string和wstring之间转换的三种方法

阳光穿透心脏的1/2处 2022-09-03 01:18 331阅读 0赞

方法1

#include <string>
    #include <locale>
    #include <codecvt>
    
    //convert string to wstring
    inline std::wstring to_wide_string(const std::string& input)
    {
    	std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
    	return converter.from_bytes(input);
    }
    
    //convert wstring to string 
    inline std::string to_byte_string(const std::wstring& input)
    {
    	std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
    	return converter.to_bytes(input);
    }

方法2

#include <Windows.h>
    //将string转换成wstring  
    wstring string2wstring(string str)  
    {  
        wstring result;  
        //获取缓冲区大小，并申请空间，缓冲区大小按字符计算  
        int len = MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), NULL, 0);  
        TCHAR* buffer = new TCHAR[len + 1];  
        //多字节编码转换成宽字节编码  
        MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), buffer, len);  
        buffer[len] = '\0';             //添加字符串结尾  
        //删除缓冲区并返回值  
        result.append(buffer);  
        delete[] buffer;  
        return result;  
    }  
    
    //将wstring转换成string  
    string wstring2string(wstring wstr)  
    {  
        string result;  
        //获取缓冲区大小，并申请空间，缓冲区大小事按字节计算的  
        int len = WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), NULL, 0, NULL, NULL);  
        char* buffer = new char[len + 1];  
        //宽字节编码转换成多字节编码  
        WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), buffer, len, NULL, NULL);  
        buffer[len] = '\0';  
        //删除缓冲区并返回值  
        result.append(buffer);  
        delete[] buffer;  
        return result;  
    }

方法3

#include <comutil.h>  
    #pragma comment(lib, "comsuppw.lib")
    
    string ws2s(const wstring& ws)
    {
        _bstr_t t = ws.c_str();  
        char* pchar = (char*)t;  
        string result = pchar;  
        return result;  
    }
    
    wstring s2ws(const string& s)
    {
        _bstr_t t = s.c_str();  
        wchar_t* pwchar = (wchar_t*)t;  
        wstring result = pwchar;  
        return result; 
    }

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姊妹篇：

QString与char \*之间的完美转换，支持含有中文字符的情况

[https://libaineu2004.blog.csdn.net/article/details/38388617][https_libaineu2004.blog.csdn.net_article_details_38388617]

[https_libaineu2004.blog.csdn.net_article_details_38388617]: https://libaineu2004.blog.csdn.net/article/details/38388617