Spring Boot with Custom Converters breaks Swagger & how to move it - spring-boot

Question

I have a very simple Spring Boot application. I launch this through the basic SpringApplication.run(Startup.class, args); and have a custom #Configuration class in there that overrides the default converters. I decided to add Swagger to the mix of things so that I can generate better documentation for our internal user base as there are gads of endpoints.
When I started things up, Swagger simply wouldn't work.
I decided to start a front-scratch Spring Boot with just one endpoint to document to see what went wrong. Out-of-the box this worked perfectly fine and I was able to get Swagger running via just hitting the http://localhost:8080/swagger-ui.html base URL.
When I implemented my custom #Configuration class that extended WebMvcConfigurationSupport, Swagger no longer worked.
My configuration overrode a single method:
#Configuration
public class StartupConfiguration extends WebMvcConfigurationSupport {
#Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
converters.add(getJsonConverter());
}
}
That's it. I decided to add the default converters as well without any luck. Then I just emptied the class and left it as:
#Configuration
public class StartupConfiguration extends WebMvcConfigurationSupport {
}
Swagger is still broken - if I remove the class completely, then it works.
What can I do to keep my custom configuration data and run Swagger? I would also love to move it to something like http://localhost:8080/swagger/ rather than the default file it uses, but that is a completely separate issue for now.
My launch of Swagger looks like this:
#Configuration
#EnableSwagger2
public class SwaggerConfiguration {
#Bean
public Docket getDocket() {
// ...
return new Docket(DocumentationType.SWAGGER_2)
.groupName("Core API")
.apiInfo(infoBuilder.build())
.select().paths(PathSelectors.regex("/*"))
.build();
}
}

Answer 1

Overriding the default resource handler worked for me. I added the following to the configuration class extending WebMvcConfigurationSupport:
#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/");
}