GBK转UTF-8示例

GbkToUtf8.cpp

#include 
     
      #include 
      
       #include 
       
        #include 
        
         int main(){    using namespace std;    string multiByteString = "我25岁。\nI'm 25 years old.";    int bufferSize = MultiByteToWideChar(CP_ACP, 0, multiByteString.c_str(), -1, nullptr, 0);    WCHAR *unicodeString = new WCHAR[bufferSize];    MultiByteToWideChar(CP_ACP, 0, multiByteString.c_str(), -1, unicodeString, bufferSize);    bufferSize = WideCharToMultiByte(CP_UTF8, 0, unicodeString, -1, nullptr, 0, nullptr, nullptr);    CHAR *utf8String = new CHAR[bufferSize];    WideCharToMultiByte(CP_UTF8, 0, unicodeString, -1, utf8String, bufferSize, nullptr, nullptr);    ofstream ofs("UTF8.txt");    if (ofs)    {        ofs.write(utf8String, bufferSize - 1);        cout << "A UTF-8 string has been written to file: UTF8.txt" << endl;    }    else    {        cout << "Cannot create file: UTF8.txt" << endl;    }    delete[] utf8String;    delete[] unicodeString;    system("pause");    return 0;}
        
       
      
     

UTF-8转GBK示例

Utf8ToGbk.c

#include 
     
      #include 
      
       #define BUFFER_SIZE 1000int main(){    const char *inputFilename = "Utf8Text.txt";    FILE *inputFile = fopen(inputFilename, "r");    if (inputFile)    {        char utf8Text[BUFFER_SIZE];        size_t numberOfObjectsRead = fread(utf8Text, sizeof(char), BUFFER_SIZE, inputFile);        utf8Text[numberOfObjectsRead] = '\0';        int bufferSize = MultiByteToWideChar(CP_UTF8, 0, utf8Text, -1, NULL, 0);        WCHAR *unicodeString = (WCHAR *)malloc(sizeof(WCHAR) * bufferSize);        MultiByteToWideChar(CP_UTF8, 0, utf8Text, -1, unicodeString, bufferSize);        bufferSize = WideCharToMultiByte(CP_ACP, 0, unicodeString, -1, NULL, 0, NULL, NULL);        CHAR *gbkString = (CHAR *)malloc(sizeof(CHAR) * bufferSize);        WideCharToMultiByte(CP_ACP, 0, unicodeString, -1, gbkString, bufferSize, NULL, NULL);        const char *outputFilename = "GbkText.txt";        FILE *outputFile = fopen(outputFilename, "w");        if (outputFile)        {            fwrite(gbkString, sizeof(CHAR), bufferSize - 1, outputFile);            fclose(outputFile);            printf("The GBK text has been written to file: %s\n", outputFilename);        }        else        {            printf("Cannot write file: %s\n", outputFilename);        }        free(gbkString);        free(unicodeString);        fclose(inputFile);    }    else    {        printf("Cannot read file: %s\n", inputFilename);    }    system("pause");    return 0;}
      
     

以下是我对转换过程的封装

EncodingConverter.h

#pragma once#include 
     
      #include 
      
       class EncodingConverter{public:    EncodingConverter(UINT fromCodePage, UINT toCodePage);    std::string convert(const std::string &from) const;    static std::wstring convertToUnicode(UINT fromCodePage, const std::string &from);    static std::string unicodeConvertTo(UINT toCodePage, const std::wstring &from);private:    UINT fromCodePage;    UINT toCodePage;};
      
     

EncodingConverter.cpp

#include "EncodingConverter.h"EncodingConverter::EncodingConverter(UINT fromCodePage, UINT toCodePage) : fromCodePage(fromCodePage), toCodePage(toCodePage) { }std::string EncodingConverter::convert(const std::string &from) const{    int bufferSize = MultiByteToWideChar(fromCodePage, 0, from.c_str(), -1, nullptr, 0);    WCHAR *unicodeString = new WCHAR[bufferSize];    MultiByteToWideChar(fromCodePage, 0, from.c_str(), -1, unicodeString, bufferSize);    bufferSize = WideCharToMultiByte(toCodePage, 0, unicodeString, -1, nullptr, 0, nullptr, nullptr);    CHAR *to = new CHAR[bufferSize];    WideCharToMultiByte(toCodePage, 0, unicodeString, -1, to, bufferSize, nullptr, nullptr);    std::string toString(to);    delete[] to;    delete[] unicodeString;    return toString;}std::wstring EncodingConverter::convertToUnicode(UINT fromCodePage, const std::string &from){    int bufferSize = MultiByteToWideChar(fromCodePage, 0, from.c_str(), -1, nullptr, 0);    WCHAR *unicodeString = new WCHAR[bufferSize];    MultiByteToWideChar(fromCodePage, 0, from.c_str(), -1, unicodeString, bufferSize);    std::wstring toString(unicodeString);    delete[] unicodeString;    return toString;}std::string EncodingConverter::unicodeConvertTo(UINT toCodePage, const std::wstring &from){    int bufferSize = WideCharToMultiByte(toCodePage, 0, from.c_str(), -1, nullptr, 0, nullptr, nullptr);    CHAR *to = new CHAR[bufferSize];    WideCharToMultiByte(toCodePage, 0, from.c_str(), -1, to, bufferSize, nullptr, nullptr);    std::string toString(to);    delete[] to;    return toString;}

EncodingConversionDemo.cpp

#include 
     
      #include "EncodingConverter.h"using namespace std;int main(){    const string &utf8String = EncodingConverter(CP_ACP, CP_UTF8).convert("Are you OK? -- 你还好吗");    cout << utf8String << endl;    const string &gbkString = EncodingConverter(CP_UTF8, CP_ACP).convert("浣犺繕濂藉悧");    cout << gbkString << endl;    const wstring &unicodeString = EncodingConverter::convertToUnicode(CP_UTF8, "浣犺繕濂藉悧");    wcout.imbue(locale("chs"));    wcout << unicodeString << endl;    cout << EncodingConverter::unicodeConvertTo(CP_ACP, wstring(L"别笑青蛙没有见过大海，在河边一样可以自由自在。")) << endl;    system("pause");    return 0;}