vbscript 字符编码转换-尊龙凯时

'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
'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   
'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