本文共 1705 字，大约阅读时间需要 5 分钟。

具体思路是先将ANSI转换为UNICODE，再将UNICODE转换为UTF8！

bool CodePageConvert(const char* pIn, char* pOut, int sourceCodepage, int targetCodepage) { int sourceLen = MultiByteToWideChar(sourceCodepage, 0, pIn, -1, NULL, 0); if (sourceLen <= 0) { return false; } wchar_t* pUnicode = NULL; pUnicode = new wchar_t[sourceLen+1]; memset(pUnicode, 0, (sourceLen+1)*sizeof(wchar_t)); MultiByteToWideChar(sourceCodepage, 0, pIn,-1, (LPWSTR)pUnicode, sourceLen); BYTE * pTargetData = NULL; int targetLen = WideCharToMultiByte(targetCodepage, 0, (LPWSTR)pUnicode, -1, (char *)pTargetData, 0, NULL, NULL); if (targetLen <= 0) { return false; } pTargetData = new BYTE[targetLen+1]; memset(pTargetData, 0, targetLen+1); WideCharToMultiByte(targetCodepage, 0, (LPWSTR)pUnicode, -1, (char *)pTargetData, targetLen, NULL, NULL); strcpy_s(pOut, targetLen, (char*)pTargetData); delete [] pTargetData; delete [] pUnicode; return true; } bool UTF82ANSI(const char* pIn, char* pOut) { return CodePageConvert(pIn, pOut, CP_UTF8, CP_ACP); } bool ANSI2UTF8(const char* pIn, char* pOut) { return CodePageConvert(pIn, pOut, CP_ACP, CP_UTF8); } std::string string2UTF8(const std::string & str)  {  int nwLen = ::MultiByteToWideChar(CP_ACP, 0, str.c_str(), -1, NULL, 0);  wchar_t * pwBuf = new wchar_t[nwLen + 1];//一定要加1，不然会出现尾巴  ZeroMemory(pwBuf, nwLen * 2 + 2);  ::MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.length(), pwBuf, nwLen);  int nLen = ::WideCharToMultiByte(CP_UTF8, 0, pwBuf, -1, NULL, NULL, NULL, NULL);  char * pBuf = new char[nLen + 1];  ZeroMemory(pBuf, nLen + 1);  ::WideCharToMultiByte(CP_UTF8, 0, pwBuf, nwLen, pBuf, nLen, NULL, NULL);  std::string retStr(pBuf);  delete []pBuf;  pBuf  = NULL;  delete []pwBuf;  pwBuf = NULL;  return retStr;  } 

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