UTF-8和Unicode互转

1、Unicode转UTF-8

 1 void CodeCovertTool::UNICODE_to_UTF8(const CString& unicodeString, std::string& str)
 2 {//Unicode转UTF8
 3     int stringLength = ::WideCharToMultiByte(CP_UTF8, NULL, unicodeString, wcslen(unicodeString), NULL, 0, NULL, NULL);
 4 
 5     char* buffer = new char[stringLength + 1];
 6     ::WideCharToMultiByte(CP_UTF8, NULL, unicodeString, wcslen(unicodeString), buffer, stringLength, NULL, NULL);
 7     buffer[stringLength] = '';
 8 
 9     str = buffer;
10 
11     delete[] buffer;
12 }

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 1 std::string CodeCovertTool::UnicodeToUtf8(const wchar_t* buf)  
 2 {//Unicode转UTF8
 3     int len = ::WideCharToMultiByte(CP_UTF8, 0, buf, -1, NULL, 0, NULL, NULL);  
 4     if (len == 0) return "";  
 5 
 6     std::vector<char> utf8(len);  
 7     ::WideCharToMultiByte(CP_UTF8, 0, buf, -1, &utf8[0], len, NULL, NULL);  
 8 
 9     return &utf8[0];  
10 }

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2、UTF-8转Unicode

 1 std::wstring CodeCovertTool::Utf8ToUnicode(const char* buf)  
 2 {//UTF8转Unicode
 3     int len = ::MultiByteToWideChar(CP_UTF8, 0, buf, -1, NULL, 0);  
 4     if (len == 0) return _T("");  
 5 
 6     std::vector<wchar_t> unicode(len);  
 7     ::MultiByteToWideChar(CP_UTF8, 0, buf, -1, &unicode[0], len);  
 8 
 9     return &unicode[0];  
10 }

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 1 CString CodeCovertTool::Utf8ToUnicode(const std::string &utf8_str)
 2 {//UTF8转Unicode
 3     int len;
 4     len = MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)utf8_str.c_str(), -1, NULL,0);
 5     WCHAR * wszUnicode = new WCHAR[len+1];
 6     memset(wszUnicode, 0, len * 2 + 2);
 7     MultiByteToWideChar(CP_UTF8, 0, (LPCSTR)utf8_str.c_str(), -1, wszUnicode, len);
 8     CString ss=wszUnicode;
 9     delete wszUnicode;
10     return ss;
11 }

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3、Ansi转Unicode

 1 std::wstring CodeCovertTool::AnsiToUnicode(const char* buf)  
 2 {//Ansi转Unicode
 3     int len = ::MultiByteToWideChar(CP_ACP, 0, buf, -1, NULL, 0);  
 4     if (len == 0) return L"";  
 5 
 6     std::vector<wchar_t> unicode(len);  
 7     ::MultiByteToWideChar(CP_ACP, 0, buf, -1, &unicode[0], len);  
 8 
 9     return &unicode[0];  
10 }

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4、Unicode转Ansi

 1 std::string CodeCovertTool::UnicodeToAnsi(const wchar_t* buf)  
 2 {//Unicode转Ansi
 3     int len = ::WideCharToMultiByte(CP_ACP, 0, buf, -1, NULL, 0, NULL, NULL);  
 4     if (len == 0) return "";  
 5 
 6     std::vector<char> utf8(len);  
 7     ::WideCharToMultiByte(CP_ACP, 0, buf, -1, &utf8[0], len, NULL, NULL);  
 8 
 9     return &utf8[0];  
10 }

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