批处理bat计算上个月最后一天的日期

【方案一】BAT + date.exe(GNU)

@echo off

rem 调用GNU for Win32的date.exe

set "gnuDate=C:/test/date.exe"

for /f %%a in ('%gnuDate% "+%%Y%%m01"') do (

    for /f %%h in ('%gnuDate% -d "%%a 1 days ago" "+%%Y-%%m-%%d"') do (

        set "DstDate=%%h"

    )

)

echo,%DstDate%

pause

【方案二】BAT + VBS

@echo off

>"%temp%/DateCalculate.vbs" echo strLastDate=DateAdd("d", -DatePart("d", Date), Date)

>>"%temp%/DateCalculate.vbs" echo strFmtDate=Right(Year(strLastDate),4) ^& Right("0" ^& Month(strLastDate),2) ^& Right("0" ^& Day(strLastDate),2)

>>"%temp%/DateCalculate.vbs" echo WScript.Echo strFmtDate

for /f %%a in ('cscript /nologo "%temp%/DateCalculate.vbs"') do (

    set "DstDate=%%a"

)

set DstDate=%DstDate:~0,4%-%DstDate:~4,2%-%DstDate:~6,2%

echo,%DstDate%

pause

【方案三】BAT

@echo off

setlocal enabledelayedexpansion

rem 假设系统日期格式为yyyy-mm-dd

set "y=%date:~0,4%"

set "m=%date:~5,2%"

set /a "m=1!m!-101, m=m+(^!m)*12"

rem 上月是否2月或小月

set /a "f=^!(m-2), s=^!(m-4)|^!(m-6)|^!(m-9)|^!(m-11)"

rem 今年是否闰年

set /a "leap=^!(y%%4) & ^!^!(y%%100) | ^!(y%%400)"

rem 上月有!d!天

set /a "d=f*(28+leap)+s*30+(^!f&^!s)*31"

set /a "y1=y-^!(m-12)"

set "m=0!m!"

set "m=!m:~-2!"

set "d=0!d!"

set "d=!d:~-2!"

set DstDate=!y1!-!m!-!d!

echo,%DstDate%

pause

【方案四】BAT + Ritchie Lawrence 日期函数

@echo off

rem 假设系统日期格式为yyyy-mm-dd

set ThisYear=%date:~0,4%

set ThisMonth=%date:~5,2%

call :DateToDays %ThisYear% %ThisMonth% 01 ThisDays

set /a DstDays=%ThisDays%-1

call :DaysToDate %DstDays% DstYear DstMonth DstDay

set DstDate=%DstYear%-%DstMonth%-%DstDay%

echo,%DstDate%

pause

goto :eof

:DateToDays %yy% %mm% %dd% days

setlocal ENABLEEXTENSIONS

set yy=%1&set mm=%2&set dd=%3

if 1%yy% LSS 200 if 1%yy% LSS 170 (set yy=20%yy%) else (set yy=19%yy%)

set /a dd=100%dd%%%100,mm=100%mm%%%100

set /a z=14-mm,z/=12,y=yy+4800-z,m=mm+12*z-3,j=153*m+2

set /a j=j/5+dd+y*365+y/4-y/100+y/400-2472633

endlocal&set %4=%j%&goto :EOF
:DaysToDate %days% yy mm dd

setlocal ENABLEEXTENSIONS

set /a a=%1+2472632,b=4*a+3,b/=146097,c=-b*146097,c/=4,c+=a

set /a d=4*c+3,d/=1461,e=-1461*d,e/=4,e+=c,m=5*e+2,m/=153,dd=153*m+2,dd/=5

set /a dd=-dd+e+1,mm=-m/10,mm*=12,mm+=m+3,yy=b*100+d-4800+m/10

(if %mm% LSS 10 set mm=0%mm%)&(if %dd% LSS 10 set dd=0%dd%)

endlocal&set %2=%yy%&set %3=%mm%&set %4=%dd%&goto :EOF

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