查找系统中的大文件(Windows) C++程序

男娘i 2022-07-13 09:16 164阅读 0赞

#include <iostream>
    #include <Windows.h>
    #include <string.h>
    #include <stdlib.h>
    #include <string>
    #include <utility>
    #include <map>
    using namespace std;
    
    const int max_size = 102400000; //100M
    
    map<int, pair<string, string>> fileInfoMap;
    
    void FindFile(char * pFilePath)
    {
    	WIN32_FIND_DATA FindFileData;
    	HANDLE hFind = INVALID_HANDLE_VALUE;
    	char DirSpec[MAX_PATH + 1];// 指定路径
    	DWORD dwError;
    
    	strncpy(DirSpec, pFilePath, strlen(pFilePath) + 1);
    	strncat(DirSpec, "/*", 3);
    
    	hFind = FindFirstFile(DirSpec, &FindFileData);
    
    	if (hFind == INVALID_HANDLE_VALUE){
    		cout << "无效文件句柄. 错误原因:" << GetLastError() << endl;
    		return;
    	}
    	else
    	{
    		if (FindFileData.dwFileAttributes != FILE_ATTRIBUTE_DIRECTORY)
    		{
    		//	cout << "filename：" << FindFileData.cFileName << "\t";
    		//	cout << "filesize：" << fileSize << endl;
    			int fileSize = FindFileData.nFileSizeLow;
    			if (fileSize > max_size)
    			{
    				fileInfoMap.insert(make_pair(fileSize, make_pair(FindFileData.cFileName, DirSpec)));
    			}
    		}
    		else if (FindFileData.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY
    			&& strcmp(FindFileData.cFileName, ".") != 0
    			&& strcmp(FindFileData.cFileName, "..") != 0)
    		{   //找到目录
    			char Dir[MAX_PATH + 1];
    			strcpy(Dir, pFilePath);
    			strncat(Dir, "/", 2);
    			strcat(Dir, FindFileData.cFileName);
    
    			FindFile(Dir);
    		}
    
    		while (FindNextFile(hFind, &FindFileData) != 0)
    		{
    			if (FindFileData.dwFileAttributes != FILE_ATTRIBUTE_DIRECTORY)
    			{   //找到文件
    				int fileSize = FindFileData.nFileSizeLow;//文件大小
    				if (fileSize > max_size)
    				{
    					fileInfoMap.insert(make_pair(fileSize, make_pair(FindFileData.cFileName, DirSpec)));
    				}
    			}
    			else if (FindFileData.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY
    				&& strcmp(FindFileData.cFileName, ".") != 0
    				&& strcmp(FindFileData.cFileName, "..") != 0)
    			{ //找到目录
    				char Dir[MAX_PATH + 1];
    				strcpy(Dir, pFilePath);
    				strncat(Dir, "/", 2);
    				strcat(Dir, FindFileData.cFileName);
    				FindFile(Dir);
    			}
    
    		}
    
    		dwError = GetLastError();
    		FindClose(hFind);
    		if (dwError != ERROR_NO_MORE_FILES)
    		{
    			printf("FindNextFile error. Error is %u ", dwError);
    			return;
    		}
    	}
    }
    
    int main()
    {
    	FindFile("D:");
    	FindFile("E:");
    	map<int, pair<string, string>>::iterator myiter = fileInfoMap.begin();
    	for ( ; myiter != fileInfoMap.end(); ++myiter)
    	{
    		cout << "size: " << myiter->first << "  " 
    			<< "name：" << myiter->second.first << "  " 
    			<< "path：" << myiter->second.second << endl;
    	}
    		
    	system("pause");
    }