用C++ 对中文进行UTF-8编解码

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#include <windows.h>#include <stdio.h>#include <iostream>#include <string>

string UTF8_URL_DECODE(string URLcode);

stringUTF8_URL_ENCODE(char*Chinese);

string UTF8_URL_DECODE(string URLcode)

    //utf-8-> unicode-> 中文

    int len = strlen(URLcode.c_str());

    char* temps = new char[len + 1];

    temps[len] = '\0';

    int temps_pos = 0;

    //去掉%号

    for (int i = 0; i < len; ++i)

        if (URLcode[i] != '%')

            temps[temps_pos] = URLcode[i];

            temps_pos++;

    temps[temps_pos] = '\0';

  //  cout << temps << endl;

    int temps_len = strlen(temps);

    int UTF8len = temps_len / 2;

    char* UTF8str = new char[UTF8len + 1];

    UTF8str[UTF8len] = '\0';

    //把字符转换成数字，得到真实的UTF8串

    for (int i = 0; i < UTF8len * 2;)

        char convert[3] = { 0 };

        convert[0] = temps[i++];

        convert[1] = temps[i++];

        char *end;

        int tempint = strtol(convert, &end, 16);

        UTF8str[i / 2 - 1] = tempint;

    //UTF8转换到UTF16

    int wcslen = ::MultiByteToWideChar(CP_UTF8, NULL, UTF8str, UTF8len, NULL, 0);

    wchar_t* wszString = new wchar_t[wcslen + 1];

    ::MultiByteToWideChar(CP_UTF8, NULL, UTF8str, UTF8len, wszString, wcslen);

    wszString[wcslen] = L'\0';

    //设置区域

    std::wcout.imbue(std::locale("CHS"));

//    wcout << wszString << endl;

    //把wstring 转为 string

    wstring DecodeStr = wszString;

    string OutStr;

    int nLen = (int)DecodeStr.length() *2;

    OutStr.resize(nLen, ' ');

    WideCharToMultiByte(CP_ACP, 0, (LPCWSTR)DecodeStr.c_str(), nLen, (LPSTR)OutStr.c_str(), nLen, NULL, NULL);

    delete[]temps;

    delete[]UTF8str;

    delete[] wszString;

    return OutStr;

//中文 转为 utf-8

string UTF8_URL_ENCODE(char*Chinese)

    //中文 -> unicode  -> utf-8

    wchar_t unicode[128] = { 0 };

    MultiByteToWideChar(CP_ACP, 0, Chinese, strlen(Chinese), unicode, 128);

    unsigned char sz[128] = { 0 };

    WideCharToMultiByte(CP_UTF8, 0, unicode, wcslen(unicode), (LPSTR)sz, 128, 0, 0);

    string EncodeStr;

    char SrcStr[128] = { 0 };

    for (int i = 0; i < 128; i++)

        if (sz[i] != NULL)

            sprintf_s(SrcStr, "%%%X", sz[i]);

            EncodeStr += SrcStr;

    transform(EncodeStr.begin(), EncodeStr.end(), EncodeStr.begin(), tolower);

    return EncodeStr;

int main(int argc, char *argv[])

{

    string Encode_Str;

    Encode_Str = UTF8_URL_ENCODE("苏BAA345", 128);

    cout << Encode_Str << endl;

    string Decode_Str = UTF8_URL_DECODE(Encode_Str);

    cout  << Decode_Str << endl;

return 0;

}

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