Windows平台下字符串转换（不全）

鄙人在工作中整理的字符转换方法，分享给大家

头文件：MyCharsConvert.h

#pragma once#include <string>class MyCharsConvert{public:MyCharsConvert(void);public:~MyCharsConvert(void);public:// ansi characters convert to unicode 16static std::wstring ANSIToUTF16(std::string AnsiChars);// utf16 to ansistatic std::string UTF16ToANSI(std::wstring Utf16Chars);// utf-8 to ansistatic std::string UTF8ToANSI(std::string utf8Chars);// ansi to utf-8static std::string ANSIToUTF8(std::string ansiChars);private:char* Convert(const char* strIn, int sourceCodepage, int targetCodepage);};

头文件：MyCharsConvert.cpp

#include "StdAfx.h"#include <windows.h>#include "MyCharsConvert.h"MyCharsConvert::MyCharsConvert(void){}MyCharsConvert::~MyCharsConvert(void){}// ansi characters convert to unicode 16std::wstring MyCharsConvert::ANSIToUTF16(std::string ansiChars){//入参检查if (ansiChars.empty()) return std::wstring();wchar_t *pszBuf = NULL;//利用WideCharToMultiByte方法获取需要的大小int needWChar = MultiByteToWideChar(CP_ACP, 0, ansiChars.c_str(), -1, NULL, 0);if (needWChar > 0){pszBuf = new wchar_t[needWChar+1];if (!pszBuf){return std::wstring();}ZeroMemory(pszBuf, (needWChar+1)*sizeof(wchar_t));//窄字符到宽字符的转化MultiByteToWideChar(CP_ACP, 0, ansiChars.c_str(), -1, pszBuf, needWChar);}std::wstring wstrRet(pszBuf);delete[] pszBuf;pszBuf = NULL;return wstrRet;}std::string MyCharsConvert::UTF16ToANSI(std::wstring utf16Chars){//入参检查if (utf16Chars.empty()) return std::string();char *pszBuf = NULL;//利用WideCharToMultiByte方法获取需要的大小int needBytes = WideCharToMultiByte(CP_ACP, 0, utf16Chars.c_str(), -1, NULL, 0, NULL, NULL);if (needBytes > 0){pszBuf = new char[needBytes+1];if (!pszBuf){return std::string("");}ZeroMemory(pszBuf, (needBytes+1)*sizeof(char));//宽字符到窄字符的转化WideCharToMultiByte(CP_ACP, 0, utf16Chars.c_str(), -1, pszBuf, needBytes, NULL, NULL);}std::string strRet(pszBuf);delete[] pszBuf;pszBuf = NULL;return strRet;}// utf-8 to ansistd::string MyCharsConvert::UTF8ToANSI(std::string utf8Chars){char* pszRet = Convert(utf8Chars.c_str(), CP_UTF8, CP_ACP); if (NULL == pszRet){return std::string("");}std::string strRet(pszRet);delete[] pszRet;pszRet = NULL;return strRet;}// ansi to utf-8std::string MyCharsConvert::ANSIToUTF8(std::string ansiChars){char* pszRet = Convert(ansiChars.c_str(),CP_ACP,CP_UTF8); if (NULL == pszRet){return std::string("");}std::string strRet(pszRet);delete[] pszRet;pszRet = NULL;return strRet;}/***@brief 字符转换*利用线程ThreadFunc来获取POST请求返回的数据*@param [in] sourceCodepage输入strIn的字符集*@param [in] targetCodepage输出目标的字符集*@return strIn对应的targetCodepage字符串*@warning Convert返回值是char*，需要调用者用完返回的结果后，手动delete Convert的返回值*/char* MyCharsConvert::Convert(const char* strIn, int sourceCodepage, int targetCodepage){///1.获取strIn的字符长度int len=strlen(strIn);///2.获取strIn字符到unicode字符集所需要的长度int unicodeLen=MultiByteToWideChar(sourceCodepage,0,strIn,-1,NULL,0);wchar_t* pUnicode = NULL;///3.申请对应长度的wchar_t字符串pUnicode=new wchar_t[unicodeLen+1];if (NULL == pUnicode){return NULL;}memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t));///4.将strIn转换成Unicode字符集MultiByteToWideChar(sourceCodepage,0,strIn,-1,(LPWSTR)pUnicode,unicodeLen);BYTE * pTargetData = NULL;///5.获取从Unicode字符集到targetCodepage所需要的长度int targetLen=WideCharToMultiByte(targetCodepage,0,(LPWSTR)pUnicode,-1,(char *)pTargetData,0,NULL,NULL);///6.申请对应长度的内存pTargetData=new BYTE[targetLen+1];if (NULL == pTargetData){return NULL;}memset(pTargetData,0,targetLen+1);///7.实现到targetCodepage字符集的转换WideCharToMultiByte(targetCodepage,0,(LPWSTR)pUnicode,-1,(char *)pTargetData,targetLen,NULL,NULL);//strcpy(strOut,(char*)pTargetData);delete[] pUnicode;///8.返回转换的结果return (char*)pTargetData;}