Hello, I found it didn't make sense to intercept swagger when I use javaConfig on interceptor configuration.

When xml and javaConfig are used in the same interceptor, javaConfig didn't work on swagger /v2/api-doc.

Also, I create a demo about this issue [https://github.com/minggen/springmvc-questions], and the issue could be reproduced when modifying com.example.demo.config.AutoConfig .

• When using xml configuration, there is no return value after calling http://localhost:8080/v2/api-docs .

• When using annotation configuration, the right return value would not be intercepted properly.

When I try to figure out the reason, in this line of code, I found InterceptorRegistration will wrap the custom interceptor into an instance of the MappedInterceptor class, and then put the instance into interceptors, but not into the applicationContext, so that adaptedInterceptors cannot be added for PropertySourcedRequestMappingHandlerMapping. As a result, the interceptor will not take effect.

mappedInterceptors.addAll( BeanFactoryUtils.beansOfTypeIncludingAncestors( obtainApplicationContext(), MappedInterceptor.class, true, false).values());