@echo off title Made by www.yongfa365.com::设置当前日期前多少天或后多少天
set/a beforedays=-3
::设置目录所在位置
set   dir="F:\log\"
::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
set okstr=ex%lastdate:~2,6%.log
::删除这些文件
del del /f /s /q %dir%\%okstr%


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

'IIS日志清理VBS版代码(DelIISLog.vbs)  Made by www.yongfa365.com
'调用方法：DelIISLog "IIS日志所在路径",保留多少天的IIS日志

'遍历IIS日志文件夹下的所有文件及子文件夹下的文件
Function DelIISLog(IISLogPath,KeepDays)
on error resume next
    Set oFso = CreateObject("Scripting.FileSystemObject")
    Set oFolder = oFso.GetFolder(IISLogPath)
    Set oSubFolders = oFolder.SubFolders  '得到该目录下所有的文件夹的集合
    Set oFiles = oFolder.Files '得到该目录下所有的文件的集合
    '第一步处理当前目录下的所有文件
    For Each oFile In oFiles '遍历所有文件
        if right(oFile.name,3)="log" then
            oDate=cdate("20" & mid(oFile.name,3,2) & "-" & mid(oFile.name,5,2) & "-" & mid(oFile.name,7,2))
            if date-oDate > KeepDays then oFile.delete '判断是不是要处理的IIS日志文件，如果是的话直接删除
        end if
    Next
    '第二步处理当前目录下的所有目录，进行递归调用
    For Each oSubFolder In oSubFolders
        DelIISLog oSubFolder.Path,KeepDays '递归
    Next

End Function

DelIISLog "D:\IISLogTest",20 '遍历

//IIS日志清理JS版代码(DelIISLog.js)  Made by www.yongfa365.com
//调用方法：DelIISLog("IIS日志所在路径",保留多少天的IIS日志);

//遍历IIS日志文件夹下的所有文件及子文件夹下的文件
function DelIISLog(IISLogPath,KeepDays){
    var fso = new ActiveXObject("Scripting.FileSystemObject");
    var f = fso.GetFolder(IISLogPath);
    var Folders = new Enumerator(f.SubFolders); //得到该目录下所有的文件夹的集合
    var Files = new Enumerator(f.Files); //得到该目录下所有的文件的集合
    //第一步处理当前目录下的所有文件
    for (; !Files.atEnd(); Files.moveNext()) {
        var fileName = Files.item().name;
        var year = "20" + fileName.substr(2, 2);
        var mouth = fileName.substr(4, 2);
        var day = fileName.substr(6, 2);
        var days = Math.round(((new Date()).getTime() - Date.UTC(year, mouth - 1, day)) / 1000 / 60 / 60 / 24);
        if (days > KeepDays) Files.item().Delete(); //判断是不是要处理的IIS日志文件，如果是的话直接删除
    }
    //第二步处理当前目录下的所有目录，进行递归调用
    for (; !Folders.atEnd(); Folders.moveNext()) {
        DelIISLog(Folders.item(),KeepDays);
    }
}
//调用函数，比如："F:\\log",5  或 "C:\\windows\\system32\\LogFiles",5
DelIISLog("D:\\IISLogTest",2);

<job id="IIS日志清理WSH版代码(DelIISLog.wsf) Made by www.yongfa365.com">
    <script language="vbscript">
        '作者：柳永法(yongfa365)'Blog
        '修改：2007-11-15
        '操作说明：此文件只能清除一天的日志，得使用计划任务让其每天执行一次，因为服务器上一般都禁用WScript.Shell,所以不推荐使用
        Function DelIISLog(IISLogPath,beforedays)
            d=Now-beforedays
            If Right(IISLogPath,1) <> "\" Then IISLogPath=IISLogPath & "\"
            p= IISLogPath & "ex" & Right(Year(d),2) & Right("0" & Month(d),2)  & Right("0" & Day(d),2)  & ".Log"
            Set WshShell = WScript.CreateObject("WScript.Shell")
            wscript.echo p
            WshShell.Run ("cmd.exe /c del /s " & p)
            Set WshShell = Nothing
        End Function

        DelIISLog "D:\IISLogTest",2
    </script>
</job>

'IIS日志清理之IIS日志生成系统(CreateIISLog.vbs)  Made by www.yongfa365.com
'创建文件夹
Function CreateFolder(Folder)
    On Error Resume Next
    Set FSO = CreateObject("Scripting.FileSystemObject")
    FSO.CreateFolder(Folder)
    If Err>0 Then
        Err.Clear
        CreateFolder = False
    Else
        CreateFolder = True
    End If
End Function
'创建文件
Function CreateFile(FileName, Content)
    On Error Resume Next
    Set FSO = CreateObject("Scripting.FileSystemObject")
    Set fd = FSO.CreateTextFile(FileName, True)
    fd.WriteLine Content
    If Err>0 Then
        Err.Clear
        CreateFile = False
    Else
        CreateFile = True
    End If
End Function


CreateFolder "D:\IISLogTest"