Determine whether uuid is legal

    /**
     * Check if the string is a valid uuid,
     *
     * @param uuidStr
     * @return returns true, not false
      */ 
    public  static  boolean checkIsUuid(String uuidStr) {
         try {
            UUID.fromString(uuidStr).toString();
        } catch (Exception e) {
            //e.printStackTrace();
            return false;
        }
        return true;
    }