字符编码转换

gbk->utf-8
C++ UTF-8和GBK的转换

#include <windows.h>
string GbkToUtf8(string src_str)
{

	int len = MultiByteToWideChar(CP_ACP, 0, src_str.c_str(), -1, NULL, 0);
	wchar_t* wstr = new wchar_t[len + 1];
	memset(wstr, 0, len + 1);
	MultiByteToWideChar(CP_ACP, 0, src_str.c_str(), -1, wstr, len);
	len = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL);
	char* str = new char[len + 1];
	memset(str, 0, len + 1);
	WideCharToMultiByte(CP_UTF8, 0, wstr, -1, str, len, NULL, NULL);
	string strTemp = str;
	if (wstr) delete[] wstr;
	if (str) delete[] str;
	return strTemp;
}

整个字符串转换
C++中字符编码的转换(Unicode、UTF-8、ANSI)

std::string UnicodeToUTF8(const std::wstring & wstr)
{
    std::string ret;
    try {
        std::wstring_convert< std::codecvt_utf8<wchar_t> > wcv;
        ret = wcv.to_bytes(wstr);
    } catch (const std::exception & e) {
        std::cerr << e.what() << std::endl;
    }
    return ret;
}
std::wstring UTF8ToUnicode(const std::string & str)
{
    std::wstring ret;
    try {
        std::wstring_convert< std::codecvt_utf8<wchar_t> > wcv;
        ret = wcv.from_bytes(str);
    } catch (const std::exception & e) {
        std::cerr << e.what() << std::endl;
    }
    return ret;
}

标签：std,编码,转换,string,字符,len,wstr,str,NULL
来源： https://blog.csdn.net/p_eng_s_hen/article/details/117868746