⽤C++写⼊UTF-8格式的⽂件
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
};
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+1];
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+1];
char Ctemp[4];
memset(Ctemp,0,4);
int i =0;
int j = 0;
while(i < pLen)
{
if(pText[i] > 0)
{
newBuf[j++] = pText[i++];
unicode文件格式
}
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;
return;
}
void main(void)
{
ofstream ofOut("11.txt") ;
std::string strTemp("我叫⽯海龙\n") ;
CChineseCode::GB2312ToUTF_8(strTemp, (char*)strTemp.c_str(), strTemp.size()) ; ofOut << strTemp.c_str() ;
ofOut.flush() ;
int i = 0 ;
}

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