4

我想在我的目录中保留 5 个最后生成的文件,只保留每个日期的第一个文件,因为在我的子文件夹中,我在同一天多次生成了文件。

我有多个文件夹,其子文件夹名为“old”

C:\test\folder1\old
C:\test\toto\old
...

因此,例如在我的子文件夹中,我有这个:

   Mode                LastWriteTime     Length Name                                                                                                                                                                                                                                                   
----                -------------     ------ ----                                                                                                                                                                                                                                                   

-a---        07/06/2013     12:01  231248950 geofi.ry.7.0.0.159940.zip                                                                                                                                                                                                                             
-a---        07/06/2013     12:33  231248506 geofi.ry.7.0.0.159950.zip                                                                                                                                                                                                                             
-a---        07/06/2013     14:51  231248957 geofi.ry.7.0.0.159962.zip                                                                                                                                                                                                                             
-a---        17/06/2013     19:47  231248860 geofi.ry.7.0.0.160871.zip                                                                                                                                                                                                                             
-a---        18/06/2013     11:03  231248480 geofi.ry.7.0.0.160907.zip
-a---        23/06/2013     07:30  231250266 geofi.ry.7.0.0.161571.zip                                                                                                                                                                                                                                   
-a---        23/06/2013     21:30  231250266 geofi.ry.7.0.0.161563.zip                                                                                                                                                                                                                             
-a---        04/07/2013     00:42  231249910 geofi.ry.7.0.0.162695.zip
-a---        04/07/2013     16:12  231249910 geofi.ry.7.0.0.162647.zip                                                                                                                                                                                                                                  
-a---        08/07/2013     16:10  231250481 geofi.ry.7.0.0.163046.zip                                                                                                                                                                                                                             
-a---        10/07/2013     08:40  231250476 geofi.ry.7.0.0.163378.zip                                                                                                                                                                                                                                                                                                                                                                                                                                                          
-a---        17/07/2013     10:22  231249418 geofi.ry.7.0.0.164001.zip                                                                                                                                                                                                                             

我想保留这些文件:

-a---        17/07/2013     10:22  231249418 geofi.ry.7.0.0.164001.zip
-a---        10/07/2013     08:40  231250476 geofi.ry.7.0.0.163378.zip   
-a---        08/07/2013     16:10  231250481 geofi.ry.7.0.0.163046.zip    
-a---        04/07/2013     00:42  231249910 geofi.ry.7.0.0.162695.zip (on this date i have two files, I want to keep the first generated at this date 00:42).
-a---        23/06/2013     07:30  231250266 geofi.ry.7.0.0.161571.zip (on this date i have two files, I want to keep the first generated at this date 07:30).

这是草稿,但我卡住了,我该如何比较时间?

$Days = "5"

$TargetFolder = "C:\test\"

$Extension = "*.zip"

 $Files = Get-Childitem $TargetFolder -Include $Extension -Recurse | sort-object {$_.LastWriteTime} -Descending | ? { $_.fullname -match "old" } | select-object -First 1

 $most_recent_date = $files.LastWriteTime

 $LastWrite = $most_recent_date.Add(-$Days)

 $Files2 = Get-Childitem $TargetFolder -Include $Extension -Recurse | Where {$_.LastWriteTime -le "$LastWrite"}  | ? { $_.fullname -match "old" }


 foreach ($File in $Files2) 
    {
    if ($File -ne $NULL)
        {
        Remove-Item $File.FullName | out-null
        }
    else
        {
        Write-Host "No more files to delete!"
        }
    }

谢谢

4

4 回答 4

3

这项工作也可以在具有内置关联数组的旧批次的帮助下完成:

@ECHO OFF &SETLOCAL ENABLEDELAYEDEXPANSION
FOR /f "delims=" %%a IN ('dir /a-d /b *.zip') DO (
    FOR /f "tokens=2-4delims=/ " %%b  IN ("%%a") DO SET "filedate=%%d%%c%%b"
    FOR /f "tokens=3" %%b IN ("%%a") DO SET "filetime=%%b"
    SET "$!filedate!$!filetime!=%%a"
)
FOR /f "delims=$" %%a IN ('set "$"') DO (
    IF NOT "%%a"=="!files!" (
        SET "file="
        FOR /f "tokens=2*delims=$=" %%b IN ('set "$%%a"') DO IF NOT DEFINED file SET "file=%%c"
        SET "#%%a=!file!"
        SET "files=%%a"
        SET /a filecount+=1
    )
)
SET /a filecount-=5
FOR /f "skip=%filecount%tokens=2delims==" %%a IN ('set "#"') DO ECHO %%a

会话协议:

>目录 /ad *.zip
-a--- 07/06/2013 12:01 231248950 geofi.ry.7.0.0.159940.zip
-a--- 07/06/2013 12:33 231248506 geofi.ry.7.0.0.159950.zip
-a--- 07/06/2013 14:51 231248957 geofi.ry.7.0.0.159962.zip
-a--- 17/06/2013 19:47 231248860 geofi.ry.7.0.0.160871.zip
-a--- 18/06/2013 11:03 231248480 geofi.ry.7.0.0.160907.zip
-a--- 23/06/2013 07:30 231250266 geofi.ry.7.0.0.161571.zip
-a--- 23/06/2013 21:30 231250266 geofi.ry.7.0.0.161563.zip
-a--- 04/07/2013 00:42 231249910 geofi.ry.7.0.0.162695.zip
-a--- 04/07/2013 16:12 231249910 geofi.ry.7.0.0.162647.zip
-a--- 08/07/2013 16:10 231250481 geofi.ry.7.0.0.163046.zip
-a--- 10/07/2013 08:40 231250476 geofi.ry.7.0.0.163378.zip
-a--- 17/07/2013 10:22 231249418 geofi.ry.7.0.0.164001.zip

>脚本.bat
-a--- 23/06/2013 07:30 231250266 geofi.ry.7.0.0.161571.zip
-a--- 04/07/2013 00:42 231249910 geofi.ry.7.0.0.162695.zip
-a--- 08/07/2013 16:10 231250481 geofi.ry.7.0.0.163046.zip
-a--- 10/07/2013 08:40 231250476 geofi.ry.7.0.0.163378.zip
-a--- 17/07/2013 10:22 231249418 geofi.ry.7.0.0.164001.zip

于 2013-08-01T23:33:18.493 回答
2

如果您想在所有文件夹中保留 5 个最近日期的最新文件,请尝试以下操作:

$TargetFolder = 'C:\test'
$Extension    = '*.zip'

$files = gci $TargetFolder -Include $Extension -Recurse |
    ? { -not $_.PSIsContainer -and $_.Directory.Name -eq 'old' }
$keep = $files | sort LastWriteTime -Desc | group {$_.LastWriteTime.Date} |
    % {$_.Group[-1].FullName} | select -First 5
$totalSize = ($files | ? { $keep -notcontains $_.FullName } |
    Measure-Object -Sum Length).Sum
$files | ? { $keep -notcontains $_.FullName } | Remove-Item -WhatIf

"Deleted size: {0:N3}" -f ($totalSize / 1GB)

如果您想保留每个文件夹中 5 个最近日期的最新文件,请尝试以下操作:

$TargetFolder = 'C:\test'
$Extension    = '.zip'
$totalSize    = 0

gci $TargetFolder -Recurse | ? { $_.PSIsContainer -and $_.Name -eq 'old' } | % {
  $files = gci $_.FullName | ? { -not $_.PSIsContainer -and
      $_.Extension -eq $Extension }
  $keep = $files | sort LastWriteTime -Desc | group {$_.LastWriteTime.Date} |
      % {$_.Group[-1].FullName} | select -First 5
  $totalSize += ($files | ? { $keep -notcontains $_.FullName } |
      Measure-Object -Sum Length).Sum
  $files | ? { $keep -notcontains $_.FullName } | Remove-Item -WhatIf
}

"Deleted size: {0:N3}" -f ($totalSize / 1GB)

在您仔细检查代码是否确实符合您的要求后,删除-WhatIf-switch并重新运行代码。Remove-Item

于 2013-07-24T11:26:37.367 回答
1

我从您的问题中假设您只想在所有子文件夹中保留 5 个文件,如果是这样,下面的代码将满足您的需求。如果您想为每个子文件夹保留 5 个文件,那么您将首先创建这些文件夹的外循环,然后为每个单独的文件夹运行下面的代码。

$TargetFolder = "C:\test\"

$AllFiles = Get-Childitem $TargetFolder -Filter *.zip -Recurse | 
  ? { $_.fullname -match "old" -and -not $_.PSIsContainer  }

$KeepFiles = $AllFiles | 
  Sort-Object LastWriteTime | 
  Group-Object {$_.LastWriteTime.Date} | 
  % {$_.Group[0]} | 
  Sort-Object LastWriteTime -Descending |
  Select-Object -First 5

Compare-Object -ReferenceObject $AllFiles -DifferenceObject $KeepFiles -PassThru |
  Remove-Item
于 2013-07-24T10:48:08.087 回答
1

这一行呢?

Get-Childitem $TargetFolder -Include $Extension -Recurse |Sort-Object lastwritetime -Descending | Group-Object @{Expression={($_.lastwritetime).Date}} | % {$_.group | Select-Object -Last 1}

1)获取所有文件,在这里您可以添加您想要的过滤器。

2) 按 lastwritetime 降序对结果进行排序。

3)按日期对结果进行分组,因此我为每个日期分组。

4) 获取每个日期组中的最后一个元素。


我忘了| 选择对象-前 5

Get-Childitem $TargetFolder -Include $Extension -Recurse |Sort-Object lastwritetime -Descending | Group-Object @{Expression={($_.lastwritetime).Date}} | % {$_.group | Select-Object -Last 1} | Select-Object -First 5

这仅适用于一个目录试试这个:

Get-ChildItem $TargetFolder -Recurse | where {$_.psiscontainer} | % { Get-ChildItem -Path $_.fullname -filter $Extension |Sort-Object lastwritetime -Descending | Group-Object @{Expression={($_.lastwritetime).Date}} | % {$_.group | Select-Object -Last 1} | Select-Object -First 5}
于 2013-07-30T09:13:59.310 回答