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1

I have some file such as AAA_a001.jpg, BBB_a002.jpg, CCC_a003.jpg in Windows 7 and I'm trying to use batch to rename these file to a001_AAA.jpg, a002_BBB.jpg, a003_CCC.jpg.

Just to swap the content between _.

I have been searching for a while, but still don't know how to do this. Can anyone help? Thanks.

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4 Answers 4

up vote 1 down vote accepted 
@echo off
pushd "pathToYourFolder" || exit /b
for /f "eol=: delims=" %%F in ('dir /b /a-d *_*.jpg') do (
  for /f "tokens=1* eol=_ delims=_" %%A in ("%%F") do ren "%%F" "%%~nB_%%A%%~xF"
)
popd

Note: The name is split at the first occurrence of _. If a file is named "part1_part2_part3.jpg", then it will be renamed to "part2_part3_part1.jpg"

share|improve this answer
    
This is exactly what I need. Thanks!! – yuchien Dec 24 '12 at 6:39
    
still a minor problem: it swap ".jpg" too. Ex. part1_part2.jpg => part2.jpg_part1 Orz – yuchien Dec 24 '12 at 6:45
    
@raphael0914 - ??? It works perfectly for me: part1_part2.jpg --> part2_part1.jpg – dbenham Dec 24 '12 at 9:41
up vote 5 down vote

Use REN Command

Ren is for rename

ren ( where the file is located ) ( the new name )

example

ren C:\Users\&username%\Desktop\aaa.txt bbb.txt

it will change aaa.txt to bbb.txt

Your code will be :

ren (file located)AAA_a001.jpg a001.AAA.jpg

ren (file located)BBB_a002.jpg a002.BBB.jpg

ren (file located)CCC_a003.jpg a003.CCC.jpg

and so on

IT WILL NOT WORK IF THERE IS SPACES!

Hope it helps :D

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1  
just to swap the content between '_' Do you understand what the question is? – jadkik94 Dec 23 '12 at 18:02
    
I know I should use ren to rename the file, but my problem is I don't know how to do those string manipulations Orz – yuchien Dec 23 '12 at 18:02
    
Not really :/ Please use a good explanation of swap the content? – Itsproinc Dec 23 '12 at 18:05
    
There's a pattern that goes like PART1_PART2.EXT and OP wants to rename all files in a certain directory to PART2_PART1.EXT. I guess :P – jadkik94 Dec 23 '12 at 18:07
    
You should fix the title and the questions.... youre making people confusing... – Itsproinc Dec 23 '12 at 18:07
up vote 1 down vote

as Itsproinc said, the REN command works!

but if your file path/name has spaces, use quotes " "

example:

ren C:\Users\&username%\Desktop\my file.txt not my file.txt

add " "

ren "C:\Users\&username%\Desktop\my file.txt" "not my file.txt"

hope it helps

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up vote 0 down vote

I am assuming you know the length of the part before the _ and after the underscore, as well as the extension. If you don't it might be more complex than a simple substring.

cd C:\path\to\the\files
for /f %%a IN ('dir /b *.jpg') do (
set p=%a:~0,3%
set q=%a:~4,4%
set b=%p_%q.jpg
ren %a %b
)

I just came up with this script, and I did not test it. Check out this and that for more info.

IF you want to assume you don't know the positions of the _ and the lengths and the extension, I think you could do something with for loops to check the index of the _, then the last index of the ., wrap it in a goto thing and make it work. If you're willing to go through that trouble, I'd suggest you use WindowsPowerShell (or Cygwin) at least (for your own sake) or install a more advanced scripting language (think Python/Perl) you'll get more support either way.

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