批处理处理字符串

@echo off

rem 替换字符串
set a=www.baidu.com
set a=%a:.=-%
echo %a%

rem 截取字符串
set a=www.baidu.com
set a=%a:~4,4%

set a=www.baidu.com
set a=%a:~-5%
echo %a%

set a=www.baidu.com
set a=%a:~0,-5%
echo %a%
pause
exit