@echo off
setlocal enabledelayedexpansion

:: 创建一个变量来存储当前日期和时间
for /f "tokens=2 delims==" %%a in ('wmic os get localdatetime /value') do set datetime=%%a

:: 格式化日期时间字符串
set datetime=%datetime:~0,4%-%datetime:~4,2%-%datetime:~6,2%_%datetime:~8,2%-%datetime:~10,2%-%datetime:~12,2%

:: 输出文件名
set outputfile=md5sums_%datetime%.txt

:: 清空输出文件
echo. > "%outputfile%"

:: 计算MD5并输出到文件
for %%f in (*) do (
    certutil -hashfile "%%f" MD5 >> "%outputfile%"
    echo. >> "%outputfile%"
)

:: 完成提示
echo MD5 sums have been calculated and saved to "%outputfile%".
endlocal