Spring Boot Actuator(WebMvcEndpointHandlerMapping)

@ManagementContextConfiguration
@ConditionalOnWebApplication(type = Type.SERVLET)
@ConditionalOnClass(DispatcherServlet.class)
@ConditionalOnBean({ DispatcherServlet.class, WebEndpointsSupplier.class })
@EnableConfigurationProperties(CorsEndpointProperties.class)
public class WebMvcEndpointManagementContextConfiguration {

	@Bean
	// *************************************************************
	// 重点:Spring设计的优势就在于这里,可以允许你写重掉这个Bean
	// 当容器中,不存在这个Bean时,这个配置才会生效,所以,你自己写一个Bean就好了,就能让这里的逻辑失效.
	// *************************************************************
	@ConditionalOnMissingBean
	// WebMvcEndpointHandlerMapping XXXHandlerMapping属于Spring MVC中的一部份.
	public WebMvcEndpointHandlerMapping webEndpointServletHandlerMapping(
			WebEndpointsSupplier webEndpointsSupplier,
			ServletEndpointsSupplier servletEndpointsSupplier,
			ControllerEndpointsSupplier controllerEndpointsSupplier,
			EndpointMediaTypes endpointMediaTypes, CorsEndpointProperties corsProperties,
			WebEndpointProperties webEndpointProperties) {
		List<ExposableEndpoint<?>> allEndpoints = new ArrayList<>();
		Collection<ExposableWebEndpoint> webEndpoints = webEndpointsSupplier
				.getEndpoints();
		allEndpoints.addAll(webEndpoints);
		allEndpoints.addAll(servletEndpointsSupplier.getEndpoints());
		allEndpoints.addAll(controllerEndpointsSupplier.getEndpoints());
		EndpointMapping endpointMapping = new EndpointMapping(
				webEndpointProperties.getBasePath());
		return new WebMvcEndpointHandlerMapping(endpointMapping, webEndpoints,
				endpointMediaTypes, corsProperties.toCorsConfiguration(),
				new EndpointLinksResolver(allEndpoints,
						webEndpointProperties.getBasePath()));
	}
	
	// ... ...
}

class WebMvcEndpointExtHandlerMapping extends WebMvcEndpointHandlerMapping {

	public WebMvcEndpointExtHandlerMapping(EndpointMapping endpointMapping, Collection<ExposableWebEndpoint> endpoints,
			EndpointMediaTypes endpointMediaTypes, CorsConfiguration corsConfiguration,
			EndpointLinksResolver linksResolver) {
		super(endpointMapping, endpoints, endpointMediaTypes, corsConfiguration, linksResolver);
	}

	@Override
	protected void extendInterceptors(List<Object> interceptors) {
		super.extendInterceptors(interceptors);
		// **************************************************
		// 添加你自定义的拦截器即可
		// **************************************************
		interceptors.add(new CustomHandlerInterceptor());
	}
} // WebMvcEndpointExtHandlerMapping

class CustomHandlerInterceptor implements HandlerInterceptor {
	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
			throws Exception {
		System.out.println("=================================================");
		return true;
	}
}// end CustomHandlerInterceptor

@Bean
public WebMvcEndpointHandlerMapping webEndpointServletHandlerMapping(
		WebEndpointsSupplier webEndpointsSupplier,
		ServletEndpointsSupplier servletEndpointsSupplier,
		ControllerEndpointsSupplier controllerEndpointsSupplier,
		EndpointMediaTypes endpointMediaTypes, CorsEndpointProperties corsProperties,
		WebEndpointProperties webEndpointProperties) {
	List<ExposableEndpoint<?>> allEndpoints = new ArrayList<ExposableEndpoint<?>>();
	Collection<ExposableWebEndpoint> webEndpoints = webEndpointsSupplier
			.getEndpoints();
	allEndpoints.addAll(webEndpoints);
	allEndpoints.addAll(servletEndpointsSupplier.getEndpoints());
	allEndpoints.addAll(controllerEndpointsSupplier.getEndpoints());
	EndpointMapping endpointMapping = new EndpointMapping(
			webEndpointProperties.getBasePath());
	// **********************************************************		
	// 使用自定义:WebMvcEndpointExtHandlerMapping
	// **********************************************************		
	return new WebMvcEndpointExtHandlerMapping(endpointMapping, webEndpoints,
			endpointMediaTypes, corsProperties.toCorsConfiguration(),
			new EndpointLinksResolver(allEndpoints,
					webEndpointProperties.getBasePath()));
}