spring security oauth2之refresh token

@Configuration
@EnableAuthorizationServer //提供/oauth/authorize,/oauth/token,/oauth/check_token,/oauth/confirm_access,/oauth/error
public class OAuth2ServerConfig extends AuthorizationServerConfigurerAdapter {
    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.inMemory()
                .withClient("demoApp")
                .secret("demoAppSecret")
                .redirectUris("http://localhost:8081/callback") //新增redirect_uri
                .authorizedGrantTypes("authorization_code", "client_credentials", "refresh_token",
                        "password", "implicit")
                .scopes("all")
                .resourceIds("oauth2-resource")
                .accessTokenValiditySeconds(120)
                .refreshTokenValiditySeconds(60);
    }
}

    @Autowired
    private UserDetailsService userDetailsService;

    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
        endpoints.authenticationManager(authenticationManager);
        endpoints.userDetailsService(userDetailsService);
    }

HTTP/1.1 500
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: 0
X-Frame-Options: DENY
X-Application-Context: application
Cache-Control: no-store
Pragma: no-cache
Content-Type: application/json;charset=UTF-8
Transfer-Encoding: chunked
Date: Wed, 06 Dec 2017 13:35:33 GMT
Connection: close

{"error":"server_error","error_description":"UserDetailsService is required."}

curl -i -d "grant_type=authorization_code&code=uKGjVz&client_id=demoApp&client_secret=demoAppSecret&redirect_uri=http://localhost:8081/callback" -X POST http://localhost:8080/oauth/token

curl -i -X POST  -u 'demoApp:demoAppSecret' -d 'grant_type=refresh_token&refresh_token=95844d87-f06e-4a4e-b76c-f16c5329e287' http://localhost:8080/oauth/token

HTTP/1.1 200
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: 0
X-Frame-Options: DENY
X-Application-Context: application
Cache-Control: no-store
Pragma: no-cache
Content-Type: application/json;charset=UTF-8
Transfer-Encoding: chunked
Date: Wed, 06 Dec 2017 13:51:47 GMT

{"access_token":"eb45f1d4-54a5-4e23-bf12-31d8d91a902f","token_type":"bearer","refresh_token":"efa96270-18a1-432c-b9e6-77725c0dabea","expires_in":1199,"scope":"all"}

HTTP/1.1 200
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: 0
X-Frame-Options: DENY
X-Application-Context: application
Cache-Control: no-store
Pragma: no-cache
Content-Type: application/json;charset=UTF-8
Transfer-Encoding: chunked
Date: Wed, 06 Dec 2017 14:03:50 GMT

{"access_token":"a78999d6-614a-45fe-be58-d5e0b6451bdb","token_type":"bearer","refresh_token":"bb2a0165-769d-43b0-a9a5-1331012ede1f","expires_in":119,"scope":"all"}

HTTP/1.1 401
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Cache-Control: no-cache, no-store, max-age=0, must-revalidate
Pragma: no-cache
Expires: 0
X-Frame-Options: DENY
X-Application-Context: application
Cache-Control: no-store
Pragma: no-cache
WWW-Authenticate: Bearer error="invalid_token", error_description="Invalid refresh token (expired): 95844d87-f06e-4a4e-b76c-f16c5329e287"
Content-Type: application/json;charset=UTF-8
Transfer-Encoding: chunked
Date: Wed, 06 Dec 2017 14:09:57 GMT

{"error":"invalid_token","error_description":"Invalid refresh token (expired): 95844d87-f06e-4a4e-b76c-f16c5329e287"}