message: alter the util
diff: @@ -374,12 +374,15 @@ public:
  static std::string getTimeName();
  static std::string getTimeString();
  + static std::string getTimeString2();
  + static int getRandNum();
  static std::string get_folder_name(const std::string path, const std::string db_name);
  static std::string get_backup_time(const std::string path, const std::string db_name);
  static long get_cur_time();
  static int get_time();
  static int str2time();
  static std::string get_date_time();
  + static std::string get_date_day();
  static std::string get_timestamp();
  static time_t time_to_stamp(std::string time);
  static bool save_to_file(const char*, const std::string _content);
  