docs: public static int getPage(final HttpServletRequest request) {
          int ret = 1;
          final String p = request.getParameter("p");
          if (Strings.isNumeric(p)) {
              try {
                  ret = Integer.parseInt(p);
              } catch (final Exception e) {
                  // ignored
              }
          }
  
          if (1 > ret) {
              ret = 1;
          }
  
          return ret;
      }