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小练习 - 复制，移动，迭代文件，迭代删除目录

news 2025/6/29 5:04:09

前言

各位师傅大家好，我是qmx_07，今天对前面的知识，进行小练习

拷贝文件CopyFile

BOOL MyCopyFile(const CHAR* src, const CHAR* det)
{HANDLE hFileSrc = CreateFile(src, GENERIC_READ | GENERIC_WRITE, NULL, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);if (INVALID_HANDLE_VALUE == hFileSrc){cout << GetLastError() << endl;return FALSE;}LARGE_INTEGER FileSize;if (!GetFileSizeEx(hFileSrc, &FileSize)){cout << GetLastError() << endl;return FALSE;}CHAR* Buffer = new CHAR[FileSize.LowPart + 1];memset(Buffer, 0, FileSize.LowPart + 1);DWORD NumRead = 0;BOOL Ret = ReadFile(hFileSrc, Buffer, FileSize.LowPart + 1, &NumRead, NULL);if (!Ret){cout << GetLastError() << endl;return FALSE;}HANDLE hFileDet = CreateFile(det, GENERIC_READ | GENERIC_WRITE, NULL, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);DWORD length = strlen(Buffer);DWORD NumWrite = 0;Ret = WriteFile(hFileDet, Buffer, length, &NumWrite, NULL);if (!Ret){cout << GetLastError() << endl;return FALSE;}CloseHandle(hFileSrc);CloseHandle(hFileDet);return TRUE;
}

思路：拷贝文件是读取文件的内容数据，再写入另一个文件，从而完成复制
建议手写一下锻炼一下手敲代码的能力
画面演示:

移动文件MoveFile

BOOL MyMoveFile(const CHAR* src , const CHAR* det)
{HANDLE hFileSrc = CreateFile(src, GENERIC_READ | GENERIC_WRITE, NULL, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);if (INVALID_HANDLE_VALUE == hFileSrc){cout << GetLastError() << endl;return FALSE;}LARGE_INTEGER FileSize;if (!GetFileSizeEx(hFileSrc, &FileSize)){cout << GetLastError() << endl;return FALSE;}CHAR* Buffer = new CHAR[FileSize.LowPart + 1];memset(Buffer, 0, FileSize.LowPart + 1);DWORD NumRead = 0;BOOL Ret = ReadFile(hFileSrc, Buffer, FileSize.LowPart + 1, &NumRead, NULL);if (!Ret){cout << GetLastError() << endl;return FALSE;}HANDLE hFileDet = CreateFile(det, GENERIC_READ | GENERIC_WRITE, NULL, NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);DWORD length = strlen(Buffer);DWORD NumWrite = 0;Ret = WriteFile(hFileDet, Buffer, length, &NumWrite, NULL);if (!Ret){cout << GetLastError() << endl;}CloseHandle(hFileSrc);CHAR* tempSrc = const_cast<CHAR*>(src);if (!DeleteFile(tempSrc)){DWORD error = GetLastError();cout << "删除文件失败，错误码: " << error << endl;return FALSE;}CloseHandle(hFileDet);return TRUE;
}

思路: 其实与CopyFile一样，都是读取文件写入文件操作，但是要用DeleteFile函数将原文件清除
CHAR* tempSrc = const_cast<CHAR*>(src); 将const CHAR* 去除const常量属性，能够修改
画面演示:

递归遍历文件函数

BOOL recurseDirectory(const CHAR* src)
{char NewDir[100];strcpy(NewDir, src);strcat(NewDir, "\\*");WIN32_FIND_DATA FindFileData;HANDLE hFind = FindFirstFile(NewDir, &FindFileData);if (INVALID_HANDLE_VALUE == hFind){cout << GetLastError() << endl;return FALSE;}do {if ((FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0 && strcmp(FindFileData.cFileName, ".") != 0 &&strcmp(FindFileData.cFileName, "..") != 0){strcpy(NewDir, src);strcat(NewDir, "\\");strcat(NewDir, FindFileData.cFileName);recurseDirectory(NewDir);}else{if (strcmp(FindFileData.cFileName, ".") != 0 && strcmp(FindFileData.cFileName, "..") != 0){SYSTEMTIME SystemTime;FileTimeToSystemTime(&FindFileData.ftCreationTime, &SystemTime);std::cout << SystemTime.wYear << "-" << SystemTime.wMonth << "-" << SystemTime.wDay << " ";if (FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY){std::cout << "<DIR>" << " ";}std::cout << FindFileData.cFileName << std::endl;}}} while (FindNextFile(hFind, &FindFileData));CloseHandle(hFind);return TRUE;
}

通过创建NewDir,利用strcat拼接路径，进行迭代判断输出
画面演示:
素材:

删除非空目录


void DeleteDirectory(const std::string& directoryPath)
{WIN32_FIND_DATA findFileData;HANDLE hFind = FindFirstFile((directoryPath + "\\*").c_str(), &findFileData);if (hFind == INVALID_HANDLE_VALUE){return;}do {if (findFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY){if (strcmp(findFileData.cFileName, ".") != 0 && strcmp(findFileData.cFileName, "..") != 0){DeleteDirectory(directoryPath + "\\" + findFileData.cFileName);}}else{std::string filePath = directoryPath + "\\" + findFileData.cFileName;DeleteFile(filePath.c_str());}} while (FindNextFile(hFind, &findFileData));FindClose(hFind);RemoveDirectory(directoryPath.c_str());
}