GBK转UTF8编码-UTF8转GBK编码(C++)

2014/09/13

版本一：string,GBK转UTF8，UTF8转GBK

#include &lt;iostream&gt;
#include "tchar.h"
#include &lt;string&gt;
#include &lt;windows.h&gt; 
using namespace std;

string GBKToUTF8(const std::string &amp; 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 &amp; 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 = "C/C++程序员之家 - 关注cplusplus,关注互联网,关注路由与交换.程序员的历程.";
	cout&lt;&lt;test&lt;&lt;endl;
	cout&lt;&lt;GBKToUTF8(test)&lt;&lt;endl; //转为UTF8
	cout&lt;&lt;UTF8ToGBK(GBKToUTF8(test))&lt;&lt;endl; //转为UTF8再转为GBK
	return 0;
}

#include <iostream>

#include "tchar.h"

#include <string>

#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 = "C/C++程序员之家 - 关注cplusplus,关注互联网,关注路由与交换.程序员的历程.";

cout<<test<<endl;

cout<<GBKToUTF8(test)<<endl; //转为UTF8

cout<<UTF8ToGBK(GBKToUTF8(test))<<endl; //转为UTF8再转为GBK

return 0;

}

版本二：CString，GBK转UTF8，UTF8转GBK

CString UTF8ToGB(CString &amp; str)
{
	CString szOut;
    WCHAR *strSrc;
    TCHAR *szRes;
    int i = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
    strSrc = new WCHAR[i+1];
    MultiByteToWideChar(CP_UTF8, 0, str, -1, strSrc, i);
    i = WideCharToMultiByte(CP_ACP, 0, strSrc, -1, NULL, 0, NULL, NULL);
    szRes = new TCHAR[i+1];
    WideCharToMultiByte(CP_ACP, 0, strSrc, -1, szRes, i, NULL, NULL);
    szOut = szRes;
    delete []strSrc;
    delete []szRes;
	return szOut;
}  

CString GBKToUTF8(CString &amp; strGBK)
{
	CString strOutUTF8 = "";
	WCHAR * str1;
	int n = MultiByteToWideChar(CP_ACP, 0, strGBK, -1, NULL, 0);
	str1 = new WCHAR[n];
	MultiByteToWideChar(CP_ACP, 0, strGBK, -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;
}

CString UTF8ToGB(CString & str)

{

CString szOut;

WCHAR *strSrc;

TCHAR *szRes;

int i = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);

strSrc = new WCHAR[i+1];

MultiByteToWideChar(CP_UTF8, 0, str, -1, strSrc, i);

i = WideCharToMultiByte(CP_ACP, 0, strSrc, -1, NULL, 0, NULL, NULL);

szRes = new TCHAR[i+1];

WideCharToMultiByte(CP_ACP, 0, strSrc, -1, szRes, i, NULL, NULL);

szOut = szRes;

delete []strSrc;

delete []szRes;

return szOut;

}

CString GBKToUTF8(CString & strGBK)

{

CString strOutUTF8 = "";