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特搜集了UTF-8,UNICODE,Gb2312他们3个之间的相互转换.) f9 d4 `$ S8 V7 O" o
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UTF-8: 3字节一个字符
& o7 b* w9 x; Y( { t! uUNICODE: 2字节一个字符
) H! i6 l6 T& x( {3 q% U# l' wGB2312: 1字节一个字符
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例子:' O( [7 E, i1 S) R
, }3 ]' N$ k2 S7 e4 D Z/ y“你”字的UTF-8编码: E4 BD A0 11100100 10111101 10100000
) S' B; ]+ {% z+ v( I" S$ `“你”的Unicode编码: 4F 60 01001111 01100000; L0 i7 q9 I2 R0 d' U$ x
按照UTF-8的编码规则,分解如下:xxxx0100 xx111101 xx100000
4 d0 A$ P- z& Y3 ]把除了x之外的数字拼接在一起,就变成“你”的Unicode编码了。# t b: L/ i* g$ V- q) B% l" J4 g
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。2 _ t: v) Y) G
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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类定义6 v+ U6 U8 w. @9 D( i1 u
- class CChineseCode
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: v8 p, F1 r8 B& z, n, n - public:
/ d. Z8 s. w7 \ C" {, d, n3 w - static void UTF_8ToUnicode(wchar_t* pOut,char *pText); // 把UTF-8转换成Unicode
3 N) p1 j8 C7 U6 w7 n( y - static void UnicodeToUTF_8(char* pOut,wchar_t* pText); //Unicode 转换成UTF-8
0 A; |7 x: x U' }+ {5 _8 | - static void UnicodeToGB2312(char* pOut,wchar_t uData); // 把Unicode 转换成 GB2312 3 \* _ Q3 a, S' W$ j: W3 v
- static void Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer);// GB2312 转换成 Unicode
D, ^5 q7 V& `3 X; p& R/ S - static void GB2312ToUTF_8(string& pOut,char *pText, int pLen);//GB2312 转为 UTF-8. l9 L$ `* C5 _$ j! t& z
- static void UTF_8ToGB2312(string &pOut, char *pText, int pLen);//UTF-8 转为 GB2312
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复制代码 类实现
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9 U) ^# s! w4 F' h/ C& |- void CChineseCode::UTF_8ToUnicode(wchar_t* pOut,char *pText)
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- char* uchar = (char *)pOut;
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! S- q* H4 N! B- uchar[1] = ((pText[0] & 0x0F) << 4) + ((pText[1] >> 2) & 0x0F);7 ?5 r* V" P! C+ X J8 E! v6 E
- uchar[0] = ((pText[1] & 0x03) << 6) + (pText[2] & 0x3F);* \$ R" q }6 h
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- return;; z6 b3 {# j; X
- }
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0 l) V; {! S( q" |& y; x" G- void CChineseCode::UnicodeToUTF_8(char* pOut,wchar_t* pText)# Y6 A+ `! L2 c1 J
- {# I2 f2 i, C' a) t% @: s, ?4 S$ \
- // 注意 WCHAR高低字的顺序,低字节在前,高字节在后. w: p# e# x N
- char* pchar = (char *)pText;
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- pOut[0] = (0xE0 | ((pchar[1] & 0xF0) >> 4));
! L; M( b9 J5 d6 p - pOut[1] = (0x80 | ((pchar[1] & 0x0F) << 2)) + ((pchar[0] & 0xC0) >> 6);( G/ q* A) h" e2 L. m
- pOut[2] = (0x80 | (pchar[0] & 0x3F));7 s; t8 O" k& Y, f$ s r& I
1 H, @4 [8 E* Z- return;
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& X* W9 A6 \) |1 i- void CChineseCode::UnicodeToGB2312(char* pOut,wchar_t uData)0 u" q+ l8 ]2 [* ]
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- WideCharToMultiByte(CP_ACP,NULL,&uData,1,pOut,sizeof(wchar_t),NULL,NULL);
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- void CChineseCode::Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer)& a0 _5 s% H# ?* K
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- ::MultiByteToWideChar(CP_ACP,MB_PRECOMPOSED,gbBuffer,2,pOut,1);
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- void CChineseCode::GB2312ToUTF_8(string& pOut,char *pText, int pLen)
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- char buf[4]; v B4 g" ~) S0 K+ o, k
- int nLength = pLen* 3;; r; t5 V5 W+ s. R
- char* rst = new char[nLength];
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- memset(buf,0,4);' u; F' G( r5 w4 x9 t {; P8 K5 l
- memset(rst,0,nLength);. L3 G5 G2 [: _) d
-
/ F7 S P% D8 c8 e - int i = 0;, A- P% Z& m, v8 ^+ m
- int j = 0;
( J! ^* J% S% d' ]6 N7 z! s" {7 m - while(i < pLen)
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, f' }, w @4 J/ v; A - //如果是英文直接复制就可以
' @6 w/ t/ ^! [# L - if( *(pText + i) >= 0)
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- rst[j++] = pText[i++];4 d0 Q$ | f7 I/ _
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- {
, H, Y1 u6 \5 B A& B2 ? - wchar_t pbuffer;8 Y) @2 V3 p$ F7 \: g6 H
- Gb2312ToUnicode(&pbuffer,pText+i);) s+ m( j* v, j$ A7 ?- B
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) \# f2 W6 X) M, C4 F4 p0 k' t- O - UnicodeToUTF_8(buf,&pbuffer);
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, ^2 |1 ^& h" m1 U* e7 | - unsigned short int tmp = 0;6 B/ B9 i3 J- u3 U
- tmp = rst[j] = buf[0];
, U# g) B8 c( i" t, Q - tmp = rst[j+1] = buf[1];1 S$ y9 ~/ l$ E0 p' \
- tmp = rst[j+2] = buf[2]; - V" a% N [; ]# `0 n% }7 g* W P
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- j += 3;
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- rst[j] = '\0';9 O+ K: A5 A. w( Y
0 o8 u- w# U; r- //返回结果
# g3 `& B: ^, k - pOut = rst;
, g1 p: h+ G" c2 | - delete []rst;
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$ }, f# X6 I3 j8 j- m - return;$ A3 t! v/ e/ z5 S# a2 h! m! Z
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- void CChineseCode::UTF_8ToGB2312(string &pOut, char *pText, int pLen)
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# v/ p4 c8 C2 [# b% Y! Y# Y/ P& @ - char * newBuf = new char[pLen];, d) m! K; q+ e/ z9 g; w- ]
- char Ctemp[4];$ e& l3 B9 O/ N. F* H
- memset(Ctemp,0,4);
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- int i =0;
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-
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- {
1 V- I' Y; _5 C9 Y/ j& w - if(pText[i] > 0)5 z- a" p' i9 D) n* _
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- newBuf[j++] = pText[i++];
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- else 6 S+ k8 N+ u5 I% e9 U' t
- {
% Y' a* B+ `- U) U - WCHAR Wtemp;4 K) X' V& V% r: l
- UTF_8ToUnicode(&Wtemp,pText + i);
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- UnicodeToGB2312(Ctemp,Wtemp);% j* o& b" W* I1 E% C/ q
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- newBuf[j] = Ctemp[0];
) ~( U+ \& ]' X, x' ~3 Q' z- t/ g - newBuf[j + 1] = Ctemp[1];# h- d! r3 ` M8 @1 d
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- j += 2;
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- newBuf[j] = '\0';( T" H. _( a& F% d0 K% j
-
3 l& F3 l( A$ _ i' M& s8 w - pOut = newBuf;/ m) P/ b9 F4 e
- delete []newBuf;
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- return; & t X. T- C6 T& Y* d: U
- }
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