me.namila.RESTSpringTest.Exception.RestExceptionHandler.java

@ControllerAdvice
public class RestExceptionHandler extends ResponseEntityExceptionHandler
{
	@ExceptionHandler(ResourceNotFoundException.class)
	public ResponseEntity<Object> resourceEntityNotFound( ResourceNotFoundException ex )
	{
		ApiError apiError = createError( ex.getLocalizedMessage(), HttpStatus.BAD_REQUEST, ex );
		return new ResponseEntity<>( apiError, apiError.getStatus() );
	}

	
	private ApiError createError( String msg, HttpStatus status, Exception e )
	{
		ApiError apiError = new ApiError( status );
		apiError.setMessage( msg );
		apiError.setDebugMessage( e.getMessage() );
		return apiError;
	}

}

ResourceNotFoundException.java

@ResponseStatus(HttpStatus.NOT_FOUND)
public class ResourceNotFoundException extends RuntimeException
{
	public ResourceNotFoundException( String exception )
	{
		super( exception );
	}
}