批处理文件/脚本删除目录中的每3个文件

I have a folder with sequentially named images (a0001, a0002, a0003, etc.) and I was wondering if there was a way to delete every 3 files without touching the others.

我有一个带有顺序命名图像的文件夹(a0001,a0002,a0003等),我想知道是否有办法删除每3个文件而不触及其他文件。

So for example, I have: a0001, a0002, a0003, a0004, a0005 a0006, a0007, a0008, a0009

例如,我有:a0001,a0002,a0003,a0004,a0005 a0006,a0007,a0008,a0009

And after I would like to have: a0001, a0005, a0009

之后我想拥有:a0001,a0005,a0009

3 个解决方案

#1

I'm not sure about the syntax, as I usualy don't write batch scripts, but should be something like:

我不确定语法,因为我通常不编写批处理脚本,但应该是这样的:

set z = 0
for /f %%a IN (‘dir /b *’) do {
  set z = z + 1;
  if (z % 3 == 0) del %%a
}

#2

Here's a vbscript you can use

这是你可以使用的vbscript

strFolder = WScript.Arguments(0)
Set objFS = CreateObject( "Scripting.FileSystemObject" )
Set objFolder = objFS.GetFolder(strFolder)
i=0
For Each strFile In objFolder.Files
    If i Mod 4 <> 0 Then
        WScript.Echo strFile.Name
        objFS.DeleteFile(strFile.Name)
    End If
    i=i+1
Next

usage:

C:\test> cscript //nologo test.vbs c:\folder_to_process

#3

Here's a solution. This allows you to specify what to delete (eg c:\temp\*.tmp) how many files to skip (the default being 3 as you requested) and what order to use (the default being n - filename). You can use any DIR ordering eg N (name) or ES (extension then size), see dir /? to learn more about ordering. You shouldn't start the order command with /o (unlike dir) - it's auto-prepended.

这是一个解决方案。这允许您指定要删除的内容(例如c:\ temp \ * .tmp)要跳过的文件数(默认为您请求的3)以及使用的顺序(默认为n - 文件名)。您可以使用任何DIR订购,例如N(名称)或ES(扩展然后大小),请参阅dir /?了解有关订购的更多信息。你不应该用/ o启动命令命令(与dir不同) - 它是自动预先添加的。

Source: ndel.bat

@echo off
::: ndel - Deletes every nth file matching the spec
::: syntax: ndel.bat FILESPEC [skipcount] [sortorder]
:::           FILESPEC  - Files to be searched through
:::           skipcount - number of files to skip (optional - default 3)
:::           sortorder - File order (see: DIR for options - default N (name))

:: With no arguments show the above usage text
if "%~1"=="" findstr "^:::" "%~f0"&GOTO:EOF
set find=%1
set evry=4
set ord=n
if "%~2" neq "" set /a evry=(%2+1)
if "%~3" neq "" set ord=%3

set count=0
for /f %%f IN ('dir %find% /b /o%%ord%%') do (
    call :test_file "%%f"
)
GOTO:eof

:test_file
set /a _r="%count% %% %evry%"
if %_r%==0 echo %1
::-to delete- if %_r%==0 del %1
set /a count+=1
GOTO:eof

Notes:

You need to comment out if %_r%==0 echo %1 and remove the starting comment ::-to delete- to actually preform the delete (once you're happy it works :)).

您需要注释掉%_r%== 0 echo%1并删除起始注释:: - 删除 - 以实际执行删除(一旦您满意它工作:))。

The first few lines just output usage if you type in ndel (without a parameter)

如果输入ndel(没有参数),前几行只输出用法

Skip three is the same as saying delete every fourth file, which is why evry takes skip+1, and by default is set to 4 (skip 3).

跳过三与删除每四个文件相同,这就是为什么evry采用跳过+ 1,默认设置为4(跳过3)。

filespec can include a folder and complicated wild-card matches (just like dir).

filespec可以包含一个文件夹和复杂的通配符匹配(就像dir一样)。

A subroutine has to be used to count properly through the for (Environment variables within a FOR loop are expanded at the beginning of the loop and won't change until after the end of the DO section)

必须使用子程序通过for正确计数(FOR循环中的环境变量在循环开始时展开,直到DO部分结束后才会改变)

Calling ndel c:\temp\*.tmp 0 is the same as del c:\temp\*.tmp (since skip 0 = all)

调用ndel c:\ temp \ * .tmp 0与del c:\ temp \ * .tmp相同(因为skip 0 = all)

#1