swagger的configurature类

@Configuration
public class SpringFoxConfig {
//API文档访问http://localhost:80/swagger-ui.index
   @Bean
   public Docket api(){
return new Docket(DocumentationType.SWAGGER_2)
.apiInfo(apiInfo())
.select()
.apis(RequestHandlerSelectors.any())
.paths(PathSelectors.any())
.build();
   }

private ApiInfo apiInfo(){
return new ApiInfoBuilder()
.title("慕慕生鲜")
.description("")
.termsOfServiceUrl("")
.build();
   }
}

@Configuration
public class FreshWebMVCConfig implements WebMvcConfigurer {
@Override
   public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("swagger-ui.html").addResourceLocations("classpath:/META-INF/resources/");
       registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
   }
}

以上两个配置类，请老师详细讲一下？

怎么理解？有点乱，头大？