Windows CMD命令行进行日期计算及本件备份

@echo off
::设置当前日期前多少天或后多少天
set/a beforedays=-1
::当前日期转换为天数并进行计算
call :Date2Day %date:~0,10% days
set/a days=%days%%beforedays%
call :Day2Date %days% lastdate
::计算完毕,生成想要的字符组合
rem set day=%date:~0,3%.bak
rem set filedate=%date:~4,4%%date:~9,2%%date:~12,2%
set day=%date:~11,3%.bak
set filedate=%date:~0,4%%date:~5,2%%date:~8,2%
echo lastdate=%lastdate%,day=%day%,filedate=%filedate%
rem pause
net use z: /D
net use z: //10.41.20.220/custombk/ATZS/IEDS custombk /USER:custom
rem dir *%filedate%*
del z:/Log/%day%/* /Q
del z:/Data/%day%/* /Q
xcopy Log/*%lastdate%*
z:/Log/%day% /Y /I /F
xcopy *%filedate%*
z:/Data/%day% /Y /I /F
::cmd /k
:Date2Day
setlocal ENABLEEXTENSIONS
for /f "tokens=1-3 delims=/-, " %%a in ('echo/%1') do (
set yy=%%a & set mm=%%b & set dd=%%c
)
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 %2=%j%&goto :EOF
:Day2Date
setlocal ENABLEEXTENSIONS
set /a i=%1,a=i+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%%mm%%dd%&goto :EOF

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