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特搜集了UTF-8,UNICODE,Gb2312他们3个之间的相互转换.; i( U/ f" `- r3 |7 w
2 l, w0 `9 `' p. _6 nUTF-8: 3字节一个字符. D/ h7 o, ]& i6 m
UNICODE: 2字节一个字符
6 ]* f( l D9 N( L9 F q( O( x2 TGB2312: 1字节一个字符
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) Y5 n5 o7 H6 V$ W5 l( p7 H例子:
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“你”字的UTF-8编码: E4 BD A0 11100100 10111101 10100000
H+ m7 g; S c" V G“你”的Unicode编码: 4F 60 01001111 01100000
' [6 j# a8 e1 Q0 H7 D+ E6 k按照UTF-8的编码规则,分解如下:xxxx0100 xx111101 xx100000
' t5 B) q P( I把除了x之外的数字拼接在一起,就变成“你”的Unicode编码了。
% e; Y7 ?& m; H/ ^* g7 h9 i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。8 C: h# ~) l0 h# w0 M& Q8 N. i3 S7 K
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。6 A8 D: E- c, C; l3 ^. {
0 O6 H. n6 \/ o6 N* g; T4 z+ |类定义" H& E* g4 z7 e! Q; {! y; w* E
- class CChineseCode
& d3 P, A% ~ f& T5 @/ n4 | - {
1 y& f5 e/ Q9 c2 V - public:
1 B- o- C; E7 D* n - static void UTF_8ToUnicode(wchar_t* pOut,char *pText); // 把UTF-8转换成Unicode
5 d1 C% i5 N6 `3 j - static void UnicodeToUTF_8(char* pOut,wchar_t* pText); //Unicode 转换成UTF-8
/ E. A3 d) } e: h N8 d. J5 j5 L - static void UnicodeToGB2312(char* pOut,wchar_t uData); // 把Unicode 转换成 GB2312 0 P. O7 P7 z4 y8 k8 D( a1 ^
- static void Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer);// GB2312 转换成 Unicode/ a, S P+ \' {" B: r4 _
- static void GB2312ToUTF_8(string& pOut,char *pText, int pLen);//GB2312 转为 UTF-8
( P0 {# F# t0 ~. e - static void UTF_8ToGB2312(string &pOut, char *pText, int pLen);//UTF-8 转为 GB2312
0 T j2 _2 k6 C8 L9 z9 O2 s& A, N - };
复制代码 类实现6 R: Q2 k$ u8 [, P9 E! x
0 b( k( O. y+ N+ z2 F- void CChineseCode::UTF_8ToUnicode(wchar_t* pOut,char *pText); R ?& e/ s6 b3 V; U2 H$ P
- {
. ~' [& m" I3 z( O4 I* p# ?: i - char* uchar = (char *)pOut;
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- uchar[1] = ((pText[0] & 0x0F) << 4) + ((pText[1] >> 2) & 0x0F);
* h& C% q" U/ `0 S% [( j1 V8 r - uchar[0] = ((pText[1] & 0x03) << 6) + (pText[2] & 0x3F);( {5 B' Y0 `5 Q- f, i$ B
/ w0 x0 E0 y- P( c& _! z7 {, e- return;
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- void CChineseCode::UnicodeToUTF_8(char* pOut,wchar_t* pText)
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' X8 B0 [5 o+ h - // 注意 WCHAR高低字的顺序,低字节在前,高字节在后+ K- P7 i9 {; k. I
- char* pchar = (char *)pText;& K% Z5 P S- L
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- pOut[0] = (0xE0 | ((pchar[1] & 0xF0) >> 4));4 S1 E( r4 E# K
- pOut[1] = (0x80 | ((pchar[1] & 0x0F) << 2)) + ((pchar[0] & 0xC0) >> 6);2 ^: p% D0 F% x) X3 m! t
- pOut[2] = (0x80 | (pchar[0] & 0x3F));; Z& k$ |8 A/ m
7 F" L a' f; a* X* ]- return;
2 M% k+ a5 g5 ?/ H - }
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- void CChineseCode::UnicodeToGB2312(char* pOut,wchar_t uData)
. @3 v! X+ Q& B$ f - {
4 h* n" Y/ n8 E9 K& P - WideCharToMultiByte(CP_ACP,NULL,&uData,1,pOut,sizeof(wchar_t),NULL,NULL);8 \/ W/ _, K9 K% Y: \$ G. _% D! g
- return;; r) R9 a, _- z! l3 Z9 m' K9 f% T
- }
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; {6 m' F1 m r J3 g3 F- void CChineseCode::Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer)
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' B& t4 |; ^6 \7 H1 | - ::MultiByteToWideChar(CP_ACP,MB_PRECOMPOSED,gbBuffer,2,pOut,1);. x6 I7 ~+ j+ N. U0 r* e" d
- return ;
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- void CChineseCode::GB2312ToUTF_8(string& pOut,char *pText, int pLen)+ R) ]. i& D1 Q/ F: B9 a5 n7 |( l [( V
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- char buf[4];8 E) V+ A2 |2 i c* r
- int nLength = pLen* 3;
" U3 O- v; c& r - char* rst = new char[nLength];
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6 X2 y3 B, p4 Z - memset(buf,0,4);
: M5 B8 e9 U- F/ o. i) h1 R - memset(rst,0,nLength);
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- int i = 0;
" H1 g p3 B0 \ - int j = 0;
0 t% |; W! P" f! _0 l - while(i < pLen)
# |* w# m4 n! F2 i - {
( m- b! q2 O) H+ g" @6 L: ]/ o - //如果是英文直接复制就可以
5 T3 h8 l4 I, m" u9 E8 P - if( *(pText + i) >= 0)' N5 j( o H6 i3 S7 V, z
- {
3 z1 g7 n/ Q9 X; w2 U7 m0 S: y - rst[j++] = pText[i++];) w* l% S( [5 p" H+ W- w
- }
! {! H+ U: y3 Q8 b - else( {' o+ k; `1 O/ g, ~" o
- {& S) t4 B0 a, v+ s/ x
- wchar_t pbuffer;
9 @' I7 _; ~! V$ Q& l( F& b! _ - Gb2312ToUnicode(&pbuffer,pText+i);, ]6 E2 `; F* c2 L$ m/ B
- + R. D9 P( m. w) K1 ]4 E0 }
- UnicodeToUTF_8(buf,&pbuffer);
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- unsigned short int tmp = 0;
! m, W* A1 {, p6 M X - tmp = rst[j] = buf[0];# H( x& {) A+ A3 `' d
- tmp = rst[j+1] = buf[1];
* B d, y: H P) }9 D/ f2 ~3 ^: o - tmp = rst[j+2] = buf[2];
" w, i7 L( z4 x& O3 x -
! W+ }, h8 } M# @ - j += 3;4 s+ G! [0 U2 k
- i += 2;
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- A( F0 m% x: B0 w6 M& Z& o; D - }3 I) A+ d K. E8 V6 k' ]
- rst[j] = '\0';
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" a3 b1 U: Q: E7 h7 L% [- //返回结果, K% Z! Q7 `, x: J1 D' Z
- pOut = rst;
/ ]' ?: B1 i" Q1 O - delete []rst; 5 u. _/ S: ^# l* X7 R% j- F
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- return;0 ~% D* |3 g6 i' o& L5 D8 M. C# D# L
- }
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- void CChineseCode::UTF_8ToGB2312(string &pOut, char *pText, int pLen)/ P! C- I. D% w+ f
- {
5 J! R1 j* A; f- ~) I5 Y - char * newBuf = new char[pLen];+ |- C" `( N( Y- e9 t* C# a' D2 N
- char Ctemp[4];
6 ~+ G2 w" B5 G& T* E+ N - memset(Ctemp,0,4);' G; d$ v3 h+ ~! j
- ( ^1 O+ b% D$ k1 j6 Y. L6 A
- int i =0;
2 i6 R ~) h9 W# ^# z. m - int j = 0;# Q1 }7 f* L5 h( _
- " \- k3 B, u" c
- while(i < pLen)
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- if(pText[i] > 0)2 Q+ O1 G0 i- @% J- X
- {
- X/ D& Q6 `8 G# A - newBuf[j++] = pText[i++]; 2 l- G# J; b% k
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- else 7 T3 ^. }" U& q. ^8 G) z4 X4 F. t
- {8 S) k. T+ l$ v
- WCHAR Wtemp;
8 i3 C0 w9 ]8 q0 E& T - UTF_8ToUnicode(&Wtemp,pText + i);6 C* X- i4 T* h) x& g
-
3 C+ p6 j! g: }' n' g, w! m - UnicodeToGB2312(Ctemp,Wtemp);
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# Z4 _! I4 L8 t1 Z W2 v - newBuf[j] = Ctemp[0];8 S/ z% _+ l' Y
- newBuf[j + 1] = Ctemp[1];, x9 M+ s! i+ {. p8 L
- : L/ n0 I" d% T2 x$ F
- i += 3; 0 O' L q" } {$ e4 d
- j += 2; 9 E4 [4 Q5 D) z/ f% O; I, n
- }
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- newBuf[j] = '\0';
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3 g2 p9 B c) ~ - pOut = newBuf;2 Y# z2 Q# m+ |% U
- delete []newBuf;6 s6 r+ b; J3 r/ _- ?: c" @
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- return; 2 c6 R! a9 }8 C( a& F( K
- }
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