我在刚才的答复中亦有这样的建议
注册拦截器如下

import { HTTP_INTERCEPTORS } from '@angular/common/http';
import { UnauthorizedInterceptor } from './../auth/UnauthorizedInterceptor';
@NgModule({
  bootstrap: [AppComponent],
  imports: [...],
  providers: [
    {
      provide: HTTP_INTERCEPTORS,
      useClass: UnauthorizedInterceptor,
      multi: true
    }
  ]
})
export class AppModule {}

读取：UNAUTHORIZED INTERCEPTER FOR ANGULAR

import 'rxjs/add/operator/catch';
import 'rxjs/add/observable/empty';

@Injectable()
export class UnauthorizedInterceptor implements HttpInterceptor {
    constructor(
        private router: Router
    ) {}

    intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
        return next.handle(request).catch((err: any) => {
            if (err instanceof HttpErrorResponse && err.status === 401) {
                this.router.navigate(['/login'], {
                    queryParams: {
                        redirectTo: document.location.pathname
                    }
                });

                // this response is handled
                // stop the chain of handlers by returning empty
                return Observable.empty();
            }

            // rethrow so other error handlers may pick this up
            return Observable.throw(err);
        });
    }

试试看，在观测上用catch方法，在航路上用navigate方法导航

return next.handle(req).catch(
(err: HttpErrorResponse) => {
   this.router.navigate(['/auth/not-activated']);
    return Observable.throw(err);
  });