TokenEndpoint : Handling Null Pointer Exception

springboot oauth2.0生成token时报错, 详细的日志没有打印出来, 需要手动配置log

    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {

        endpoints.authenticationManager(authenticationManager);
        endpoints.userDetailsService(userDetailsService);
        endpoints.tokenServices(tokenServices());
        DefaultWebResponseExceptionTranslator defaultWebResponseExceptionTranslator = new DefaultWebResponseExceptionTranslator() {
            @Override
            public ResponseEntity<OAuth2Exception> translate(Exception e) throws Exception {
                logger.error("生成token异常", e);
                ResponseEntity<OAuth2Exception> responseEntity = super.translate(e);
                HttpHeaders headers = new HttpHeaders();
                headers.setAll(responseEntity.getHeaders().toSingleValueMap());
                OAuth2Exception excBody = responseEntity.getBody();
                return new ResponseEntity<>(excBody, headers, responseEntity.getStatusCode());
            }
        };
        endpoints.exceptionTranslator(defaultWebResponseExceptionTranslator);
    }