windows 下UNICODE 多字节和utf-8相互转化

来源：互联网发布：鸿业造价软件编辑：程序博客网时间：2024/06/05 17:41

很多时候我们需要UNICODE，utf-8和ascii相互转化，windows提供了相关api但是不是特别好用，很多时候还会出错，封装一份自己的字符转化函数，使用的时候就不用那么麻烦了，需要的时候，直接调用就好。

#pragma onceclass CConvertChar{public:    CConvertChar() = default;    ~CConvertChar();public:    static int UnicodeToAnsi(LPSTR szAnsi,LPCWSTR wstrUnicode);    static int AnsiToUnicode(LPWSTR wstrUnicode, LPCSTR szAnsi);    static int UTF8ToUnicode(LPWSTR wstrUnicoe, LPCSTR szUTF8);    static int UnicodeToUTF8(LPSTR szUTF8, LPCWSTR wszUnicode);};

CConvertChar::~CConvertChar(){}int CConvertChar::UnicodeToAnsi(LPSTR szAnsi, LPCWSTR wstrUnicode){    DWORD dwMinSize = 0;    //转化后需要多少多字节来存储    dwMinSize = WideCharToMultiByte(CP_OEMCP, 0, wstrUnicode, -1, NULL, 0, NULL, FALSE);    if (0 == dwMinSize)    {        return 0;    }    WideCharToMultiByte(CP_OEMCP, 0,wstrUnicode, -1, szAnsi, dwMinSize, NULL, FALSE);    return dwMinSize;}int CConvertChar::AnsiToUnicode(LPWSTR wstrUnicode, LPCSTR szAnsi){    DWORD dwMinSize = 0;    dwMinSize = MultiByteToWideChar(CP_ACP, 0, szAnsi, -1, NULL, 0);    if (0 == dwMinSize)    {        return 0;    }    MultiByteToWideChar(CP_ACP, 0,szAnsi, -1,wstrUnicode, dwMinSize);    return dwMinSize;}int CConvertChar::UTF8ToUnicode(LPWSTR wstrUnicoe, LPCSTR szUTF8){    //转换后Unicode的长度      DWORD dwMinSize = MultiByteToWideChar(CP_UTF8, 0, szUTF8, -1, NULL, 0);    if (0 != dwMinSize)    {        //转为Unicode          dwMinSize = MultiByteToWideChar(CP_UTF8, 0, szUTF8, -1, wstrUnicoe, dwMinSize);        return dwMinSize;    }    return 0;}int CConvertChar::UnicodeToUTF8(LPSTR szUTF8, LPCWSTR wszUnicode){    int dwMinSize = WideCharToMultiByte(CP_UTF8, 0, wszUnicode, -1, NULL, 0, NULL, NULL);    if (dwMinSize)    {        dwMinSize = WideCharToMultiByte(CP_UTF8, 0, wszUnicode, -1, szUTF8,dwMinSize,NULL,NULL);    }    return dwMinSize;}

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