spring获取controller方法中自定义注解的信息

public class RequestMappingHandlerMapping extends RequestMappingInfoHandlerMapping
        implements MatchableHandlerMapping, EmbeddedValueResolverAware {

    private boolean useSuffixPatternMatch = true;

    private boolean useRegisteredSuffixPatternMatch = false;

    private boolean useTrailingSlashMatch = true;

    private ContentNegotiationManager contentNegotiationManager = new ContentNegotiationManager();

    private StringValueResolver embeddedValueResolver;

    private RequestMappingInfo.BuilderConfiguration config = new RequestMappingInfo.BuilderConfiguration();

    //....
}

for(Map.Entry<RequestMappingInfo,HandlerMethod> entry : urlMethodMapping.entrySet()){

            RequestMappingInfo info = entry.getKey();
            HandlerMethod handlerMethod = entry.getValue();
            Method method = handlerMethod.getMethod();

            if(!method.isAnnotationPresent(DemoAnno.class)){
                continue;
            }

            DemoAnno demoAnno = method.getAnnotation(DemoAnno.class);
            //......
        }

@Override
    public void onApplicationEvent(ContextRefreshedEvent contextRefreshedEvent) {
        //.......
    }