字符集(编码)转换_Windows

ZC: 来自我的项目 czgj
ZC: (1)、经过测试 MultiByteToWideChar(...) 返回的是 (需要的)WideChar[宽字符]的个数；(2)、WideCharToMultiByte 返回的是 (需要的)Char[窄字符]的个数。
1、代码：
#include "TzEncodingWindows.h"

#ifdef BUILD_IN_WIN32

    #include <QDebug>

    #include <windows.h>

    #include <wchar.h>

    #include <string>

    #include <iostream>

    using namespace std;

#endif// BUILD_IN_WIN32

TzEncodingWindows::TzEncodingWindows()

{

}

TzEncodingWindows::~TzEncodingWindows()

{

}

#ifdef BUILD_IN_WIN32

//*

// ZC: 下面的代码来自网络：// http://www.cnblogs.com/lidabo/p/3903620.html

        // ZC: Ansi-->Unicode

        std::wstring MBytesToWString(const char* lpcszString)

        {

            //int len = strlen(lpcszString);

            int unicodeLen = ::MultiByteToWideChar(CP_ACP, , lpcszString, -, NULL, );

            wchar_t* pUnicode = new wchar_t[unicodeLen + ];

            memset(pUnicode, , (unicodeLen + ) * sizeof(wchar_t));

            ::MultiByteToWideChar(CP_ACP, , lpcszString, -, (LPWSTR)pUnicode, unicodeLen);

            wstring wString = (wchar_t*)pUnicode;

            delete [] pUnicode;

            return wString;

        }

        // ZC: Unicode-->Ansi

        std::string WStringToMBytes(const wchar_t* lpwcszWString)

        {

            char* pElementText;

            int iTextLen;

            // wide char to multi char

            iTextLen = ::WideCharToMultiByte(CP_ACP, , lpwcszWString, -, NULL, , NULL, NULL);

            pElementText = new char[iTextLen + ];

            memset((void*)pElementText, , (iTextLen + ) * sizeof(char));

            ::WideCharToMultiByte(CP_ACP, , lpwcszWString, , pElementText, iTextLen, NULL, NULL);

            std::string strReturn(pElementText);

            delete [] pElementText;

            return strReturn;

        }

        // ZC: Utf8-->Unicode

        std::wstring UTF8ToWString(const char* lpcszString)

        {

            //int len = strlen(lpcszString);

            int unicodeLen = ::MultiByteToWideChar(CP_UTF8, , lpcszString, -, NULL, );

            wchar_t* pUnicode;

            pUnicode = new wchar_t[unicodeLen + ];

            memset((void*)pUnicode, , (unicodeLen + ) * sizeof(wchar_t));

            ::MultiByteToWideChar(CP_UTF8, , lpcszString, -, (LPWSTR)pUnicode, unicodeLen);

            wstring wstrReturn(pUnicode);

            delete [] pUnicode;

            return wstrReturn;

        }

        // ZC: Unicode-->Utf8

        std::string WStringToUTF8(const wchar_t* lpwcszWString)

        {

            char* pElementText;

            int iTextLen = ::WideCharToMultiByte(CP_UTF8, , (LPWSTR)lpwcszWString, -, NULL, , NULL, NULL);

            pElementText = new char[iTextLen + ];

            memset((void*)pElementText, , (iTextLen + ) * sizeof(char));

            ::WideCharToMultiByte(CP_UTF8, , (LPWSTR)lpwcszWString, -, pElementText, iTextLen, NULL, NULL);

            std::string strReturn(pElementText);

            delete [] pElementText;

            return strReturn;

        }

//*/

void TzEncodingWindows::Test_Ansi2Utf8()

{

    qDebug() << "Hello : "+QString::number(sizeof(char));

//*

    char* lpcszString = "50路";

    //::MessageBoxA(0, lpcszString, "MessageBoxA - 1", 0);

    QString str = QString::fromUtf8(lpcszString);

    qDebug() << "lpcszString : "+QString::fromUtf8(lpcszString);

    qDebug() << "str.length() : "+ QString::number(str.length());

    QByteArray byteArr = str.toUtf8();

    qDebug() << "byteArr.length() : "+QString::number(byteArr.length());

    for (int i=; i<byteArr.length(); i++)

    {

        qDebug() << QString::number(i)+" : "+QString::number((int)byteArr.at(i), );

    }

    qDebug() << "strlen(lpcszString) : "+QString::number(strlen(lpcszString));

    int unicodeLen = ::MultiByteToWideChar(CP_UTF8, , lpcszString, -, NULL, );

    qDebug() << "unicodeLen : "+QString::number(unicodeLen);

    wchar_t* pUnicode;

    pUnicode = new wchar_t[unicodeLen + ];

    memset((void*)pUnicode, , (unicodeLen + ) * sizeof(wchar_t));

    ::MultiByteToWideChar(CP_UTF8, , lpcszString, -, (LPWSTR)pUnicode, unicodeLen);

    //::MessageBoxW(0, pUnicode, L"MessageBoxW", 0);

    wchar_t* lpwcszWString = pUnicode;

    ::MessageBoxW(, lpwcszWString, L"MessageBoxW", );

    int iTextLen = ::WideCharToMultiByte(CP_ACP, , lpwcszWString, -, NULL, , NULL, NULL);

    qDebug() << "iTextLen : "+QString::number(iTextLen);

    char* pElementText = new char[iTextLen + ];

    memset((void*)pElementText, , (iTextLen + ) * sizeof(char));

    int iRtn = ::WideCharToMultiByte(

                CP_ACP,

                ,

                lpwcszWString,

                unicodeLen,//0, // ZC: 网页中的这个值，设置的不正确，导致函数返回0，且GetLastError为ERROR_INVALID_PARAMETER。Fuck ！！！

                pElementText,

                iTextLen,

                NULL,

                NULL);

    // ERROR_INVALID_PARAMETER --> 87

    qDebug() << "WideCharToMultiByte return : "+QString::number(iRtn)+" -> GetLastError : "+QString::number(::GetLastError());

    ::MessageBoxA(, pElementText, "MessageBoxA", );

    for (int i=; i<iTextLen; i++)

    {

        qDebug() << QString::number(i)+" --> "+QString::number((int)pElementText[i], );

    }

    std::string strReturn(pElementText);

    qDebug() << "strReturn : " + QString::fromStdString(strReturn);

//    delete [] pUnicode;

//    delete [] pElementText;

//*/

}

#endif// BUILD_IN_WIN32
2、
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字符集(编码)转换_Windows

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