关于utf8转码问题
要和服务器端通信，中文（std::wtring）转utf8，用的是SysWideToMultiByte(wide, CP_UTF8);但看到有些网页上的中文转utf8转换器，转出来的结果完全不一样，比如这些：
中文:
中国互联网络信息中心.cn
http://www.tool.la/UTF-8/
http://tool.chinaz.com/Tools/UTF-8.aspx

中国互联网络信息中心.cn

我转出来的结果和windows notepad一致：

0x E4 E8 AD E5 9B BD E4 BA 92 E8 81 94 E7 BD 91 E7 BB 9C E4 BF A1 E6 81 AF E4 B8 AD E5 BF 83 (2E 63 6E .cn)

求助ing~~~~~~

[解决办法]
WideCharToMultiByte(CP_UTF8, ……） 要从UNICODE转到UTF8
如果是ANSI字符的话，还得转成UNICODE字符， MultiByteToWideChar(CP_ACP, ……）



[解决办法]
\xe4\xb8\xad\xe5\x9b\xbd\xe4\xba\x92\xe8\x81\x94\xe7\xbd\x91\xe7\xbb\x9c\xe4\xb
f\xa1\xe6\x81\xaf\xe4\xb8\xad\xe5\xbf\x83.cn
[解决办法]
以前为了使用 SQLite, 编写的一个转换类.

C/C++ code

class CTranslateUTF8{public:    CTranslateUTF8(void);    ~CTranslateUTF8(void);    static BOOL AsciiToUnicode(LPWSTR strDes,int &iDesSize,LPCSTR strSrc);    static BOOL UnicodeToAscii(LPSTR strDes,int &iDesSize,LPCWSTR strSrc);    static BOOL UnicodeToUtf8(LPSTR strDes,int &iDesSize,LPCWSTR strSrc);    static BOOL Utf8ToUnicode(LPWSTR strDes,int &iDesSize,LPCSTR strSrc);    static BOOL AsciiToUtf8(LPSTR strDes,int &iDesSize,LPCSTR strSrc);    static BOOL Utf8ToAscii(LPSTR strDes,int &iDesSize,LPCSTR strSrc);    static BOOL Utf8ToTstr(LPTSTR strDes,int &iDesSize,LPCSTR strSrc);    static BOOL TstrToUtf8(LPSTR strDes,int &iDesSize,LPCTSTR strSrc);    static BOOL TstrToUnicode(LPWSTR strDes,int &iDesSize,LPCTSTR strSrc);    static BOOL TstrToAscii(LPSTR strDes,int &iDesSize,LPCTSTR strSrc);    static BOOL AsciiToTstr(LPTSTR strDes,int &iDesSize,LPCSTR strSrc);};#include "StdAfx.h"#include "TranslateUTF8.h"CTranslateUTF8::CTranslateUTF8(void){}CTranslateUTF8::~CTranslateUTF8(void){}BOOL CTranslateUTF8::UnicodeToAscii(LPSTR strDes,int &iDesSize,LPCWSTR strSrc){    char*     pElementText=NULL;    int    iTextLen=0;    // wide char to multi char    iTextLen = WideCharToMultiByte( CP_ACP,        0,        strSrc,        -1,        NULL,        0,        NULL,        NULL );    if(iDesSize<iTextLen+2)    {        iDesSize=iTextLen+2;        return FALSE;    }    pElementText = new char[iTextLen + 1];    memset( ( void* )pElementText, 0, sizeof( char ) * ( iTextLen + 1 ) );    ::WideCharToMultiByte( CP_ACP,        0,        strSrc,        -1,        pElementText,        iTextLen,        NULL,        NULL );    memcpy(strDes,pElementText,iTextLen);    delete[] pElementText;    return TRUE;}BOOL CTranslateUTF8::AsciiToUnicode(LPWSTR strDes,int &iDesSize,LPCSTR strSrc){    //int len = 0;    //len = strlen(strSrc);    int unicodeLen = ::MultiByteToWideChar( CP_ACP,        0,        strSrc,        -1,        NULL,        0 );     if(iDesSize<unicodeLen+2)    {        iDesSize=unicodeLen+2;        return FALSE;    }    wchar_t * pUnicode=NULL;     pUnicode = new wchar_t[unicodeLen+1];     memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t));     ::MultiByteToWideChar( CP_ACP,        0,        strSrc,        -1,        (LPWSTR)pUnicode,        unicodeLen );     memcpy(strDes,pUnicode,unicodeLen*2);    delete [] pUnicode;     return TRUE; }BOOL CTranslateUTF8::UnicodeToUtf8(LPSTR strDes,int &iDesSize,LPCWSTR strSrc){    char*     pElementText=NULL;    int    iTextLen=0;    // wide char to multi char    iTextLen = WideCharToMultiByte( CP_UTF8,        0,        strSrc,        -1,        NULL,        0,        NULL,        NULL );    if(iDesSize<iTextLen+2)    {        iDesSize=iTextLen+2;        return FALSE;    }    pElementText = new char[iTextLen + 1];    memset( ( void* )pElementText, 0, sizeof( char ) * ( iTextLen + 1 ) );    ::WideCharToMultiByte( CP_UTF8,        0,        strSrc,        -1,        pElementText,        iTextLen,        NULL,        NULL );    memcpy(strDes,pElementText,iTextLen);    delete[] pElementText;    return TRUE;}BOOL CTranslateUTF8::Utf8ToUnicode(LPWSTR strDes,int &iDesSize,LPCSTR strSrc){    //int len = 0;    //len = strlen(strSrc);    int unicodeLen = ::MultiByteToWideChar( CP_UTF8,        0,        strSrc,        -1,        NULL,        0 );     if(iDesSize<unicodeLen+2)    {        iDesSize=unicodeLen+2;    }    wchar_t * pUnicode;     pUnicode = new wchar_t[unicodeLen+1];     memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t));     ::MultiByteToWideChar( CP_UTF8,        0,        strSrc,        -1,        (LPWSTR)pUnicode,        unicodeLen );     memcpy(strDes,pUnicode,unicodeLen*2);    delete [] pUnicode;     return TRUE;}BOOL CTranslateUTF8::AsciiToUtf8(LPSTR strDes,int &iDesSize,LPCSTR strSrc){    WCHAR *buf=new WCHAR[iDesSize];    memset(buf,0,iDesSize*2);    int len=iDesSize;    if(AsciiToUnicode(buf,len,strSrc))    {        if(UnicodeToUtf8(strDes,iDesSize,buf))        {            delete [] buf;            return TRUE;        }    }    delete [] buf;    return FALSE;}BOOL CTranslateUTF8::Utf8ToAscii(LPSTR strDes,int &iDesSize,LPCSTR strSrc){    WCHAR *buf=new WCHAR[iDesSize];    memset(buf,0,iDesSize*2);    int len=iDesSize;    if(Utf8ToUnicode(buf,len,strSrc))    {        if(UnicodeToAscii(strDes,iDesSize,buf))        {            delete [] buf;            return TRUE;        }    }    delete [] buf;    return FALSE;}BOOL CTranslateUTF8::Utf8ToTstr(LPTSTR strDes,int &iDesSize,LPCSTR strSrc){#ifdef _UNICODE    return Utf8ToUnicode(strDes,iDesSize,strSrc);#else    return Utf8ToAscii(strDes,iDesSize,strSrc);#endif}BOOL CTranslateUTF8::TstrToUtf8(LPSTR strDes,int &iDesSize,LPCTSTR strSrc){#ifdef _UNICODE    return UnicodeToUtf8(strDes,iDesSize,strSrc);#else    return AsciiToUtf8(strDes,iDesSize,strSrc);#endif}BOOL CTranslateUTF8::TstrToAscii(LPSTR strDes,int &iDesSize,LPCTSTR strSrc){#ifdef _UNICODE    return UnicodeToAscii(strDes,iDesSize,strSrc);#else    memcpy(strDes,strSrc,strlen(strSrc));    return TRUE;#endif    return TRUE;}BOOL CTranslateUTF8::TstrToUnicode(LPWSTR strDes,int &iDesSize,LPCTSTR strSrc){#ifdef _UNICODE    memcpy(strDes,strSrc,wcslen(strSrc)*2);    return TRUE;#else    return AsciiToUnicode(strDes,iDesSize,strSrc);#endif}BOOL CTranslateUTF8::AsciiToTstr(LPTSTR strDes,int &iDesSize,LPCSTR strSrc){#ifdef _UNICODE    return AsciiToUnicode(strDes,iDesSize,strSrc);#else    strcpy_s(strDes,iDesSize,strSrc);    return TRUE;#endif}