Seeking help: How to batch randomly change file names - China DOS Union Forum

Hello everyone, I'm currently facing a very tough requirement:
There are N txt files in the current directory, and I need to generate random numbers,
so that each file is renamed with a random number name, and the suffix remains unchanged.
The batch naming programs I searched for earlier can't modify like this. Especially when there are few files, the generated random numbers are very easy to repeat, and I don't know how to avoid repetition. Please help everyone.


@echo off&setlocal ENABLEDELAYEDEXPANSION
for %%a in (*.txt) do call:mytest "%%a"


:mytest

set a=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890
set /a a_=(%random%+62)%%62
set /a b_=(%random%+62)%%62
set /a c_=(%random%+62)%%62
set /a d_=(%random%+62)%%62
set /a e_=(%random%+62)%%62
set /a f_=(%random%+62)%%62
echo rename  %1 !a:~%a_%,1!!a:~%b_%,1!!a:~%c_%,1!!a:~%d_%,1!!a:~%e_%,1!!a:~%f_%,1!.txt
rename  %1 !a:~%a_%,1!!a:~%b_%,1!!a:~%c_%,1!!a:~%d_%,1!!a:~%e_%,1!!a:~%f_%,1!.txt

[ Last edited by janeter on 2007-2-4 at 11:04 PM ]

If you search the owner, you can see that there are many such posts in the forum.
By the way, ask the owner, since you are afraid of repetition, why not arrange the files in serial number form? How neat that would be. For example, 1.txt, 2.txt...

Hehe, can't search it out. The requirement is to randomly rename the files in the directory regularly, so that's why I thought of making a script to execute regularly.

How should you change this to generate non - repeating random numbers, haha

Just treat it as posting water posts

[ Last edited by ccwan on 2007-2-5 at 03:54 AM ]

```
@echo off
for %%a in (*.txt) do call:mytest "%%a"

:mytest
rename %1 %random%.txt

Studied hard for an afternoon, and finally I wrote an executable code, haha......
After execution, it can randomly rename, but the result is always:
The syntax of the command is incorrect.
Don't know how to do it. Thank you to everyone who has helped me, and wish you all a happy new year!
```

The following code can rename the txt files in the current directory to filenames between 1 and 32767, and no longer process the files that have been renamed. You can give it a try:


@echo off
for /f "delims=" %%i in ('dir /a-d /b *.txt^|findstr /v "^*\.txt$"') do call :ren_ "%%i"
pause
exit

:ren_
ren %1 %random%.txt 2>nul||goto ren_
goto :eof

The new usage and format of `findstr /v "^[0-9]*\.txt$"` are learned

Named with date and time

Floor1　janeter	Posted 2007-02-05 00:23
新手上路　Posts 3　Credits 8
Hello everyone, I'm currently facing a very tough requirement: There are N txt files in the current directory, and I need to generate random numbers, so that each file is renamed with a random number name, and the suffix remains unchanged. The batch naming programs I searched for earlier can't modify like this. Especially when there are few files, the generated random numbers are very easy to repeat, and I don't know how to avoid repetition. Please help everyone. @echo off&setlocal ENABLEDELAYEDEXPANSION for %%a in (.txt) do call:mytest "%%a" :mytest set a=abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890 set /a a_=(%random%+62)%%62 set /a b_=(%random%+62)%%62 set /a c_=(%random%+62)%%62 set /a d_=(%random%+62)%%62 set /a e_=(%random%+62)%%62 set /a f_=(%random%+62)%%62 echo rename %1 !a:~%a_%,1!!a:~%b_%,1!!a:~%c_%,1!!a:~%d_%,1!!a:~%e_%,1!!a:~%f_%,1!.txt rename %1 !a:~%a_%,1!!a:~%b_%,1!!a:~%c_%,1!!a:~%d_%,1!!a:~%e_%,1!!a:~%f_%,1!.txt [ Last edited by janeter on 2007-2-4 at 11:04 PM* ]

Floor2　ccwan	Posted 2007-02-05 00:51
金牌会员　Posts 1,160　Credits 2,725　From 河北廊坊
If you search the owner, you can see that there are many such posts in the forum. By the way, ask the owner, since you are afraid of repetition, why not arrange the files in serial number form? How neat that would be. For example, 1.txt, 2.txt...

Floor3　janeter	Posted 2007-02-05 01:00
新手上路　Posts 3　Credits 8
Hehe, can't search it out. The requirement is to randomly rename the files in the directory regularly, so that's why I thought of making a script to execute regularly.

Floor4　jmz573515	Posted 2007-02-05 01:05
银牌会员　Posts 464　Credits 1,212
How should you change this to generate non - repeating random numbers, haha

Floor5　ccwan	Posted 2007-02-05 01:51
金牌会员　Posts 1,160　Credits 2,725　From 河北廊坊
Just treat it as posting water posts [ Last edited by ccwan on 2007-2-5 at 03:54 AM ]

Floor6　janeter	Posted 2007-02-05 09:58
新手上路　Posts 3　Credits 8
``` @echo off for %%a in (*.txt) do call:mytest "%%a" :mytest rename %1 %random%.txt Studied hard for an afternoon, and finally I wrote an executable code, haha...... After execution, it can randomly rename, but the result is always: The syntax of the command is incorrect. Don't know how to do it. Thank you to everyone who has helped me, and wish you all a happy new year! ```

Floor7　namejm	Posted 2007-02-05 11:18
荣誉版主　Posts 1,737　Credits 5,226　From 成都
The following code can rename the txt files in the current directory to filenames between 1 and 32767, and no longer process the files that have been renamed. You can give it a try: @echo off for /f "delims=" %%i in ('dir /a-d /b .txt^\|findstr /v "^\.txt$"') do call :ren_ "%%i" pause exit :ren_ ren %1 %random%.txt 2>nul\|\|goto ren_ goto :eof

Floor8　anqing	Posted 2007-02-05 11:39
高级用户　Posts 413　Credits 859
The new usage and format of `findstr /v "^[0-9]*\.txt$"` are learned

Floor9　bsw	Posted 2007-05-10 15:32
新手上路　Posts 8　Credits 16

Floor10　zhoushijay	Posted 2007-05-10 15:57
高级用户　Posts 375　Credits 845
Named with date and time