批处理，一件修改JPG文件名字为其MD5值

@echo off
setlocal enabledelayedexpansion
for /f "delims=" %%a in ('dir /b *.jpg') do (
    for /f "delims=" %%b in ('md5.exe -n "%%a"') do (
        ren "%%a" "%%b.jpg"
    )
)
pause

md5.exe放在同一目录下