FORFILES命令删除12小时.bat文件旧文件 [英] Forfiles command to delete 12 hours old files in .bat file

问题描述

我知道命令删除它们olders接天的文件。
如何使用删除12小时旧文件FORFILES命令

I know the command to delete the files which are olders then days. How to delete 12 hours old files using forfiles command

我在.bat文件中使用forfile命令

I am using forfile command in .bat file

推荐答案

好吧，我也为你努力工作......

Ok, I did hard work for you...

SETLOCAL ENABLEDELAYEDEXPANSION
REM 1: Parse date time string
FOR /F "TOKENS=1-5 DELIMS=/-:,. " %%i IN ("%DATE% %TIME%") DO (
    SET year=%%k
    SET month=%%j
    SET day=%%i
    SET hour=%%l
    SET minute=%%m
)
REM 2: Subtract 12 hours, handling day wrap including leap year.
SET /A hour-=12
IF %hour% LSS 0 SET /A hour+=24 & SET /A day-=1
IF %day% LSS 1 (
   SET /A month-=1
   IF !month! LSS 1 SET /A month+=12 & SET /A year-=1
   FOR %%m IN (1 3 5 7 8 10 12) DO IF %%m == !month! SET /A day+=31
   FOR %%m IN (4 6 9 11) DO IF %%m == !month! SET /A day+=30
   IF !month! == 2 (
    SET /A day+=28
    SET /A y4=!year! %% 4
        IF !y4! == 0 (
        SET /A y400=!year! %% 400
        IF !y400! == 0 (
            SET /A day+=1
        ) ELSE (
            SET /A y100=!year! %% 100
            IF NOT !y100! == 0 SET /A day+=1
        )
    )
    )
)
REM 3: Normalize string for later string comparison
CALL :norm_datetime "%day%-%month%-%year% %hour%:%minute%" limit_datetime
REM 4: List file, parse file sate time and delete on comparison verified.
FOR %%f IN (*.*) DO (
    CALL :norm_datetime "%%~tf" file_datetime
    IF !file_datetime! LSS %limit_datetime% ECHO DEL %%f
)
ENDLOCAL
GOTO :EOF

REM 4: function to normalize date time string
REM norm_datetime "time string" output_environment_variable
REM time string format must be d-m-y-h-m[-...], where - is any valid separator.
REM output will be YYYYMMDDTHHMM
:norm_datetime
FOR /F "TOKENS=1-5 DELIMS=/-:,. " %%i IN ("%~1") DO (
    SET year=0000%%k
    SET month=00%%j
    SET day=00%%i
    SET hour=00%%l
    SET minute=00%%m
)
SET %2=%year:~-4%%month:~-2%%day:~-2%T%hour:~-2%%minute:~-2%
GOTO :EOF

检查预期的日期和时间格式在code的言论。

Check expected date and time formats in code remarks.

请注意，日期和时间格式取决于系统，所以这code必须是适用于不同的系统。

Note that date and time format are system dependent, so this code must be adapted for different systems.

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