解決C++項目使用sqlite中文亂碼問題

我參考的是這篇文章：https://www.2cto.com/database/201411/354891.html

 

理論是：sqlite使用的是UTF-8，C++中用的字符串是ascii或unicode編碼。

         因此使用時候要進行轉化。插入中文時候要轉化爲UTF-8，讀取時候再轉化回來。

 

下面是轉化函數，參考文章：https://www.2cto.com/database/201411/354891.html

//UTF-8轉Unicode 
    std::wstring Utf82Unicode(const std::string& utf8string) { int widesize = ::MultiByteToWideChar(CP_UTF8, 0, utf8string.c_str(), -1, NULL, 0); if (widesize == ERROR_NO_UNICODE_TRANSLATION) { throw std::exception("Invalid UTF-8 sequence."); } if (widesize == 0) { throw std::exception("Error in conversion."); } std::vector<wchar_t> resultstring(widesize); int convresult = ::MultiByteToWideChar(CP_UTF8, 0, utf8string.c_str(), -1, &resultstring[0], widesize); if (convresult != widesize) { throw std::exception("La falla!"); } return std::wstring(&resultstring[0]); } //unicode 轉爲 ascii 
    std::string WideByte2Acsi(std::wstring& wstrcode){ int asciisize = ::WideCharToMultiByte(CP_OEMCP, 0, wstrcode.c_str(), -1, NULL, 0, NULL, NULL); if (asciisize == ERROR_NO_UNICODE_TRANSLATION) { throw std::exception("Invalid UTF-8 sequence."); } if (asciisize == 0) { throw std::exception("Error in conversion."); } std::vector<char> resultstring(asciisize); int convresult = ::WideCharToMultiByte(CP_OEMCP, 0, wstrcode.c_str(), -1, &resultstring[0], asciisize, NULL, NULL); if (convresult != asciisize) { throw std::exception("La falla!"); } return std::string(&resultstring[0]); } //utf-8 轉 ascii 
    std::string UTF_82ASCII(std::string& strUtf8Code){ using namespace std; string strRet = ""; //先把 utf8 轉爲 unicode 
        wstring wstr = Utf82Unicode(strUtf8Code); //最後把 unicode 轉爲 ascii 
        strRet = WideByte2Acsi(wstr); return strRet; } //ascii 轉 Unicode 
    std::wstring Acsi2WideByte(std::string& strascii){ using namespace std; int widesize = MultiByteToWideChar(CP_ACP, 0, (char*)strascii.c_str(), -1, NULL, 0); if (widesize == ERROR_NO_UNICODE_TRANSLATION) { throw std::exception("Invalid UTF-8 sequence."); } if (widesize == 0) { throw std::exception("Error in conversion."); } std::vector<wchar_t> resultstring(widesize); int convresult = MultiByteToWideChar(CP_ACP, 0, (char*)strascii.c_str(), -1, &resultstring[0], widesize); if (convresult != widesize) { throw std::exception("La falla!"); } return std::wstring(&resultstring[0]); } //Unicode 轉 Utf8 
    std::string Unicode2Utf8(const std::wstring& widestring){ using namespace std; int utf8size = ::WideCharToMultiByte(CP_UTF8, 0, widestring.c_str(), -1, NULL, 0, NULL, NULL); if (utf8size == 0) { throw std::exception("Error in conversion."); } std::vector<char> resultstring(utf8size); int convresult = ::WideCharToMultiByte(CP_UTF8, 0, widestring.c_str(), -1, &resultstring[0], utf8size, NULL, NULL); if (convresult != utf8size) { throw std::exception("La falla!"); } return std::string(&resultstring[0]); } //ascii 轉 Utf8 
    std::string ASCII2UTF_8(std::string& strAsciiCode) { using namespace std; string strRet(""); //先把 ascii 轉爲 unicode 
        wstring wstr = Acsi2WideByte(strAsciiCode); //最後把 unicode 轉爲 utf8 
        strRet = Unicode2Utf8(wstr); return strRet; }

使用效果立竿見影：

能夠看出，以前存進數據庫的是亂碼

改變以後已經成功將漢字存進去了