1、

@echo off & setlocal enableDelayedExpansion

set a=

set /p a=Please drag your txt file for split:

cls

:: %% 两个百分号 不带文件名后缀

for %%k in (%a%) do set wjm=%%~nk

2、 
 调用call echo %~nx1

set /p a=Please drag your txt file for split:

call :getname !a!
:getname
echo  %~nx1