bat脚本得到前一天的日期的代码

::判断当前日期的前一天
::首先直接把天数减1天
::如果出来的是0天就把月减1天，天数是当月的最后一天。
::如果出来的是0月就把年减1年，月数是当年的最后一月。
@echo off
set yyyy=%date:~2,2%
set mm=%date:~5,2%
set dd=%date:~8,2%
set /a od=%dd%-1
if %od%==0 call :dd0
if %mm%==0 call :mm0
set yestaday=%yyyy%%mm%%od%
echo %yestaday%
pause
:dd0
set /a mm=%mm%-1
for %%a in (1 3 5 7 8 10 12)do set %%add=31
set /a pddd=%yyyy%*10/4
set pd2d=%pddd:~-1,1%
set 2dd=28
if %pd2d%==0 set 2dd=29
for %%b in (4 6 9 11)do set %%bdd=30
set od=%%mm%dd%
goto :eof
:mm0
set /a yyyy=%yyyy%-1
set mm=12 && set od=31
goto :eof

@echo off
rem 计算指定天数之前的日期
set daysago=1
rem 假设系统日期的格式为yyyy-mm-dd
call :datetodays %date:~0,4% %date:~5,2% %date:~8,2% passdays
set /a passdays-=%daysago%
call :daystodate %passdays% dstyear dstmonth dstday
set dstdate=%dstyear%-%dstmonth%-%dstday%
echo %daysago%天的日期是%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

@echo off
echo wscript.echo dateadd("d",-1,now())>x.vbs
for /f %%i in ('cscript /nologo x.vbs') do set d=%%i
del x.vbs
echo %d%
pause

echo off
echo wscript.echo dateadd("d",-1,now())>vbs.vbs
for /f %%a in ('cscript /nologo vbs.vbs') do del vbs.vbs&&set yyyymmdd=%%a
for /f "tokens=1,2,3* delims=-" %%i in ('echo %yyyymmdd%') do set yyyy=%%i&set mm=%%j&set dd=%%k
if %mm% lss 9 set mm=0%mm%
if %dd% lss 9 set dd=0%dd%
set yesterday=%yyyy%-%mm%-%dd%
echo 昨天是：%yesterday%
echo 请按任意键退出
pause>nul

@echo off
set "today=%date%"
set "year=%today:~0,4%"
set "month=%today:~5,2%"
set "day=%today:~8,2%"
set /a "day=day-1"
if %day%==0 (
    set /a "month=month-1"
    if %month%==0 (
        set /a "year=year-1"
        set "month=12"
    )
    if %month%==1 set "month=01"
    if %month%==2 set "month=02"
    if %month%==3 set "month=03"
    if %month%==4 set "month=04"
    if %month%==5 set "month=05"
    if %month%==6 set "month=06"
    if %month%==7 set "month=07"
    if %month%==8 set "month=08"
    if %month%==9 set "month=09"
    set /a "last_day=30+(month+month/8)%%2"
    set "day=%last_day%"
)
if %day%==1 set "day=01"
if %day%==2 set "day=02"
if %day%==3 set "day=03"
if %day%==4 set "day=04"
if %day%==5 set "day=05"
if %day%==6 set "day=06"
if %day%==7 set "day=07"
if %day%==8 set "day=08"
if %day%==9 set "day=09"
echo %year%-%month%-%day%
pause

@echo off
setlocal enabledelayedexpansion
set "timestamp=%date%"
set "year=%timestamp:~0,4%"
set "month=%timestamp:~5,2%"
set "day=%timestamp:~8,2%"
set /a "day=day-1"
if %day%==0 (
    set /a "month=month-1"
    if !month!==00 (
        set /a "year=year-1"
        set "month=12"
    )
    for %%m in (01 02 03 04 05 06 07 08 09 10 11 12) do (
        if !month!==%%m (
            if "!month!" lss 10 (
                set "month=0!month!"
            )
        )
    )
    set /a "last_day=30+(month+month/8)%%2"
    set "day=!last_day!"
)
for %%d in (01 02 03 04 05 06 07 08 09) do (
    if !day!==%%d (
        set "day=0!day!"
    )
)
echo %year%-%month%-%day%
pause