1. UTF-8转Unicode
    3. std::wstring Utf82Unicode(const std::string& utf8string) 
    4. { 
    5.     int widesize = ::MultiByteToWideChar(CP_UTF8, 0, utf8string.c_str(), -1, NULL, 0); 
    6.     if (widesize == ERROR_NO_UNICODE_TRANSLATION) 
    7.     { 
    8.         throw std::exception("Invalid UTF-8 sequence."); 
    9.     } 
    10.     if (widesize == 0) 
    11.     { 
    12.         throw std::exception("Error in conversion."); 
    13.     } 
    14.     std::vector<wchar_t> resultstring(widesize); 
    15.     int convresult = ::MultiByteToWideChar(CP_UTF8, 0, utf8string.c_str(), -1, &resultstring[0], widesize); 
    16.     if (convresult != widesize) 
    17.     { 
    18.         throw std::exception("La falla!"); 
    19.     } 
    20.     return std::wstring(&resultstring[0]); 
    21. } 
    24. Unicode 转为 Ascii
    26. string WideByte2Acsi(wstring& wstrcode) 
    27. { 
    28.     int asciisize = ::WideCharToMultiByte(CP_OEMCP, 0, wstrcode.c_str(), -1, NULL, 0, NULL, NULL); 
    29.     if (asciisize == ERROR_NO_UNICODE_TRANSLATION) 
    30.     { 
    31.         throw std::exception("Invalid UTF-8 sequence."); 
    32.     } 
    33.     if (asciisize == 0) 
    34.     { 
    35.         throw std::exception("Error in conversion."); 
    36.     } 
    37.     std::vector<char> resultstring(asciisize); 
    38.     int convresult =::WideCharToMultiByte(CP_OEMCP, 0, wstrcode.c_str(), -1, &resultstring[0], asciisize, NULL, NULL); 
    39.     if (convresult != asciisize) 
    40.     { 
    41.         throw std::exception("La falla!"); 
    42.     } 
    43.     return std::string(&resultstring[0]); 
    44. }
    47. UTF-8 转 Ascii
    48. string UTF_82ASCII(string& strUtf8Code) 
    49. { 
    50.     string strRet(""); 
    51.     //先把 utf8 转为 unicode 
    52.     wstring wstr = Utf82Unicode(strUtf8Code); 
    53.     //最后把 unicode 转为 ascii 
    54.     strRet = WideByte2Acsi(wstr); 
    55.     return strRet; 
    56. }
    59.  Ascii 转 Unicode
    60. wstring Acsi2WideByte(string& strascii)
    61. {
    62.     int widesize = MultiByteToWideChar(CP_ACP, 0, (char*)strascii.c_str(), -1, NULL, 0);
    63.     if (widesize == ERROR_NO_UNICODE_TRANSLATION)
    64.     {
    65.         throw std::exception("Invalid UTF-8 sequence.");
    66.     }
    67.     if (widesize == 0)
    68.     {
    69.         throw std::exception("Error in conversion.");
    70.     }
    71.     std::vector<wchar_t> resultstring(widesize);
    72.     int convresult = MultiByteToWideChar(CP_ACP, 0, (char*)strascii.c_str(), -1, &resultstring[0], widesize);
    73.     if (convresult != widesize)
    74.     {
    75.         throw std::exception("La falla!");
    76.     }
    77.     return std::wstring(&resultstring[0]);
    78. }
    81. Unicode 转 UTF8
    82. std::string Unicode2Utf8(std::wstring& widestring) 
    83. {
    84.     using namespace std;
    85.     int utf8size = ::WideCharToMultiByte(CP_UTF8, 0, widestring.c_str(), -1, NULL, 0, NULL, NULL);
    86.     if (utf8size == 0)
    87.     {
    88.         throw std::exception("Error in conversion.");
    89.     }
    90.     std::vector<char> resultstring(utf8size);
    91.     int convresult = ::WideCharToMultiByte(CP_UTF8, 0, widestring.c_str(), -1, &resultstring[0], utf8size, NULL, NULL);
    92.     if (convresult != utf8size)
    93.     {
    94.         throw std::exception("La falla!");
    95.     }
    96.     return std::string(&resultstring[0]);
    97. }
    99. ————————————————
    100. 版权声明：本文为CSDN博主「Just_like_fire」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
    101. 原文链接：https://blog.csdn.net/Leo_csdn_/article/details/100761644