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The time now is 2026-08-12 01:16

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DOS批处理 & 脚本技术（批处理室） » Automatically determine whether the folder is empty. If it is an empty folder, delete it!

Floor1　eckert	Posted 2008-02-22 00:47
初级用户　Posts 14　Credits 41
Automatically determine whether a folder is empty. If it is an empty folder, delete it! for /l %%a in (1,1,3) do for/r %%i in (.) do rd %%~si Let me see if there are any errors. Can it be used in LJ file cleaning?

Floor2　lotus516	Posted 2008-02-23 00:53
高级用户　Posts 246　Credits 551
for /f "tokens=*" %%a in ('dir /b /ad /s "l:\"^\|sort /r" do rd "%%a" 2>nul

Floor3　cad55	Posted 2008-02-23 09:26
高级用户　Posts 329　Credits 620
Originally posted by lotus516 at 2008-2-23 12:53 AM: for /f "tokens=*" %%a in ('dir /b /ad /s "l:\"^\|sort /r') do rd "%%a" 2>nul Expert... Also, may I ask... How to search and delete all types of files with 0 bytes.

Floor4　zyz0304360	Posted 2008-02-23 11:33
中级用户　Posts 123　Credits 257　From 烟台
Indeed powerful Learned Salute All types of files with 0 bytes Use %%~z in FOR to expand the file size %%~zi=0 means 0 bytes i

Floor5　zyz0304360	Posted 2008-02-23 11:40
中级用户　Posts 123　Credits 257　From 烟台
What does "l:\" mean in the following? I don't understand here, can you give me some guidance? Thank you very much

Floor6　cad55	Posted 2008-02-23 12:16
高级用户　Posts 329　Credits 620
Originally posted by zyz0304360 at 2008-2-23 11:40 AM: May I ask In the line "for /f "tokens=*" %%a in ('dir /b /ad /s "l:\"^\|sort /r') do rd "%%a" 2>nul ", what does the part "l:\" mean? I don't understand this part here... Dizzy It's to delete the folders in the current drive letter....... The 0-byte one.. you can say it again..... I didn't understand it..........

Floor7　abcd	Posted 2008-02-23 13:01
银牌会员　Posts 739　Credits 1,436
It is to use the characteristics of the rd command. When deleting a 0-byte folder, it will not prompt an error.

Floor8　zyz0304360	Posted 2008-02-23 13:05
中级用户　Posts 123　Credits 257　From 烟台
@echo off for /f "tokens=" %%i in ('dir /b .* ^\|sort /r') do if %%~zi==0 del /f /q "%%~ni." pause [ Last edited by zyz0304360 on 2008-2-23 at 01:18 PM* ]

Floor9　zyz0304360	Posted 2008-02-23 13:26
中级用户　Posts 123　Credits 257　From 烟台
Originally posted by cad55 at 2008-2-23 12:16 PM: Wow It's to delete the current drive letter of the folder....... Which 0-byte.. you say again..... Didn't understand.......... It's to delete the current drive letter of the folder....... I execute dir /b /ad /s "\|:\" and it will report an error Cannot find the specified path ah For example, there is such a file C:aa\aa\aa How to delete the drive letter? Like this? C:aa\aa\aa \|:\ I'm a newbie, currently only understand this set a=C:aa\aa\aa set a=%a:\=% The above is not understood, please give guidance, thank you

Floor10　duansuo	Posted 2008-02-23 15:07
新手上路　Posts 2　Credits 4
Is there anyone who can explain it completely? I still don't quite understand. Thanks a lot!

Floor11　abcd	Posted 2008-02-23 16:50
银牌会员　Posts 739　Credits 1,436
Originally posted by zyz0304360 at 2008-2-23 01:26 PM: It is to delete the current drive letter of the folder....... I execute dir /b /ad /s "\|:\" and it will report an error Cannot find the specified path. For example, there is such a file C：aa\aa\aa How to delete the drive letter... Removing "\|:\" means the current drive letter. Replace "\|:\" with your own path.

Floor12　cad55	Posted 2008-02-23 17:04
高级用户　Posts 329　Credits 620
Originally posted by duansuo at 2008-2-23 03:07 PM: Is there anyone who can explain it completely? I still don't understand it very well. Thanks! For example: You want to delete empty folders under the C drive: for /f "tokens=" %%a in ('dir /b /ad /s "c:\"^\|sort /r') do rd "%%a" 2>nul You want to delete empty folders under the D drive: for /f "tokens=" %%a in ('dir /b /ad /s "d:\"^\|sort /r') do rd "%%a" 2>nul [ Last edited by cad55 on 2008-2-23 at 05:14 PM ]

Floor13　Nickey	Posted 2008-02-23 17:15
初级用户　Posts 59　Credits 132　From GuangZhou
Why does changing the for /f "tokens=" %%a in ('dir /b /ad /s "E:\"^\|sort /r') do rd "%%a" 2>nul to: for /f "tokens=" %%a in ('dir /b /ad /s "E:\"^\|sort /r') do echo "%%a">>空文件夹菜单.txt result in all folders being written to the notepad?

Floor14　abcd	Posted 2008-02-23 17:18
银牌会员　Posts 739　Credits 1,436
Originally posted by Nickey at 2008-2-23 05:15 PM: Why change the for /f "tokens=" %%a in ('dir /b /ad /s "E:\"^\|sort /r') do rd "%%a" 2>nul to: for /f "tokens=" %%a in ( ... 'dir /b /ad /s "E:\"^\|sort /r' will list all folders. As for why it only deletes empty folders and not non-empty ones it is because of the characteristic of the rd command. When deleting an empty folder, it does not prompt When the /Q parameter is not added, the rd command will prompt an error message when deleting a non-empty folder.

Floor15　zyz0304360	Posted 2008-02-23 18:06
中级用户　Posts 123　Credits 257　From 烟台
Originally posted by Nickey at 2008-2-23 05:15 PM: Why change the for /f "tokens=" %%a in ('dir /b /ad /s "E:\"^\|sort /r') do rd "%%a" 2>nul to: for /f "tokens=" %%a in ( ... 'dir /b /ad /s "E:\"^\|sort /r' This command is used to list all folder names (with /ad) under and in subdirectories (/s) of drive E: /ad specifies to print folder names Then assign the folder name to %%a 2>nul means to write the error commands when executing the rd "%%a" command to the null device (that is, no feedback is needed) Changing it to echo "%%a" >>aaa.txt Of course, it is to write the system feedback when deleting empty files to aaa.txt Because %%a is the folder name [ Last edited by zyz0304360 on 2008-2-23 at 06:07 PM ]

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