Renaming file extension in batch

问题

I've got a few files like this:

I'm wanting to change them all to *.gz

This is the code I've written to try to change the file extensions:

ren *.dat.gz.gz.gz.gz *.gz

But this doesn't do anything. Thanks.

回答1:

ren ????????.dat.gz.* ????????.gz

or, if the .dat part is needed

ren ????????.dat.gz.* ????????.dat.gz

回答2:

Try this:

@echo off
setlocal enabledelayedexpansion

for %%a in (*.gz) do (
   set "file=%%a" 
   set "file=!file:.gz.gz.gz=!"
   echo ren "%%~nxa" "!file!"
)

Run it from the location of the .gz files. Remove the Echo when the screen output looks right.

回答3:

It works too:

@echo off
for /f %%a in ('dir /b /s *.gz') do (
 for /f "delims=. tokens=1" %%b in ('echo/%%~na') do (ren "%%a" "%%b.gz")
)

来源：https://stackoverflow.com/questions/22717482/renaming-file-extension-in-batch