如何在Angular 5中重定向到401响应的登录页面？

ng generate service interceptors/auth

import { Injectable } from '@angular/core';
import { HttpEvent, HttpInterceptor, HttpHandler, HttpRequest, HttpErrorResponse } from '@angular/common/http';
import { Observable, throwError } from 'rxjs';
import { catchError, tap } from 'rxjs/operators';
import { Router } from '@angular/router';

@Injectable()
export class AuthInterceptor implements HttpInterceptor {

  constructor(private router: Router) {}

  intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    return next.handle(req).pipe(
      catchError((error: HttpErrorResponse) => {
        if (error.status === 401) {
          // 重定向到登录页面
          this.router.navigate(['/login']);
        }
        return throwError(error);
      })
    );
  }
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { RouterModule } from '@angular/router';

import { AppComponent } from './app.component';
import { LoginComponent } from './login/login.component';
import { AuthInterceptor } from './interceptors/auth.service';

@NgModule({
  declarations: [
    AppComponent,
    LoginComponent
  ],
  imports: [
    BrowserModule,
    HttpClientModule,
    RouterModule.forRoot([
      { path: 'login', component: LoginComponent },
      // 其他路由配置
    ])
  ],
  providers: [
    {
      provide: HTTP_INTERCEPTORS,
      useClass: AuthInterceptor,
      multi: true
    }
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }