如果用户未登录Angular2 2.0.0-rc.4，则重定向到登录路由

import { Injectable } from '@angular/core';
import { CanActivate, Router } from '@angular/router';

@Injectable()
export class AuthGuard implements CanActivate {
  constructor(private router: Router) {}

  canActivate(): boolean {
    // 判断用户是否已登录，这里可以根据具体业务逻辑进行判断
    const isLoggedIn = ...; // 根据实际情况获取登录状态

    if (!isLoggedIn) {
      // 未登录，重定向到登录路由
      this.router.navigate(['/login']);
      return false;
    }

    return true;
  }
}

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { AuthGuard } from './auth.guard';
import { DashboardComponent } from './dashboard.component';

const routes: Routes = [
  { path: 'dashboard', component: DashboardComponent, canActivate: [AuthGuard] },
  // 其他路由配置...
];

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