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特搜集了UTF-8,UNICODE,Gb2312他们3个之间的相互转换.% \; X2 D3 r6 f9 V3 { p
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UTF-8: 3字节一个字符8 H/ k0 k C& a& ` X7 [
UNICODE: 2字节一个字符/ U O- `* f* ?3 ~( j
GB2312: 1字节一个字符% H* H. \8 h4 N4 X9 ^
6 Z8 R9 Y( P; d. `; A4 E例子:
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2 k$ \' b: ^1 v$ x. f4 @% V* U“你”字的UTF-8编码: E4 BD A0 11100100 10111101 10100000; R1 [- F* ^$ G' F
“你”的Unicode编码: 4F 60 01001111 01100000! Q: W/ n- _+ Y
按照UTF-8的编码规则,分解如下:xxxx0100 xx111101 xx100000
7 s! F2 K& ^' W$ c把除了x之外的数字拼接在一起,就变成“你”的Unicode编码了。
5 l! J/ j* J# _注意UTF-8的最前面3个1,表示整个UTF-8串是由3个字节构成的。- Y! C8 A0 K/ r5 u8 g' D
经过UTF-8编码之后,再也不会出现敏感字符了,因为最高位始终为1。
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8 h* J9 h9 U$ z P! y类定义
! r* m) @- k; j, J/ ^7 @- class CChineseCode( G7 ~# C- ~ |* K# Q
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- public:
7 I8 a: e8 ^( W# I - static void UTF_8ToUnicode(wchar_t* pOut,char *pText); // 把UTF-8转换成Unicode4 f5 T. B6 j0 c1 q; A
- static void UnicodeToUTF_8(char* pOut,wchar_t* pText); //Unicode 转换成UTF-8. D( K! v1 v* e
- static void UnicodeToGB2312(char* pOut,wchar_t uData); // 把Unicode 转换成 GB2312
# u" O8 f$ I% ?& U - static void Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer);// GB2312 转换成 Unicode! r9 I/ l& A& {, V- y# v6 h
- static void GB2312ToUTF_8(string& pOut,char *pText, int pLen);//GB2312 转为 UTF-8
% J6 g8 i2 C+ l" z# Z3 v - static void UTF_8ToGB2312(string &pOut, char *pText, int pLen);//UTF-8 转为 GB23129 }9 k& a: j! C1 G) @
- };
复制代码 类实现
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- void CChineseCode::UTF_8ToUnicode(wchar_t* pOut,char *pText)
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% ]. u6 }+ S: m2 ^* Z6 L! w - char* uchar = (char *)pOut;
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- uchar[1] = ((pText[0] & 0x0F) << 4) + ((pText[1] >> 2) & 0x0F);% Q6 k* m9 J& o1 o
- uchar[0] = ((pText[1] & 0x03) << 6) + (pText[2] & 0x3F);
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- return;" j9 f- t: q! m, t8 k
- }
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- void CChineseCode::UnicodeToUTF_8(char* pOut,wchar_t* pText)
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1 z9 E a( A; b0 T9 g" d - // 注意 WCHAR高低字的顺序,低字节在前,高字节在后
0 F6 x/ W9 ~6 Z - char* pchar = (char *)pText;
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- pOut[0] = (0xE0 | ((pchar[1] & 0xF0) >> 4));8 j# V a* H4 h- }! x
- pOut[1] = (0x80 | ((pchar[1] & 0x0F) << 2)) + ((pchar[0] & 0xC0) >> 6);) f- A' J( o4 ?7 }1 i+ `
- pOut[2] = (0x80 | (pchar[0] & 0x3F));( G1 `2 V! \! Q
8 v0 B4 r# ^6 W R) }$ ]* K3 o- return;
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- void CChineseCode::UnicodeToGB2312(char* pOut,wchar_t uData)4 k$ _! |$ |8 E8 E. Y+ D
- {
2 J% U$ Q/ p) g5 Y% a - WideCharToMultiByte(CP_ACP,NULL,&uData,1,pOut,sizeof(wchar_t),NULL,NULL);
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- Y# j. j" q3 d0 @0 y0 @* g) ^- void CChineseCode::Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer)
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- ::MultiByteToWideChar(CP_ACP,MB_PRECOMPOSED,gbBuffer,2,pOut,1);8 _+ O; H4 a: y0 f$ r
- return ;
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' Q5 I- h. F8 m" W/ x: g8 Z# g- void CChineseCode::GB2312ToUTF_8(string& pOut,char *pText, int pLen)$ t3 @9 C5 x& B; Z9 K6 r
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- char buf[4];
4 M9 f4 E+ f& U/ P' i3 | - int nLength = pLen* 3;& R- j, t ^! l" u8 g; O. k
- char* rst = new char[nLength];9 P$ X7 V3 t2 Z+ o* }% }- E
-
# I; }/ n, I: i - memset(buf,0,4);% P3 ]% L& t! {/ B' C- o" {0 I6 K0 g- n; m
- memset(rst,0,nLength);
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/ u1 r* [# ?' u5 _ - int i = 0;
) c+ Q8 ^; V/ c% e$ s - int j = 0; 9 O6 y" ~# x: M
- while(i < pLen)+ ]5 n6 U7 M1 T6 |. |
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- //如果是英文直接复制就可以
" g# d1 B' B! p; w( g - if( *(pText + i) >= 0)
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- rst[j++] = pText[i++];& ~8 h4 ]7 w O" Z7 n* y1 ^
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- else, M; B! U( X( x0 e" a$ C
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- wchar_t pbuffer;; \8 S1 K9 L# T6 u
- Gb2312ToUnicode(&pbuffer,pText+i); [3 |, `, j. H# u I
-
4 D0 H5 }! l, T9 `6 x3 ~2 ^' R; g6 E - UnicodeToUTF_8(buf,&pbuffer);
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- unsigned short int tmp = 0;# c% C: d k- {4 G' Y( Q
- tmp = rst[j] = buf[0];1 F% M8 ?6 U4 f4 U9 \
- tmp = rst[j+1] = buf[1];
4 R7 ?: {9 ?) ]% D: S2 \- ^6 ]5 q - tmp = rst[j+2] = buf[2];
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- j += 3;7 Q. h8 T) t8 n
- i += 2;
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- rst[j] = '\0';9 e4 @# Z0 J1 U) w. _
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- //返回结果
5 `! d0 ?7 m! \3 q - pOut = rst;
0 o2 `% `* J/ A! Y - delete []rst;
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- return;, L1 n: J0 ~8 P
- }
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- void CChineseCode::UTF_8ToGB2312(string &pOut, char *pText, int pLen)
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: G( a$ r/ B0 C% f$ o6 v - char * newBuf = new char[pLen];: z4 W$ ?9 T, I8 ]/ A5 _
- char Ctemp[4];5 A2 T8 a K% b2 r& ]
- memset(Ctemp,0,4);( v# l$ _* }- Z
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- int i =0;
: h, a9 p0 n, _ - int j = 0;
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/ z# A& I4 x3 S3 X2 u - while(i < pLen)0 C" R# e/ A8 Z. N# A
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- if(pText[i] > 0)
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I5 f# I6 J' Y0 x/ V3 ? - newBuf[j++] = pText[i++];
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- else , y4 U8 N5 q1 H6 t
- {
3 }& h/ d" b5 `! i- y( Z - WCHAR Wtemp;
" i4 k, h* K" n9 b! O - UTF_8ToUnicode(&Wtemp,pText + i);
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! X, ^+ e7 M0 \! a9 w - UnicodeToGB2312(Ctemp,Wtemp);
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3 s. R# a0 ~" L! ^ - newBuf[j] = Ctemp[0];
; G% O2 J7 w( a8 x5 D) [ - newBuf[j + 1] = Ctemp[1];
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5 T! y( Q( K' X: P. g8 b- i += 3; ) S& F: t' W- d _0 H/ v$ z
- j += 2;
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* h! c+ z( W$ n B" S - newBuf[j] = '\0';
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D2 v, _- |/ A; B) v) y0 @ - pOut = newBuf;% q5 ?: l6 E. G7 d4 W
- delete []newBuf;( C6 k: x6 g) J& C' e+ [
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- return; 4 C+ {5 o; f+ o6 m' A
- }
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