bat 截取字元

1.例子

echo %time:～0，-1% 

顯示時間字元，從第0個到最後一個

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個參數為正則表示顯示的個數，為負則表示顯示字元的終點下標
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