@ExceptionHandler(HttpMessageNotReadableException.class)
    @ResponseStatus(value = HttpStatus.BAD_REQUEST)
    @ResponseBody
    protected ErrorMessage handleJsonException(final HttpMessageNotReadableException ex, final HttpServletRequest request)
{
    if (ex.getCause() instanceof JsonParseException)
    {
       // some code
    }
    if (ex .getCause() instanceof JsonMappingException)
    {
       // some code
    }
}

{firstName":"abc","lastName":"xyz"}

Throwable throwable = ex.getCause();
String field = invalidFormatException.getTargetType().getTypeName();
String message = invalidFormatException.getOriginalMessage();