C++复制文件

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这里我将复制文件操作封装成一个接口,具体函数可以去查阅MSDN,相信你看过我这篇博客后,基本上关于文件的删除,拷贝,移动,改名都能顺利完成,因为他们用的是同一个函数:)

我这个接口不需要传具体的文件名字,只需传存放该文件的目录即可,当然你也可以通过该博客改写接口

先定义两个返回值类型

#define TRUE 0
#define FALSE 1

int CopyORBackUpFiles(string strFromPath,string strToPath)
{
	//判断一个路径下文件夹是否存在
	BOOL rec = PathFileExistsA(strFromPath.c_str());
	if (0 ==rec)
	{
		return FALSE;
	}

	//查找文件是否存在
	strFromPath+="\\";
	string strFilesPath = strFromPath;
	strFromPath+="*.*";

	//替换文件路径
	strToPath+="\\";

	WIN32_FIND_DATA longFile;//定义文件信息结构体

	HANDLE HFileHandle = FindFirstFileA(strFromPath.c_str(),(LPWIN32_FIND_DATAA)&longFile);
	if (INVALID_HANDLE_VALUE == HFileHandle)
	{
		cout << GetLastError() << endl;
	}
	do 
	{
		if(strcmp((char *)longFile.cFileName,".") == 0 || strcmp((char *)longFile.cFileName,"..") == 0)
		{
			continue;
		}

		//wcout << longFile_1.cFileName << endl;
		//WIN32_FIND_DATA结构体中为Wchar,转为char
		int len = wcslen(longFile.cFileName);
		int ichar = WideCharToMultiByte(CP_ACP,0,longFile.cFileName,len,NULL,0,NULL,NULL);
		char * pBuffer = new char[ichar + 1];
		if (pBuffer)
		{
			ZeroMemory(pBuffer,ichar+1);
		}
		WideCharToMultiByte(CP_ACP,0,longFile.cFileName,len,pBuffer,ichar,NULL,NULL);
		string strTargetFilename;
		for (int i=0; i<ichar; i++)
		{
			strTargetFilename += pBuffer[i];
		}
		delete pBuffer;
		pBuffer = NULL;

		string ZIPFileName = strFilesPath;

		ZIPFileName+=strTargetFilename;
		//将解压文件路径转为TCHAR类型
		int iUnicode = MultiByteToWideChar(CP_ACP, 0, ZIPFileName.c_str(), ZIPFileName.length(), NULL, 0);
		WCHAR* pwUnicode = new WCHAR[iUnicode + 2];
		if (pwUnicode)
		{
			ZeroMemory(pwUnicode, iUnicode + 2);
		}
		MultiByteToWideChar(CP_ACP, 0, ZIPFileName.c_str(), ZIPFileName.length(), pwUnicode, iUnicode);
		pwUnicode[iUnicode] = '\0';
		pwUnicode[iUnicode+1] = '\0';
		int iRelativePath = MultiByteToWideChar(CP_ACP, 0, strToPath.c_str(), strToPath.length(), NULL, 0);
		WCHAR* pwRelativePath = new WCHAR[iRelativePath + 2];
		if (pwRelativePath)
		{
			ZeroMemory(pwRelativePath, iRelativePath + 2);
		}
		MultiByteToWideChar(CP_ACP, 0, strToPath.c_str(), strToPath.length(), pwRelativePath, iRelativePath);
		pwRelativePath[iRelativePath] = '\0';
		pwRelativePath[iRelativePath+1] = '\0';
		

		//拷贝替换文件
		SHFILEOPSTRUCT FileOp;                   //填写SHFILEOPSTRUCT结构体,通过SHFileOperation告诉windows该做什么

		FileOp.hwnd = NULL;
		FileOp.wFunc = FO_COPY;
		FileOp.pFrom = (LPCWSTR)pwUnicode;       //路径必须以双NULL结尾   ,源文件路径
		FileOp.pTo = pwRelativePath;             //路径必须以双NULL结尾   ,目的文件路径
		FileOp.fFlags = FOF_NOCONFIRMATION | FOF_SILENT;
		FileOp.hNameMappings = NULL;
		FileOp.lpszProgressTitle = NULL;

		//可以实现各种文件操作,例如文件的拷贝,移动,删除等
		int nRet = SHFileOperation(&FileOp);

		delete pwUnicode;
		pwUnicode = NULL;

		delete pwRelativePath;
		pwRelativePath = NULL;

		if(0 != nRet)
		{
			return FALSE;
		}

	} while (FindNextFile(HFileHandle,&longFile) != 0); //判断当前目录下有没有下一目录或文件
	FindClose(HFileHandle);  //关闭由FindFirstFile打开的搜索句柄
}

如果你编译出错,那么可能是某个函数没有添加头文件或引用库

可以添加这句试试

#include <Shlwapi.h> 

#include <shlobj.h>

#pragma comment(lib, "shlwapi.lib")