(2020-2-6 19:39:57)
rename aaa.txt "A%date:~0,4%-%date:~5,2%-%date:~8,2%_%time:~0,2%-%time:~3,2%-%time:~6,2%_backup.txt"
新建文件.(2020-2-6 19:42:26)
s
>符号.
date几种区别.
E:\>echo %date%
2020/02/06 周四
E:\>echo %date~0,4%
%date~0,4%
E:\>echo %date:~0,4%
2020
E:\>echo %date%
2020/02/06 周四
E:\>type %date%
命令语法不正确。