bat 截取字符

1.例子

echo %time:～0，-1% 

显示时间字符，从第0个到最后一个

C:\Documents and Settings>echo %time:~0,-1%
19:00:22.3

C:\Documents and Settings>echo %time%
19:00:29.49

C:\Documents and Settings>echo %date:~2,-1%
12-09-27 星期

C:\Documents and Settings>echo %date:~,3%  //第2个参数为正则表示显示的个数，为负则表示显示字符的终点下标
201

C:\Documents and Settings>echo %date:~1,3%
012

 

2.other

set str=i love you

C:\Documents and Settings>echo %str:~3%
ove you

C:\Documents and Settings>echo %str:~,-1%
i love yo