字符集GBK到UTF8的转换

http://bbs.csdn.net/topics/390196457

#include <iostream>#include <string>#include <Windows.h>using namespace std;string GBKToUTF8(const 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;}string strXml = "<?xml version=\"1.0\">\n\<Action>\n\\t<Variable>这是一个测试</Variable>\n\\t<Query>\n\\t\t<Address>阿防盗斯</Address>\n\\t</Query>\n\</Action>\n";int main(){cout << strXml << endl;cout << "\n---------------------------------\n" << endl;cout << GBKToUTF8(strXml) << endl;return 0;}

http://bbs.csdn.net/topics/390196457

iconv是跨平台的，windows，linux...都可以用

#include <iconv.h>#pragma comment(lib,"iconv.lib") int code_convert(char *from_charset,char *to_charset,const char *inbuf, size_t inlen,char *outbuf, size_t outlen){         iconv_t cd;         const char **pin = &inbuf;         char **pout = &outbuf;          cd = iconv_open(to_charset,from_charset);         if (cd==0) return -1;         memset(outbuf,0,outlen);         if (iconv(cd, pin, &inlen,pout, &outlen)==-1) return -1;         iconv_close(cd);         return 0;} /* UTF-8 to GBK  */int u2g(const char *inbuf, size_t inlen, char *outbuf, size_t outlen){         return code_convert("UTF-8","GBK",inbuf,inlen,outbuf,outlen);} /* GBK to UTF-8 */int g2u(const char *inbuf, size_t inlen, char *outbuf, size_t outlen){         return code_convert("GBK", "UTF-8", inbuf, inlen, outbuf, outlen);}

http://blog.csdn.net/p569354158/article/details/6567175

#include <iostream>#include <string>#include <fstream>#include <windows.h> using namespace std;string GBKToUTF8(const 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;}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;}int _tmain(int argc, _TCHAR* argv[]){string test("我们中国是个强大的名族，强大的动力来自每个人的支持");fstream output("test.txt",ios_base::out | ios_base::app);output << GBKToUTF8(test);//system("iconv -f GBK -t utf-8");return 0;}