☆ 1.批量换后缀

ren *.txt *.cpp

(将.txt和.cpp换成自己的后缀即可)

☆ 2.批量替换文件名中的某些字符

@echo off
setlocal enabledelayedexpansion
for %%j in (*_*) do (
set filename=%%~nj
set filename=!filename:.=_!
set filename=!filename: =!
if not "!filename!"=="%%~nj" ren "%%j" "!filename!%%~xj"
)

(自己替换)