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Dec 12

ASP编码函数大全(进制转换/编码转换) 不指定

tommyhu , 17:37 , ASP , Comments(0) , Trackbacks(0) , Reads(9148) , Via Original Large | Medium | Small

<%
1、'UTF转GB---将UTF8编码文字转换为GB编码文字
function UTF2GB(UTFStr)
for Dig=1 to len(UTFStr)
    '如果UTF8编码文字以%开头则进行转换
    if mid(UTFStr,Dig,1)="%" then
       'UTF8编码文字大于8则转换为汉字
      if len(UTFStr) >= Dig+8 then
         GBStr=GBStr & ConvChinese(mid(UTFStr,Dig,9))
         Dig=Dig+8
      else
        GBStr=GBStr & mid(UTFStr,Dig,1)
      end if
    else
       GBStr=GBStr & mid(UTFStr,Dig,1)
    end if
next
UTF2GB=GBStr
end function

'UTF8编码文字将转换为汉字
function ConvChinese(x)
     A=split(mid(x,2),"%")
     i=0
     j=0
    for i=0 to ubound(A)
       A(i)=c16to2(A(i))
    next
    for i=0 to ubound(A)-1
      DigS=instr(A(i),"0")
      Unicode=""
      for j=1 to DigS-1
        if j=1 then
          A(i)=right(A(i),len(A(i))-DigS)
          Unicode=Unicode & A(i)
        else
           i=i+1
           A(i)=right(A(i),len(A(i))-2)
           Unicode=Unicode & A(i)
        end if
      next

      if len(c2to16(Unicode))=4 then
         ConvChinese=ConvChinese & chrw(int("&H" & c2to16(Unicode)))
      else
         ConvChinese=ConvChinese & chr(int("&H" & c2to16(Unicode)))
      end if
    next
end function

'二进制代码转换为十六进制代码
function c2to16(x)
     i=1
     for i=1 to len(x) step 4
        c2to16=c2to16 & hex(c2to10(mid(x,i,4)))
     next
end function

'二进制代码转换为十进制代码
function c2to10(x)
     c2to10=0
     if x="0" then exit function
       i=0
     for i= 0 to len(x) -1
        if mid(x,len(x)-i,1)="1" then c2to10=c2to10+2^(i)
     next
end function

'十六进制代码转换为二进制代码
function c16to2(x)
      i=0
      for i=1 to len(trim(x))
        tempstr= c10to2(cint(int("&h" & mid(x,i,1))))
        do while len(tempstr)<4
           tempstr="0" & tempstr
        loop
        c16to2=c16to2 & tempstr
     next
end function

'十进制代码转换为二进制代码
function c10to2(x)
     mysign=sgn(x)
     x=abs(x)
     DigS=1
     do
        if x<2^DigS then
          exit do
        else
          DigS=DigS+1
        end if
     loop
     tempnum=x

     i=0
     for i=DigS to 1 step-1
        if tempnum>=2^(i-1) then
           tempnum=tempnum-2^(i-1)
           c10to2=c10to2 & "1"
        else
           c10to2=c10to2 & "0"
        end if
     next
     if mysign=-1 then c10to2="-" & c10to2
end function

2、'GB转UTF8--将GB编码文字转换为UTF8编码文字

Function toUTF8(szInput)
      Dim wch, uch, szRet
      Dim x
      Dim nAsc, nAsc2, nAsc3
      '如果输入参数为空,则退出函数
      If szInput = "" Then
          toUTF8 = szInput
          Exit Function
      End If
      '开始转换
       For x = 1 To Len(szInput)
          '利用mid函数分拆GB编码文字
          wch = Mid(szInput, x, 1)
          '利用ascW函数返回每一个GB编码文字的Unicode字符代码
          '注:asc函数返回的是ANSI 字符代码,注意区别
          nAsc = AscW(wch)
          If nAsc < 0 Then nAsc = nAsc + 65536
    
          If (nAsc And &HFF80) = 0 Then
              szRet = szRet & wch
          Else
              If (nAsc And &HF000) = 0 Then
                  uch = "%" & Hex(((nAsc \ 2 ^ 6)) Or &HC0) & Hex(nAsc And &H3F Or &H80)
                  szRet = szRet & uch
              Else
                 'GB编码文字的Unicode字符代码在0800 - FFFF之间采用三字节模版
                  uch = "%" & Hex((nAsc \ 2 ^ 12) Or &HE0) & "%" & _
                              Hex((nAsc \ 2 ^ 6) And &H3F Or &H80) & "%" & _
                              Hex(nAsc And &H3F Or &H80)
                  szRet = szRet & uch
              End If
          End If
      Next
        
      toUTF8 = szRet
End Function

3、'GB转unicode---将GB编码文字转换为unicode编码文字

function chinese2unicode(Str)
    dim i
    dim Str_one
    dim Str_unicode
    if(isnull(Str)) then
       exit function
    end if
    for i=1 to len(Str)
      Str_one=Mid(Str,i,1)
      Str_unicode=Str_unicode&chr(38)
      Str_unicode=Str_unicode&chr(35)
      Str_unicode=Str_unicode&chr(120)
      Str_unicode=Str_unicode& Hex(ascw(Str_one))
      Str_unicode=Str_unicode&chr(59)
    next
    chinese2unicode=Str_unicode
end function  

4、'URL解码
Function URLDecode(enStr)
dim deStr
dim c,i,v
deStr=""
for i=1 to len(enStr)
    c=Mid(enStr,i,1)
    if c="%" then
     v=eval("&h"+Mid(enStr,i+1,2))
     if v<128 then
      deStr=deStr&chr(v)
      i=i+2
     else
      if isvalidhex(mid(enstr,i,3)) then
       if isvalidhex(mid(enstr,i+3,3)) then
        v=eval("&h"+Mid(enStr,i+1,2)+Mid(enStr,i+4,2))
        deStr=deStr&chr(v)
        i=i+5
       else
        v=eval("&h"+Mid(enStr,i+1,2)+cstr(hex(asc(Mid(enStr,i+3,1)))))
        deStr=deStr&chr(v)
        i=i+3
       end if
      else
       destr=destr&c
      end if
     end if
    else
     if c="+" then
      deStr=deStr&" "
     else
      deStr=deStr&c
     end if
    end if
next
URLDecode=deStr
end function

'判断是否为有效的十六进制代码
function isvalidhex(str)
dim c
isvalidhex=true
str=ucase(str)
if len(str)<>3 then isvalidhex=false:exit function
if left(str,1)<>"%" then isvalidhex=false:exit function
    c=mid(str,2,1)
if not (((c>="0") and (c<="9")) or ((c>="A") and (c<="Z"))) then isvalidhex=false:exit function
    c=mid(str,3,1)
if not (((c>="0") and (c<="9")) or ((c>="A") and (c<="Z"))) then isvalidhex=false:exit function
end function
%>


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