UTF8与GBK字符编码转换

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我是靠谱客的博主知性白羊，这篇文章主要介绍UTF8与GBK字符编码转换，现在分享给大家，希望可以做个参考。

utf8与gbk字符之间的转换主要用到两个方法

WideCharToMultiByte：http://baike.baidu.com/view/2083430.htm?fr=aladdin

MultiByteToWideChar：http://baike.baidu.com/view/1907282.htm?fr=aladdin

使用这两个方法就可以成功转换。

将GBK转换成UTF8

std::string GBKtoUTF8(const std::string& str)
{
   std::string strout = "";
   WCHAR * strGBK;
   int len = MultiByteToWideChar(CP_ACP, 0, str.c_str(), -1, NULL, 0);
   strGBK = new WCHAR[len];
   MultiByteToWideChar(CP_ACP, 0, str.c_str(), -1, strGBK, len);

   len = WideCharToMultiByte(CP_UTF8, 0, strGBK, -1, NULL, 0, NULL, NULL);
   char * strUTF8 = new char[len];
   WideCharToMultiByte(CP_UTF8, 0, strGBK, -1, strUTF8, len, NULL, NULL);

   //memcpy(str, strUTF8, strlen(strUTF8));

   strout = strUTF8;

   delete[] strGBK;
   strGBK = NULL;
   delete[] strUTF8;
   strUTF8 = NULL;

   return strout;
}
将UTF8转换成GBK

std::string UTF8toGBK(const std::string& strint)
{
   std::string strout = "";
   int len = MultiByteToWideChar(CP_UTF8, 0, strint.c_str(), -1, NULL, 0);
   unsigned short * wszGBK = new unsigned short[len + 1];
   memset(wszGBK, 0, len * 2 + 2);
   MultiByteToWideChar(CP_UTF8, 0, strint.c_str(), -1, (LPWSTR)wszGBK, len);

   len = WideCharToMultiByte(CP_ACP, 0, (LPWSTR)wszGBK, -1, NULL, 0, NULL, NULL);
   char *szGBK = new char[len + 1];
   memset(szGBK, 0, len + 1);
   WideCharToMultiByte(CP_ACP,0, (LPWSTR)wszGBK, -1, szGBK, len, NULL, NULL);
   //strUTF8 = szGBK;
   //memcpy(strout, szGBK, strlen(szGBK));

   strout = szGBK;

   delete[]szGBK;
   delete[]wszGBK;

   return strout;
}