如何批量清理系统临时文件(语言:C#、 C/C++、 php 、python 、java ),
语言之争由来已久,下面做一些IO实验(遍历9G多的文件,批量删除),尽量用事实来比较谁优谁劣。操作系统:win7 64 位,文件包大小:9.68G。
一、语言:C#
开发环境:vs 2013
代码总行数:43行
耗时:7秒
代码:
using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; namespace BatchDelete { class Program { static void Main(string[] args) { // 输入目录 e:\tmp string path; Console.WriteLine("输入要清理的目录:"); path = Console.ReadLine(); // 开始计时 Console.WriteLine("开始计时:"+DateTime.Now.ToString("HH:mm:ss")); // 先遍历匹配查找再循环删除 if (Directory.Exists(path)) { Console.Write("正在删除"); foreach (string fileName in Directory.GetFileSystemEntries(path)) { if (File.Exists(fileName) && fileName.Contains("cachegrind.out")) { File.Delete(fileName); } } Console.WriteLine(""); } else { Console.WriteLine("该目录不存在!"); } // 计时结束 Console.WriteLine("结束计时:" + DateTime.Now.ToString("HH:mm:ss")); Console.ReadKey(); } } }
运行效果图:
二、语言:C/C++
开发环境:vs 2013
代码总行数:50行
耗时:36秒
代码:
#include <iostream> #include <string> #include <Windows.h> #include <boost\filesystem\operations.hpp> #include <boost\filesystem\path.hpp> #include <boost\filesystem\convenience.hpp> #include <boost\algorithm\string.hpp> using namespace std; int main(int argc, char * argv[]) { // 输入目录 e:\tmp string strPath; cout << "输入要清理的目录:" << endl; getline(cin, strPath); // 开始计时 SYSTEMTIME sys_time; //声明变量 GetLocalTime(&sys_time); //将变量值设置为本地时间 printf("开始计时:%02d:%02d:%02d\n", sys_time.wHour,sys_time.wMinute,sys_time.wSecond); // 先遍历匹配查找再循环删除 namespace fs = boost::filesystem; fs::path full_path(fs::initial_path()); full_path = fs::system_complete(fs::path(strPath, fs::native)); if (fs::exists(full_path)) { cout << "正在删除" ; fs::directory_iterator item_begin(full_path); fs::directory_iterator item_end; for (; item_begin != item_end; item_begin++) { if (!fs::is_directory(*item_begin)) { if (fs::exists(item_begin->path()) && boost::contains(item_begin->path().string(), "cachegrind.out")) { fs::remove(item_begin->path()); } } } cout << "" << endl; } else { cout << "该目录不存在!" << endl; } // 计时结束 GetLocalTime(&sys_time); printf("计时结束:%02d:%02d:%02d\n", sys_time.wHour, sys_time.wMinute, sys_time.wSecond); system("pause"); return 0; }
运行效果图:
三、语言:PHP
开发环境:Phpstorm
代码总行数:32行
耗时:13秒
代码:
<?php /** * Created by PhpStorm. * User: Administrator * Date: 16-1-29 * Time: 上午9:31 */ date_default_timezone_set('prc'); //输入目录 e:\tmp $path = 'e:\tmp'; //开始计时 echo date("H:i:s",time()) . '<br/>'; //先遍历匹配查找再循环删除 if(is_dir($path)) { echo "正在删除"; $mydir = dir($path); while($file = $mydir->read()) { if(file_exists("$path/$file") && strpos($file, 'cachegrind.out') === 0) { unlink("$path/$file"); } } echo '<br/>'; } else { echo "该目录不存在!" . '<br/>'; } //计时结束 echo date("H:i:s",time()) . '<br/>';
运行效果图:
四、语言:Java
开发环境:eclipse
代码总行数:43行
耗时:10秒
代码:
package com.yejing; import java.io.File; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Scanner; public class Test { public static void main(String[] args) { Scanner s = new Scanner(System.in); // 输入目录 e:\tmp String path = null; System.out.println("输入要清理的目录:"); path = s.next(); // 开始计时 Date nowTime=new Date(); SimpleDateFormat time=new SimpleDateFormat("HH:mm:ss"); System.out.println("开始计时:"+ time.format(nowTime)); // 先遍历匹配查找再循环删除 File dir = new File(path); if(dir.exists()){ System.out.print("正在删除"); File[] fs = dir.listFiles(); for(int i=0;i<fs.length;i++){ if(!fs[i].isDirectory()){ if(fs[i].isFile() && fs[i].exists() && fs[i].getName().contains("cachegrind.out")) { fs[i].delete(); } } } System.out.println(""); }else{ System.out.println("该目录不存在!"); } // 计时结束 nowTime=new Date(); System.out.println("开始计时:"+ time.format(nowTime)); } }
运行效果图:
五、语言:Python 3.3.5
开发环境:IDLE
代码总行数:20行
耗时:10秒
代码:
# -*- coding: utf-8 -*- import datetime import os # 输入目录 e:\tmp path = input("输入要清理的目录:\n"); # 开始计时 print("开始计时:",datetime.datetime.now().strftime('%H:%M:%S')); # 先遍历匹配查找再循环删除 if(os.path.exists(path)): print("正在删除"); for parent,dirnames,filenames in os.walk(path): for filename in filenames: targetFile = os.path.join(parent,filename) if (os.path.isfile(targetFile) and "cachegrind.out" in targetFile): os.remove(targetFile)
else:
print("该目录不存在!"); # 计时结束 print("结束计时:",datetime.datetime.now().strftime('%H:%M:%S'));
运行效果图:
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