How to throw an exception back in JSON in Spring Boot

Question

I have a Request Mapping -

  @RequestMapping(\"/fetchErrorMessages\")
  public @ResponseBody int fetchErrorMessages(@RequestParam(\"startTime\") String star         


        

Answer 1

Javax has a interface name as ExceptionMapper. Please refer the below code snippet, For every RuntimeException in your application it will map it to a Json Response entity.

public class RuntimeExceptionMapper implements ExceptionMapper  {

@Override
public Response toResponse(RuntimeException exception) {
    ErrorResponse errorResponse = new ErrorResponse();
    errorResponse.setMessage(exception.getMessage);
    if (exception== null) {
        logger.error("Exception Details Not found");            
    } else {
        return Response.status(Status.INTERNAL_SERVER_ERROR)
            .entity(errorResponse )
                .type(MediaType.APPLICATION_JSON)
                    .header("trace-id", "1234").build();
    }


}

}