Custom exception handler for NoHandlerFoundException is not working without @EnableWebMvc

Question

I want to override html error page for 404 responses as an JSON response. When i use @ControllerAdvice without @EnableWebMvc it is not working.

Answer 1

Normally @utkusonmez answer works fine but not in my case, as I am using swagger. So all I did is add following properties in my application.properties file

spring.mvc.throw-exception-if-no-handler-found=true
spring.mvc.static-path-pattern=/swagger*

Now both NoHandlerFoundException and swagger-ui works fine.

Answer 2

This is happening because, using @EnableWebMvc disables MVC autoconfiguration and asks you to provide exactly what You want. Have a look at this link
You can either use other means to customize your configuration, such as a @Configuration See Boot's WebMvcAutoConfiguration to find out what the defaults are, and copy over the pieces that you need.

This Link might help You as well -> LINK

What should you do when you want to customize your beans? As usual, extend WebMvcConfigurerAdapter (annotate the new class with @Component) and do your customizations.
So, bottom line of the particular problem: Don’t use @EnableWebMvc in Spring Boot, just include spring-web as a maven/gradle dependency and it will be autoconfigured.

This answer on stackoverflow shows how to do this .. check this LINK3

Answer 3

I easily resolved problem by adding one of configurations in application.yml.

spring.mvc.throw-exception-if-no-handler-found=true
spring.resources.add-mappings=false

or

spring.mvc.throw-exception-if-no-handler-found=true
spring.mvc.static-path-pattern: /static

If you don't restrict Spring and no handler matches with your request, then spring tries to look for static content.