', component: SearchResultComponent},
  {path : '**', component : SearchBoxComponent}
];
export const routing = RouterModule.forRoot(appRoutes);

// @Modules -> Modules
import {BrowserModule} from '@angular/platform-browser';
import {FormsModule} from '@angular/forms';
import {HttpModule} from '@angular/http';
import {LocationStrategy, HashLocationStrategy} from '@angular/common';
import {NgModule} from '@angular/core';
// import {RouterModule} from '@angular/router';
// @Routes -> routes
import {routing} from "./app.routes";
// @Components - > Components
import {AccountComponent} from "./auth/account.component";
import {AppComponent} from './app.component';
import {ChatBoxComponent} from "./chat/chat-box.component";
import {ChatBoxDirective} from "./chat/chat-box.directive";
import {FooterComponent} from "./layout/footer.component";
import {HeaderComponent} from "./layout/header.component";
import {LoginComponent} from "./auth/login.component";
import {LogoutComponent} from "./auth/logout.component";
import {ProfileComponent} from "./auth/profile.component";
import {RecoverPasswordComponent} from "./auth/recover-password.component";
import {SearchBoxComponent} from "./search/searchBox.component";
import {SearchResultComponent} from "./search/search-result.component";
import {SignupComponent} from "./auth/signup.component";

// @providers - > services
import {AuthService} from "./auth/auth.service";
import {SetLocationService} from "./auth/set-location.service";
import {SearchService} from "./search/search.service";
@NgModule({
  imports: [
    BrowserModule,
    FormsModule,
    HttpModule,
    routing
  ],
  declarations: [
    AccountComponent,
    AppComponent,
    ChatBoxComponent,
    ChatBoxDirective,
    FooterComponent,
    HeaderComponent,
    LoginComponent,
    LogoutComponent,
    ProfileComponent,
    RecoverPasswordComponent,
    SearchBoxComponent,
    SearchResultComponent,
    SignupComponent
  ],
  providers : [
    AuthService,
    SetLocationService,
    SearchService,
    {provide: LocationStrategy, useClass: HashLocationStrategy}
  ],
  bootstrap: [
    AppComponent,
    HeaderComponent,
    FooterComponent
  ]
})
export class AppModule {}

我的第一个问题是，如果我不加1。HeaderComponent 2。在app.module的bootstrap中没有FooterComponent。当根路由处于活动状态(localhost:3000)时，HeaderComponent (2.FooterComponent)会被加载，而SearchBoxComponent (2.FooterComponent)会被加载。我有点困惑，因为我没有在官方文档中看到在bootstrap中添加多个组件。

我的第二个问题几乎和第一个一样。如果我像下面的代码一样在另一个组件中嵌入一个组件(seachboxcomponent)，则不会加载seachboxcomponent组件，而是加载其他部分。

@Component({
    selector: "search-result",
    template : `
            <seachBox></searchBox>
    <div class="tag_list">
      <p *ngFor = "let tag of result.obj.tags" class = "tag-li" >
        <a [routerLink] = "['/search', tag]" (click) = "onSearchCliked($event, tag)"> {{tag}} </a>
      </p>
    </div>
`
})

我想知道，有没有人可以帮助我，我已经在这个问题上工作了几天，但我仍然被困在这里