vbs實(shí)現(xiàn)只復(fù)制比目標(biāo)文件更新的文件

    代碼如下:
    @echo off
    ::每5分鐘復(fù)制以下首頁(yè)
    for /f %%i in ('dir /b c:\index2.htm') do (
    set indexdx=%%~zi
    )
    if %indexdx% gtr 5120 (
    echo y | xcopy c:\index2.htm /d /r /k c:\index.htm
    )
    其中for /f %%i in ('dir /b c:\index2.htm') do (
    set indexdx=%%~zi
    )
    是bat中獲取index2.htm文件大小的。
    然后通過if %indexdx% gtr 5120 (
    實(shí)現(xiàn)判斷是不是大于5120個(gè)字節(jié)
    主要就是下面這個(gè)代碼了功能更強(qiáng)，也比較簡(jiǎn)單
    代碼如下:
    dim fso
    set fso = createobject(scripting.filesystemobject)
    set fn2=fso.getfile(c:\index2.htm)
    flsize2=fn2.size
    fldate2=fn2.datelastmodified
    set fn=fso.getfile(c:\index.htm)
    flsize1=fn.size
    fldate1=fn.datelastmodified
    if fso.fileexists(c:\index2.htm) and flsize2>50000 and fldate2>fldate1 then
    fso.getfile(c:\index2.htm).copy(c:\index.htm)
    if err.number=0 then writehistory 成功&now(),log.txt
    end if
    sub writehistory(hischars, path)
    const forreading = 1, forappending = 8
    dim fso, f
    set fso = createobject(scripting.filesystemobject)
    set f = fso.opentextfile(path, forappending, true)
    f.writeline hischars
    f.close
    end sub