windows按照时间建立目录的bat文件写法

if /i %time:~0,2% lss 10 set abc=backup%date:~0,8%_%time:~1,1%_%time:~3,2%
if /i not %time:~0,2% lss 10 set abc=backup%date:~0,8%_%time:~0,2%_%time:~3,2%
md %abc%
cd %abc%