asp中有关字符编码转换的几个函数
1<%
21、'UTF转GB---将UTF8编码文字转换为GB编码文字
3function UTF2GB(UTFStr)
4
5for Dig=1 to len(UTFStr)
6 '如果UTF8编码文字以%开头则进行转换
7 if mid(UTFStr,Dig,1)="%" then
8 'UTF8编码文字大于8则转换为汉字
9 if len(UTFStr) >= Dig+8 then
10 GBStr=GBStr & ConvChinese(mid(UTFStr,Dig,9))
11 Dig=Dig+8
12 else
13 GBStr=GBStr & mid(UTFStr,Dig,1)
14 end if
15 else
16 GBStr=GBStr & mid(UTFStr,Dig,1)
17 end if
18next
19UTF2GB=GBStr
20end function
21
22'UTF8编码文字将转换为汉字
23function ConvChinese(x)
24 A=split(mid(x,2),"%")
25 i=0
26 j=0
27 for i=0 to ubound(A)
28 A(i)=c16to2(A(i))
29 next
30 for i=0 to ubound(A)-1
31 DigS=instr(A(i),"0")
32 Unicode=""
33 for j=1 to DigS-1
34 if j=1 then
35 A(i)=right(A(i),len(A(i))-DigS)
36 Unicode=Unicode & A(i)
37 else
38 i=i+1
39 A(i)=right(A(i),len(A(i))-2)
40 Unicode=Unicode & A(i)
41 end if
42 next
43
44 if len(c2to16(Unicode))=4 then
45 ConvChinese=ConvChinese & chrw(int("&H" & c2to16(Unicode)))
46 else
47 ConvChinese=ConvChinese & chr(int("&H" & c2to16(Unicode)))
48 end if
49 next
50end function
51
52'二进制代码转换为十六进制代码
53function c2to16(x)
54 i=1
55 for i=1 to len(x) step 4
56 c2to16=c2to16 & hex(c2to10(mid(x,i,4)))
57 next
58end function
59
60'二进制代码转换为十进制代码
61function c2to10(x)
62 c2to10=0
63 if x="0" then exit function
64 i=0
65 for i= 0 to len(x) -1
66 if mid(x,len(x)-i,1)="1" then c2to10=c2to10+2^(i)
67 next
68end function
69
70'十六进制代码转换为二进制代码
71function c16to2(x)
72 i=0
73 for i=1 to len(trim(x))
74 tempstr= c10to2(cint(int("&h" & mid(x,i,1))))
75 do while len(tempstr)<4
76 tempstr="0" & tempstr
77 loop
78 c16to2=c16to2 & tempstr
79 next
80end function
81
82'十进制代码转换为二进制代码
83function c10to2(x)
84 mysign=sgn(x)
85 x=abs(x)
86 DigS=1
87 do
88 if x<2^DigS then
89 exit do
90 else
91 DigS=DigS+1
92 end if
93 loop
94 tempnum=x
95
96 i=0
97 for i=DigS to 1 step-1
98 if tempnum>=2^(i-1) then
99 tempnum=tempnum-2^(i-1)
100 c10to2=c10to2 & "1"
101 else
102 c10to2=c10to2 & "0"
103 end if
104 next
105 if mysign=-1 then c10to2="-" & c10to2
106end function
107
1082、'GB转UTF8--将GB编码文字转换为UTF8编码文字
109
110Function toUTF8(szInput)
111 Dim wch, uch, szRet
112 Dim x
113 Dim nAsc, nAsc2, nAsc3
114 '如果输入参数为空,则退出函数
115 If szInput = "" Then
116 toUTF8 = szInput
117 Exit Function
118 End If
119 '开始转换
120 For x = 1 To Len(szInput)
121 '利用mid函数分拆GB编码文字
122 wch = Mid(szInput, x, 1)
123 '利用ascW函数返回每一个GB编码文字的Unicode字符代码
124 '注:asc函数返回的是ANSI 字符代码,注意区别
125 nAsc = AscW(wch)
126 If nAsc < 0 Then nAsc = nAsc + 65536
127
128 If (nAsc And &HFF80) = 0 Then
129 szRet = szRet & wch
130 Else
131 If (nAsc And &HF000) = 0 Then
132 uch = "%" & Hex(((nAsc \ 2 ^ 6)) Or &HC0) & Hex(nAsc And &H3F Or &H80)
133 szRet = szRet & uch
134 Else
135 'GB编码文字的Unicode字符代码在0800 - FFFF之间采用三字节模版
136 uch = "%" & Hex((nAsc \ 2 ^ 12) Or &HE0) & "%" & _
137 Hex((nAsc \ 2 ^ 6) And &H3F Or &H80) & "%" & _
138 Hex(nAsc And &H3F Or &H80)
139 szRet = szRet & uch
140 End If
141 End If
142 Next
143
144 toUTF8 = szRet
145End Function
146
1473、'GB转unicode---将GB编码文字转换为unicode编码文字
148
149function chinese2unicode(Str)
150 dim i
151 dim Str_one
152 dim Str_unicode
153 if(isnull(Str)) then
154 exit function
155 end if
156 for i=1 to len(Str)
157 Str_one=Mid(Str,i,1)
158 Str_unicode=Str_unicode&chr(38)
159 Str_unicode=Str_unicode&chr(35)
160 Str_unicode=Str_unicode&chr(120)
161 Str_unicode=Str_unicode& Hex(ascw(Str_one))
162 Str_unicode=Str_unicode&chr(59)
163 next
164 chinese2unicode=Str_unicode
165end function
166
1674、'URL解码
168Function URLDecode(enStr)
169dim deStr
170dim c,i,v
171deStr=""
172for i=1 to len(enStr)
173 c=Mid(enStr,i,1)
174 if c="%" then
175 v=eval("&h"+Mid(enStr,i+1,2))
176 if v<128 then
177 deStr=deStr&chr(v)
178 i=i+2
179 else
180 if isvalidhex(mid(enstr,i,3)) then
181 if isvalidhex(mid(enstr,i+3,3)) then
182 v=eval("&h"+Mid(enStr,i+1,2)+Mid(enStr,i+4,2))
183 deStr=deStr&chr(v)
184 i=i+5
185 else
186 v=eval("&h"+Mid(enStr,i+1,2)+cstr(hex(asc(Mid(enStr,i+3,1)))))
187 deStr=deStr&chr(v)
188 i=i+3
189 end if
190 else
191 destr=destr&c
192 end if
193 end if
194 else
195 if c="+" then
196 deStr=deStr&" "
197 else
198 deStr=deStr&c
199 end if
200 end if
201next
202URLDecode=deStr
203end function
204
205'判断是否为有效的十六进制代码
206function isvalidhex(str)
207dim c
208isvalidhex=true
209str=ucase(str)
210if len(str)<>3 then isvalidhex=false:exit function
211if left(str,1)<>"%" then isvalidhex=false:exit function
212 c=mid(str,2,1)
213if not (((c>="0") and (c<="9")) or ((c>="A") and (c<="Z"))) then isvalidhex=false:exit function
214 c=mid(str,3,1)
215if not (((c>="0") and (c<="9")) or ((c>="A") and (c<="Z"))) then isvalidhex=false:exit function
216end function
217%>
218
21、'UTF转GB---将UTF8编码文字转换为GB编码文字
3function UTF2GB(UTFStr)
4
5for Dig=1 to len(UTFStr)
6 '如果UTF8编码文字以%开头则进行转换
7 if mid(UTFStr,Dig,1)="%" then
8 'UTF8编码文字大于8则转换为汉字
9 if len(UTFStr) >= Dig+8 then
10 GBStr=GBStr & ConvChinese(mid(UTFStr,Dig,9))
11 Dig=Dig+8
12 else
13 GBStr=GBStr & mid(UTFStr,Dig,1)
14 end if
15 else
16 GBStr=GBStr & mid(UTFStr,Dig,1)
17 end if
18next
19UTF2GB=GBStr
20end function
21
22'UTF8编码文字将转换为汉字
23function ConvChinese(x)
24 A=split(mid(x,2),"%")
25 i=0
26 j=0
27 for i=0 to ubound(A)
28 A(i)=c16to2(A(i))
29 next
30 for i=0 to ubound(A)-1
31 DigS=instr(A(i),"0")
32 Unicode=""
33 for j=1 to DigS-1
34 if j=1 then
35 A(i)=right(A(i),len(A(i))-DigS)
36 Unicode=Unicode & A(i)
37 else
38 i=i+1
39 A(i)=right(A(i),len(A(i))-2)
40 Unicode=Unicode & A(i)
41 end if
42 next
43
44 if len(c2to16(Unicode))=4 then
45 ConvChinese=ConvChinese & chrw(int("&H" & c2to16(Unicode)))
46 else
47 ConvChinese=ConvChinese & chr(int("&H" & c2to16(Unicode)))
48 end if
49 next
50end function
51
52'二进制代码转换为十六进制代码
53function c2to16(x)
54 i=1
55 for i=1 to len(x) step 4
56 c2to16=c2to16 & hex(c2to10(mid(x,i,4)))
57 next
58end function
59
60'二进制代码转换为十进制代码
61function c2to10(x)
62 c2to10=0
63 if x="0" then exit function
64 i=0
65 for i= 0 to len(x) -1
66 if mid(x,len(x)-i,1)="1" then c2to10=c2to10+2^(i)
67 next
68end function
69
70'十六进制代码转换为二进制代码
71function c16to2(x)
72 i=0
73 for i=1 to len(trim(x))
74 tempstr= c10to2(cint(int("&h" & mid(x,i,1))))
75 do while len(tempstr)<4
76 tempstr="0" & tempstr
77 loop
78 c16to2=c16to2 & tempstr
79 next
80end function
81
82'十进制代码转换为二进制代码
83function c10to2(x)
84 mysign=sgn(x)
85 x=abs(x)
86 DigS=1
87 do
88 if x<2^DigS then
89 exit do
90 else
91 DigS=DigS+1
92 end if
93 loop
94 tempnum=x
95
96 i=0
97 for i=DigS to 1 step-1
98 if tempnum>=2^(i-1) then
99 tempnum=tempnum-2^(i-1)
100 c10to2=c10to2 & "1"
101 else
102 c10to2=c10to2 & "0"
103 end if
104 next
105 if mysign=-1 then c10to2="-" & c10to2
106end function
107
1082、'GB转UTF8--将GB编码文字转换为UTF8编码文字
109
110Function toUTF8(szInput)
111 Dim wch, uch, szRet
112 Dim x
113 Dim nAsc, nAsc2, nAsc3
114 '如果输入参数为空,则退出函数
115 If szInput = "" Then
116 toUTF8 = szInput
117 Exit Function
118 End If
119 '开始转换
120 For x = 1 To Len(szInput)
121 '利用mid函数分拆GB编码文字
122 wch = Mid(szInput, x, 1)
123 '利用ascW函数返回每一个GB编码文字的Unicode字符代码
124 '注:asc函数返回的是ANSI 字符代码,注意区别
125 nAsc = AscW(wch)
126 If nAsc < 0 Then nAsc = nAsc + 65536
127
128 If (nAsc And &HFF80) = 0 Then
129 szRet = szRet & wch
130 Else
131 If (nAsc And &HF000) = 0 Then
132 uch = "%" & Hex(((nAsc \ 2 ^ 6)) Or &HC0) & Hex(nAsc And &H3F Or &H80)
133 szRet = szRet & uch
134 Else
135 'GB编码文字的Unicode字符代码在0800 - FFFF之间采用三字节模版
136 uch = "%" & Hex((nAsc \ 2 ^ 12) Or &HE0) & "%" & _
137 Hex((nAsc \ 2 ^ 6) And &H3F Or &H80) & "%" & _
138 Hex(nAsc And &H3F Or &H80)
139 szRet = szRet & uch
140 End If
141 End If
142 Next
143
144 toUTF8 = szRet
145End Function
146
1473、'GB转unicode---将GB编码文字转换为unicode编码文字
148
149function chinese2unicode(Str)
150 dim i
151 dim Str_one
152 dim Str_unicode
153 if(isnull(Str)) then
154 exit function
155 end if
156 for i=1 to len(Str)
157 Str_one=Mid(Str,i,1)
158 Str_unicode=Str_unicode&chr(38)
159 Str_unicode=Str_unicode&chr(35)
160 Str_unicode=Str_unicode&chr(120)
161 Str_unicode=Str_unicode& Hex(ascw(Str_one))
162 Str_unicode=Str_unicode&chr(59)
163 next
164 chinese2unicode=Str_unicode
165end function
166
1674、'URL解码
168Function URLDecode(enStr)
169dim deStr
170dim c,i,v
171deStr=""
172for i=1 to len(enStr)
173 c=Mid(enStr,i,1)
174 if c="%" then
175 v=eval("&h"+Mid(enStr,i+1,2))
176 if v<128 then
177 deStr=deStr&chr(v)
178 i=i+2
179 else
180 if isvalidhex(mid(enstr,i,3)) then
181 if isvalidhex(mid(enstr,i+3,3)) then
182 v=eval("&h"+Mid(enStr,i+1,2)+Mid(enStr,i+4,2))
183 deStr=deStr&chr(v)
184 i=i+5
185 else
186 v=eval("&h"+Mid(enStr,i+1,2)+cstr(hex(asc(Mid(enStr,i+3,1)))))
187 deStr=deStr&chr(v)
188 i=i+3
189 end if
190 else
191 destr=destr&c
192 end if
193 end if
194 else
195 if c="+" then
196 deStr=deStr&" "
197 else
198 deStr=deStr&c
199 end if
200 end if
201next
202URLDecode=deStr
203end function
204
205'判断是否为有效的十六进制代码
206function isvalidhex(str)
207dim c
208isvalidhex=true
209str=ucase(str)
210if len(str)<>3 then isvalidhex=false:exit function
211if left(str,1)<>"%" then isvalidhex=false:exit function
212 c=mid(str,2,1)
213if not (((c>="0") and (c<="9")) or ((c>="A") and (c<="Z"))) then isvalidhex=false:exit function
214 c=mid(str,3,1)
215if not (((c>="0") and (c<="9")) or ((c>="A") and (c<="Z"))) then isvalidhex=false:exit function
216end function
217%>
218
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