封装ANSI,UNICODE,UTF8互相转换类

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Ansi22Utf8.h#pragma once#include <string>#include <vector>using namespace std;class Ansi22Utf8{public:Ansi22Utf8(void);~Ansi22Utf8(void);private:wchar_t* AnsiToUnicode(const char* buf);char* UnicodeToUtf8(const wchar_t* buf);wchar_t * UTF8ToUnicode( const char* str );char * UnicodeToANSI( const wchar_t *str );public:char* UTF8ToANSI(const char* buf);char* AnsiToUtf8(const char* buf);};Ansi22Utf8.cpp#include "StdAfx.h"#include "Ansi22Utf8.h"#include <Windows.h>Ansi22Utf8::Ansi22Utf8(void){}Ansi22Utf8::~Ansi22Utf8(void){}//UTF8转成Unicodewchar_t * Ansi22Utf8::UTF8ToUnicode( const char* str ){      int    textlen = 0;      wchar_t * result;      textlen = MultiByteToWideChar( CP_UTF8, 0, str,-1,    NULL,0 );        result = (wchar_t *)malloc((textlen+1)*sizeof(wchar_t));        memset(result,0,(textlen+1)*sizeof(wchar_t));        MultiByteToWideChar(CP_UTF8, 0,str,-1,(LPWSTR)result,textlen );        return    result;  }//Unicode转成ANSIchar * Ansi22Utf8::UnicodeToANSI( const wchar_t *str ){      char * result;      int textlen = 0;      // wide char to multi char      textlen = WideCharToMultiByte( CP_ACP,    0,    str,    -1,    NULL, 0, NULL, NULL );      result =(char *)malloc((textlen+1)*sizeof(char));      memset( result, 0, sizeof(char) * ( textlen + 1 ) );      WideCharToMultiByte( CP_ACP, 0, str, -1, result, textlen, NULL, NULL );      return result;}char* Ansi22Utf8::UTF8ToANSI(const char* buf){return UnicodeToANSI(UTF8ToUnicode(buf));}//ANSI转成Unicodewchar_t* Ansi22Utf8::AnsiToUnicode(const char* buf){int textlen = 0;wchar_t* result;textlen = MultiByteToWideChar(CP_ACP,0,buf,-1,NULL,0);result = (wchar_t *)malloc((textlen+1)*sizeof(wchar_t));memset(result,0,(textlen+1)*sizeof(wchar_t));MultiByteToWideChar(CP_ACP, 0,buf,-1,(LPWSTR)result,textlen );return result; }//Unicode转成UTF8char* Ansi22Utf8::UnicodeToUtf8(const wchar_t* buf){char* result;int textlen = 0;textlen = WideCharToMultiByte( CP_UTF8, 0, buf, -1, NULL, 0, NULL, NULL );result =(char *)malloc((textlen+1)*sizeof(char));memset(result, 0, sizeof(char) * ( textlen + 1 ) );WideCharToMultiByte( CP_UTF8, 0, buf, -1, result, textlen, NULL, NULL );return result; }char* Ansi22Utf8::AnsiToUtf8(const char* szAnsi){/* if (szAnsi == NULL)        return NULL ;        _bstr_t   bstrTmp (szAnsi) ;    int       nLen = ::WideCharToMultiByte (CP_UTF8, 0, (LPCWSTR)bstrTmp, -1, NULL, 0, NULL, NULL) ;    char      * pUTF8 = new char[nLen+1] ;    ZeroMemory (pUTF8, nLen + 1) ;    ::WideCharToMultiByte (CP_UTF8, 0, (LPCWSTR)bstrTmp, -1, pUTF8, nLen, NULL, NULL) ;    return pUTF8 ;*/return UnicodeToUtf8(AnsiToUnicode(szAnsi));}
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