windows平台下微软的库自带了一些api可用于几种编码格式间的互相转码,其实可以用一个iconv开源跨平台的转码库,那个方法更方便且统一。
使用前要引入头文件和命名空间
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- #include <iostream>
- #include <string>
- #include <fstream>
- #include <windows.h>
- using namespace std;
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- string GBKToUTF8(std::string& strGBK)
- {
- string strOutUTF8 = "";
- WCHAR * str1;
- int n = MultiByteToWideChar(CP_ACP, 0, strGBK.c_str(), -1, NULL, 0);
- str1 = new WCHAR[n];
- MultiByteToWideChar(CP_ACP, 0, strGBK.c_str(), -1, str1, n);
- n = WideCharToMultiByte(CP_UTF8, 0, str1, -1, NULL, 0, NULL, NULL);
- char * str2 = new char[n];
- WideCharToMultiByte(CP_UTF8, 0, str1, -1, str2, n, NULL, NULL);
- strOutUTF8 = str2;
- delete[]str1;
- str1 = NULL;
- delete[]str2;
- str2 = NULL;
- return strOutUTF8;
- }
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- string UTF8ToGBK(const std::string& strUTF8)
- {
- int len = MultiByteToWideChar(CP_UTF8, 0, strUTF8.c_str(), -1, NULL, 0);
- unsigned short * wszGBK = new unsigned short[len + 1];
- memset(wszGBK, 0, len * 2 + 2);
- MultiByteToWideChar(CP_UTF8, 0, (LPCTSTR)strUTF8.c_str(), -1, wszGBK, len);
- len = WideCharToMultiByte(CP_ACP, 0, wszGBK, -1, NULL, 0, NULL, NULL);
- char *szGBK = new char[len + 1];
- memset(szGBK, 0, len + 1);
- WideCharToMultiByte(CP_ACP,0, wszGBK, -1, szGBK, len, NULL, NULL);
- //strUTF8 = szGBK;
- std::string strTemp(szGBK);
- delete[]szGBK;
- delete[]wszGBK;
- return strTemp;
- }
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- void UnicodeToUTF8(wchar_t* strW, char szUtf8[])
- {
- #ifdef _MSC_VER
- char* pElementText;
- int nTextLen;
- nTextLen = WideCharToMultiByte(
- CP_UTF8, // code page
- 0, // performance and mapping flags
- strW, // wide-character string
- -1, // number of chars in string.
- NULL, // buffer for new string
- 0, // size of buffer
- NULL, // default for unmappable chars
- NULL // set when default char used
- );
- pElementText = new char[nTextLen+1];
- memset((void *)pElementText,0,sizeof(char)* (nTextLen+1));
- WideCharToMultiByte(
- CP_UTF8, // code page
- 0, // performance and mapping flags
- strW, // wide-character string
- -1, // number of chars in string.
- pElementText, // buffer for new string
- nTextLen, // size of buffer
- NULL, // default for unmappable chars
- NULL // set when default char used
- );
- sprintf_s(szUtf8, nTextLen, "%s", pElementText);
- delete[] pElementText;
- return ;
- #endif
- }
使用举例:
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- string test("源编码格式需要转成目标编码格式");
- fstream output("test.txt"); //输出到文件
- output << GBKToUTF8(test);
一般来说utf8用的比较多,推荐都转成utf8
http://blog.csdn.net/u012234115/article/details/42292035
时间: 2024-10-23 18:15:28