https://cloud.tencent.com/developer/article/1497641[https://cloud.tencen...

https://blog.csdn.net/weixin_45663027/article/details/133842110[https://...

讲的很清楚的：https://www.zhihu.com/question/585853184/answer/3186724183[https:...

一. 字符串工具类org.apache.commons.lang.StringUtils https://www.cnblogs.com/lia...

https://www.zhihu.com/question/425687212[https://www.zhihu.com/question/...

https://blog.csdn.net/AP0906424/article/details/109112451[https://blog.c...

https://blog.csdn.net/u012373815/article/details/88367456[https://blog.c...

setnx是「SET if Not eXists」的缩写, 只有不存在的时候才设置,可以利用它来实现锁的效果。setnx 其实是两个操作，而且这...

一. mv 用于改名 [root@iZwz909gageaynj30avzw5Z tmp]# touch test1[root@iZwz909g...