https://blog.csdn.net/xx326664162/article/details/48087709
iOS多线程下单例
http://www.dreamingwish.com/article/gcd-guide-dispatch-once-1.html
iOS多线程开发
https://blog.csdn.net/shenjie12345678/article/details/44152605
Spring Boot使用本地jar包
Spring Boot应用可视化监控（Prometheus + Grafana）
python第三方库
https://www.lfd.uci.edu/~gohlke/pythonlibs/