编译使用g++ demo.cpp -std=c++17 确保使用 C++17 及以上版本进行编译 推荐 9.0 以上版本
首先创建logs总文件夹，例如/home/xs/logs
然后创建当前日期的文件夹，例如/home/xs/logs/2024.12.10
随后把文件放入此日期文件夹中，例如/home/xs/logs/2024.12.10/3d.pcd
最后遍历logs下的所有文件夹，判断文件夹日期和当前系统日期差距是多少天，超过设置时间的文件夹会以递归的形式将内容和文件夹全部删除
#include <iostream>
#include <filesystem>
#include <chrono>
#include <fstream>namespace fs = std::filesystem;// 定义 days 类型以兼容 C++17
using days = std::chrono::duration<int, std::ratio<86400>>;// 判断文件夹是否超过一个月
bool isOlderThanOneMonth(const fs::directory_entry &dirEntry) {// 获取文件的最后写入时间（文件时钟）auto fileTime = dirEntry.last_write_time();// 转换为 system_clock 时间点auto fileTimeAsSystemClock = std::chrono::time_point_cast<std::chrono::system_clock::duration>(fileTime - fs::file_time_type::clock::now() + std::chrono::system_clock::now());// 获取当前时间auto now = std::chrono::system_clock::now();// 计算时间差并判断是否超过 30 天auto age = std::chrono::duration_cast<days>(now - fileTimeAsSystemClock).count();return age > 30;
}// 创建以今日日期命名的文件夹
std::string createTodayFolder(const std::string &baseDir) {auto t = std::time(nullptr);auto tm = *std::localtime(&t);char folderName[100];std::strftime(folderName, sizeof(folderName), "%Y-%m-%d", &tm);std::string todayFolder = baseDir + "/" + folderName;if (!fs::exists(todayFolder)) {fs::create_directory(todayFolder);std::cout << "Created folder: " << todayFolder << std::endl;} else {std::cout << "Folder already exists: " << todayFolder << std::endl;}return todayFolder;
}// 删除超过一个月的文件夹
void cleanupOldFolders(const std::string &baseDir) {for (const auto &entry: fs::directory_iterator(baseDir)) {if (fs::is_directory(entry) && isOlderThanOneMonth(entry)) {fs::remove_all(entry);std::cout << "Deleted old folder: " << entry.path() << std::endl;}}
}int main() {std::string baseDir = "logs";//文件目录// 创建主目录if (!fs::exists(baseDir)) {fs::create_directory(baseDir);}// 创建今日文件夹std::string todayFolder = createTodayFolder(baseDir);// 复制文件到今日文件夹std::string sourceFilePath = "/home/xs/BOX_1.pcd"; //要移动到文件夹里面的而文件std::string destinationFilePath = todayFolder + "/2d.pcd"; //移动到logs/todayFolder里面，命名为2d.pcdtry {fs::copy(sourceFilePath, destinationFilePath, fs::copy_options::overwrite_existing);std::cout << "Copied file to: " << destinationFilePath << std::endl;} catch (const fs::filesystem_error &e) {std::cerr << "Error copying file: " << e.what() << std::endl;}// 清理一个月前的文件夹cleanupOldFolders(baseDir);return 0;
}
