宽字符和UTF8之间的转换

在网络传输中对字符的转换：

//宽字符转换UTF8string EncodeUtf8(wstring in){ string s(in.length() * 3, ' '); size_t len = ::WideCharToMultiByte(CP_UTF8, 0, in.c_str(), in.length(), &s[0], s.length(), NULL, NULL); s.resize(len); return s;}//UTF8转宽字符wstring DecodeUtf8(string in){ wstring s(in.length(), _T(' ')); size_t len = ::MultiByteToWideChar(CP_UTF8, 0, in.c_str(), in.length(), &s[0],s.length()); s.resize(len); return s;}