Question

I have a custom exception class annotated to return a given HttpStatus:

@ResponseStatus(value=HttpStatus.BAD_REQUEST, reason="Invalid parameter")
public class BadRequestException extends RuntimeException
{
  public BadRequestException(String msg)
  {
    super(msg);
  }
}

This works when I throw a BadRequestException from my controller but the reason is always “Invalid parameter” of course. Is there a way to set the returned reason in this class? I’d like to pass a string to be used as the reason.

Thanks!

Answer 1

You can use HttpServletResponse‘s sendError function to achieve that.
Here is an example of how to use it:

@RequestMapping(value = "some/url", method = RequestMethod.POST)
public void doAction(final HttpServletResponse response) throws IOException {
  response.sendError(HttpStatus.BAD_REQUEST.value(), "custom error message");
}