Not able to acesss swagger UI while using springdoc-openapi-ui

[sc-sityad]

I am using : java : 1.8 springboot: 2.7.15 maven: 3.x springdoc-openapi-ui : 1.7.0 or 1.8.0

I am able to access http://localhost:8000/v3/api-docs and get json response. But not able to access http://localhost:8000/swagger-ui.html

I think it is kind of a bug. I cannot change my java and spring boot version since all the dependencies are set accordingly in my whole project. Can any one tell me why this is happenning?

Error I got in UI: Whitelabel Error Page

This application has no explicit mapping for /error, so you are seeing this as a fallback. null There was an unexpected error (type=null, status=null).

[joris-lambrechts]

I encountered a similar problem. The reason is that I do not use @org.springframework.web.servlet.config.annotation.EnableWebMvc but define a custom org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport bean. As a result, the org.springdoc.webmvc.ui.SwaggerWebMvcConfigurer is not applied, I assume because it implements a org.springframework.web.servlet.config.annotation.WebMvcConfigurer.

By changing the base class from org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport to org.springframework.web.servlet.config.annotation.DelegatingWebMvcConfiguration the org.springdoc.webmvc.ui.SwaggerWebMvcConfigurer is applied.

Make sure to delegate to the super class if you override any methods. For example

    @Override
    public void addResourceHandlers(@Nonnull ResourceHandlerRegistry registry) {
        super.addResourceHandlers(registry);

        registry.addResourceHandler("/html/**").addResourceLocations("classpath:/some/path/");
    }

See https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/web/servlet/config/annotation/EnableWebMvc.html for more information.