批量文件命令保留最小的目录并删除所有其他文件

Question

我的问题有点复杂。让我解释：

我有一个批处理文件，现在将创建4个文件夹 - 它们分别是：

1 
2 
3 
4 

每个4个文件夹都将在他们2个文件。我想要做的是创建一个批处理文件，将保留这4个文件夹中最小的文件夹并删除其他文件夹。因此，如果文件夹大小如下所示：

1 = 300,000 b 
2 = 325,000 b 
3 = 250,000 b 
4 = 350,000 b 

然后只保留文件夹3，应删除文件夹1,2和4。

这可以用批处理文件完成吗？任何帮助，将不胜感激。

谢谢。

Answer 1

将文件夹中的这个批处理文件包含4个数据文件夹，然后运行它：

@echo off 
setlocal EnableDelayedExpansion 

rem Get size of all folders 
set smallestSize=9999999999 
for /D %%a in (*) do (
    set size=0 
    for %%b in (%%a\*.*) do set /A size+=%%~Zb 
    if !size! lss !smallestSize! (
     set smallestSize=!size! 
     set smallestName=%%a 
    ) 
) 

echo Folder to keep: "%smallestName%" 
pause 

rem Delete all folders, excepting the smallest one 
for /D %%a in (*) do (
    if "%%a" neq "%smallestName%" rd /S /Q "%%a" 
) 

Answer 2

@echo off 
    setlocal enableextensions enabledelayedexpansion 

    rem Configure where to start 

    set "root=%cd%" 

    rem Initialize needed variables 

    set "minSize=99999999999999999999" 
    set "minFolder=" 
    set "size=" 
    set "folder=" 
    for %%a in ("%root%") do set "drive=%%~da" 

    rem Retrieve the full list and from it get only the lines that 
    rem contain the folder name and the file count/size 

    for /f "skip=2 delims=" %%z in (' 
     dir /-c /s /a-d "%root%\*" ^| findstr /r /c:"^ [ ]*[0-9]" /c:":\\.*" 
    ') do (

     rem Determine if the current line is a folder name, or folder statistics. 
     rem If we have already read a folder name, the next record should be the sizes 
     rem else we have a folder name or the final statistics for the dir command 

     if defined folder (

      rem Read the size and format as a zero prefixed string to avoid 2^31 limit 
      rem in batch files arithmetic. All the size tests will be a string test. 
      for /f "tokens=3" %%a in ("%%z") do set "size=00000000000000000000%%a" & set "size=!size:~-20!" 

     ) else ( 

      rem Read the folder name and reset the size for this folder. As the colon is used 
      rem to separate the folder name from the rest of the data in the line, the drive 
      rem letter and colon are removed. Append the initially retrieved one. 
      for /f "tokens=2 delims=:" %%a in ("%%z") do set "folder=%drive%%%a" 
      set "size=" 

     ) 

     rem When a size is available, a folder has also being retrieved. 
     rem As we have all the needed information, check if the current folder size 
     rem is less than the previous minimal folder and delete the previous or the 
     rem current one depending on its size 

     if defined size (

      if "!size!" lss "!minSize!" (

       rem Old folder is bigger, remove it and remember current folder info 
       if defined minFolder echo rd /s /q "!minFolder!" 
       set "minSize=!size!" 
       set "minFolder=!folder!" 

      ) else (

       rem Current folder is bigger, remove it 
       echo rd /s /q "!folder!" 
      ) 

      rem In any case, the current folder has been processed. Initialize variables 
      set "size=" 
      set "folder=" 
     ) 
    ) 

大量的代码，但我想只执行一个dir命令检索所有所需的信息。

根据您的需要更改root变量。而且，所有的rd命令都只能回显给控制台。如果输出正确，请删除前缀rd操作的echo命令。