c++实现gbk、utf8编码转换

在c++开发中经常用到的gbk、utf-8编码转换方法。

需要头文件

#include <Windows.h>
#include <string>

using namespace std;

gbk转utf8代码

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;
}

utf8转gbk代码

string Utf8ToGbk(const char *src_str)
{
    int len = MultiByteToWideChar(CP_UTF8, 0, src_str, -1, NULL, 0);
    wchar_t* wszGBK = new wchar_t[len + 1];
    memset(wszGBK, 0, len * 2 + 2);
    MultiByteToWideChar(CP_UTF8, 0, src_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);
    string strTemp(szGBK);
    if (wszGBK) delete[] wszGBK;
    if (szGBK) delete[] szGBK;
    return strTemp;
}