这是由于sqlite数据库使用的是UTF-8编码方式,而传入的字符串是ASCII编码或Unicode编码,导致字符串格式错误。解决方案是在调用sqlite接口之前,先将字符串转换成UTF-8编码,以下提供各种字符串编码转换函数。
复制代码代码如下: //UTF-8转Unicode std::wstring Utf82Unicode(const std::string& utf8string) { int wIDesize = ::MultiBytetoWIDeChar(CP_UTF8,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,&resultstring[0],wIDesize); if (convresult != wIDesize) { throw std::exception("La falla!"); } return std::wstring(&resultstring[0]); } //unicode 转为 ascii string WIDeByte2Acsi(wstring& wstrcode) { int ascIISize = ::WIDeCharToMultiByte(CP_OEMCP,wstrcode.c_str(),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,ascIISize,NulL); if (convresult != ascIISize) { throw std::exception("La falla!"); } return std::string(&resultstring[0]); } //utf-8 转 ascii string UTF_82ASCII(string& strUtf8Code) { string strRet(""); //先把 utf8 转为 unicode wstring wstr = Utf82Unicode(strUtf8Code); //最后把 unicode 转为 ascii strRet = WIDeByte2Acsi(wstr); return strRet; } /////////////////////////////////////////////////////////////////////// //ascii 转 Unicode wstring Acsi2WIDeByte(string& strascii) { int wIDesize = MultiBytetoWIDeChar (CP_ACP,(char*)strascii.c_str(),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,wIDesize); if (convresult != wIDesize) { throw std::exception("La falla!"); } return std::wstring(&resultstring[0]); } //Unicode 转 Utf8 std::string Unicode2Utf8(const std::wstring& wIDestring) { int utf8size = ::WIDeCharToMultiByte(CP_UTF8,wIDestring.c_str(),NulL); if (utf8size == 0) { throw std::exception("Error in conversion."); } std::vector<char> resultstring(utf8size); int convresult = ::WIDeCharToMultiByte(CP_UTF8,utf8size,NulL); if (convresult != utf8size) { throw std::exception("La falla!"); } return std::string(&resultstring[0]); } //ascii 转 Utf8 string ASCII2UTF_8(string& strAsciiCode) { string strRet(""); //先把 ascii 转为 unicode wstring wstr = Acsi2WIDeByte(strAsciiCode); //最后把 unicode 转为 utf8 strRet = Unicode2Utf8(wstr); return strRet; } 总结
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