Spring boot 404 error custom error response ReST

Question

I'm using Spring boot for hosting a REST API. Instead of having the standard error response I would like to always send a JSON response even if a browser is accessing the URL and as well a custom data structure.

I can do this with @ControllerAdvice and @ExceptionHandler for custom exceptions. But I can't find any good ways of doing this for standard and handled errors like 404 and 401.

Are there any good patterns of how to do this?

Answer 1

For those Spring Boot 2 users who don't wanna use @EnableWebMvc

application.properties

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

ControllerAdvice

@RestControllerAdvice public class ExceptionResolver {      @ExceptionHandler(NoHandlerFoundException.class)     @ResponseStatus(HttpStatus.NOT_FOUND)     public HashMap<String, String> handleNoHandlerFound(NoHandlerFoundException e, WebRequest request) {         HashMap<String, String> response = new HashMap<>();         response.put("status", "fail");         response.put("message", e.getLocalizedMessage());         return response;     } } 

Source