以下是一个示例angular应用程序中的刷新令牌拦截器的解决方法：

1. 创建一个新的刷新令牌拦截器文件（refresh-token.interceptor.ts）并添加以下代码：

import { Injectable } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent } from '@angular/common/http';
import { Observable } from 'rxjs';
import { AuthService } from './auth.service';
import { switchMap } from 'rxjs/operators';

@Injectable()
export class RefreshTokenInterceptor implements HttpInterceptor {

  constructor(private authService: AuthService) { }

  intercept(request: HttpRequest, next: HttpHandler): Observable> {
    return next.handle(request).pipe(
      switchMap((event: HttpEvent) => {
        return this.authService.refreshToken().pipe(
          switchMap((response: any) => {
            // 更新令牌
            this.authService.updateToken(response.access_token);
            // 克隆原始请求，并设置新的令牌
            const clonedRequest = request.clone({
              setHeaders: {
                Authorization: `Bearer ${response.access_token}`
              }
            });
            // 继续处理克隆的请求
            return next.handle(clonedRequest);
          })
        );
      })
    );
  }
}

2. 在你的AuthService中创建一个refreshToken方法，用于从服务器获取新的访问令牌。

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';

@Injectable()
export class AuthService {

  private refreshTokenUrl = 'http://example.com/api/refresh-token';
  private accessToken: string;

  constructor(private http: HttpClient) { }

  refreshToken(): Observable {
    // 发送刷新令牌请求
    return this.http.post(this.refreshTokenUrl, {}).pipe(
      map((response: any) => {
        return response;
      })
    );
  }

  updateToken(token: string): void {
    // 更新访问令牌
    this.accessToken = token;
  }

  getAccessToken(): string {
    // 获取当前访问令牌
    return this.accessToken;
  }
}

3. 在你的app.module.ts文件中将RefreshTokenInterceptor添加到HTTP_INTERCEPTORS提供者数组中。

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { HttpClientModule, HTTP_INTERCEPTORS } from '@angular/common/http';
import { RefreshTokenInterceptor } from './refresh-token.interceptor';

@NgModule({
  imports: [BrowserModule, HttpClientModule],
  providers: [
    { provide: HTTP_INTERCEPTORS, useClass: RefreshTokenInterceptor, multi: true }
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

现在，当你发出带有过期令牌的请求时，拦截器将自动请求新的令牌，并更新原始请求的令牌。然后，它将继续处理更新后的请求。