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1s;j&|$U'y)a*S#H 字符集之间转换(UTF-8,UNICODE,Gb2312) 特搜集了UTF-8,UNICODE,Gb2312他们3个之间的相互转换. UTF-8: 3字节一个字符 UNICODE: 2字节一个字符 GB2312: 1字节一个字符 例子： “你”字的UTF-8编码: E4 BD A0 11100100 10111101 10100000 “你”的Unicode编码: 4F 60 01001111 01100000 按照UTF-8的编码规则，分解如下：xxxx0100 xx111101 xx100000 把除了x之外的数字拼接在一起，就变成“你”的Unicode编码了。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。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。 类定义 class CChineseCode { public: static void UTF_8ToUnicode(wchar_t* pOut,char *pText); // 把UTF-8转换成Unicode static void UnicodeToUTF_8(char* pOut,wchar_t* pText); //Unicode 转换成UTF-8 static void UnicodeToGB2312(char* pOut,wchar_t uData); // 把Unicode 转换成 GB2312 static void Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer);// GB2312 转换成 Unicode static void GB2312ToUTF_8(string& pOut,char *pText, int pLen);//GB2312 转为 UTF-8 static void UTF_8ToGB2312(string &pOut, char *pText, int pLen);//UTF-8 转为 GB2312 }; 类实现 void CChineseCode::UTF_8ToUnicode(wchar_t* pOut,char *pText) { char* uchar = (char *)pOut; uchar[1] = ((pText[0] & 0x0F) << 4) + ((pText[1] >> 2) & 0x0F); uchar[0] = ((pText[1] & 0x03) << 6) + (pText[2] & 0x3F); return; } void CChineseCode::UnicodeToUTF_8(char* pOut,wchar_t* pText) { // 注意 WCHAR高低字的顺序,低字节在前，高字节在后 char* pchar = (char *)pText; pOut[0] = (0xE0 | ((pchar[1] & 0xF0) >> 4)); pOut[1] = (0x80 | ((pchar[1] & 0x0F) << 2)) + ((pchar[0] & 0xC0) >> 6); pOut[2] = (0x80 | (pchar[0] & 0x3F)); return; } void CChineseCode::UnicodeToGB2312(char* pOut,wchar_t uData) { WideCharToMultiByte(CP_ACP,NULL,&uData,1,pOut,sizeof(wchar_t),NULL,NULL); return; } void CChineseCode::Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer) { ::MultiByteToWideChar(CP_ACP,MB_PRECOMPOSED,gbBuffer,2,pOut,1); return ; } void CChineseCode::GB2312ToUTF_8(string& pOut,char *pText, int pLen) { char buf[4]; int nLength = pLen* 3; char* rst = new char[nLength]; memset(buf,0,4); memset(rst,0,nLength); int i = 0; int j = 0; while(i < pLen) { //如果是英文直接复制就可以 if( *(pText + i) >= 0) { rst[j++] = pText[i++]; } else { wchar_t pbuffer; Gb2312ToUnicode(&pbuffer,pText+i); UnicodeToUTF_8(buf,&pbuffer); unsigned short int tmp = 0; tmp = rst[j] = buf[0]; tmp = rst[j+1] = buf[1]; tmp = rst[j+2] = buf[2]; j += 3; i += 2; } } rst[j] = '\0'; //返回结果 pOut = rst; delete []rst; return; } void CChineseCode::UTF_8ToGB2312(string &pOut, char *pText, int pLen) { char * newBuf = new char[pLen]; char Ctemp[4]; memset(Ctemp,0,4); int i =0; int j = 0; while(i < pLen) { if(pText > 0) { newBuf[j++] = pText[i++]; } else { WCHAR Wtemp; UTF_8ToUnicode(&Wtemp,pText + i); UnicodeToGB2312(Ctemp,Wtemp); newBuf[j] = Ctemp[0]; newBuf[j + 1] = Ctemp[1]; i += 3; j += 2; } } newBuf[j] = '\0'; pOut = newBuf; delete []newBuf; return;
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