code: public static boolean doesParameterExist(final HttpServletRequest request, final String name) {
          val parameter = request.getParameter(name);
          if (StringUtils.isBlank(parameter)) {
              LOGGER.error("Missing request parameter: [{}]", name);
              return false;
          }
          LOGGER.debug("Found provided request parameter [{}]", name);
          return true;
      }
docs: Check if a parameter exists.
  
  @param request the HTTP request
  @param name    the parameter name
  @return whether the parameter exists