java代码实现C盘文件统计工具

 概述

工作电脑用了3年多了,100G的C盘也快吃不消了,每次打开看到C盘红了,总要用清理工具清理一下子.

不知道怎么最近清理工具清理了也没有什么效果,把temp下面的文件删除,没什么大作用.

总是有一种冲动要去处理掉,已经影响工作了.乘着星期天写个工具,分析一下C盘的文件,看看那些是最近才增加的,能不能手动删除掉.

版本介绍

• Maven-3.3.9
• JDK1.8 目录结构

com
  └─sedaier
      └─calcdir
          ├─service
          │  │  IDirSizeCalc.java
          │  │
          │  └─impl
          │         DirSizeCalcByForkJoinPoolImpl.java
          │
          ├─test
          │      Test.java
          │
          └─tool
                 OutputFileUtils.java //日志输出工具类

源码

DirSizeCalcByForkJoinPoolImpl.java

package com.sedaier.calcdir.service.impl;

import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ForkJoinPool;
import java.util.concurrent.ForkJoinTask;
import java.util.concurrent.RecursiveTask;

import com.sedaier.calcdir.service.IDirSizeCalc;
import com.sedaier.calcdir.tool.OutputFileUtils;

public class DirSizeCalcByForkJoinPoolImpl implements IDirSizeCalc {

    @Override
    public long getSize(final File file, final File log) {
        ForkJoinPool forkJoinPool = new ForkJoinPool();
        return forkJoinPool.invoke(new FileSizeFinder(file, log));
    }

    @SuppressWarnings("serial")
    private static class FileSizeFinder extends RecursiveTask<Long> {
        final File file;
        final File log;

        FileSizeFinder(final File theFile, final File theLog) {
            file = theFile;
            log = theLog;
        }

        @Override
        public Long compute() {
            long size = 0;
            if (file.isFile()) {
                size = file.length();
                OutputFileUtils.write(log, file);
            } else {
                final File[] children = file.listFiles();
                if (children != null) {
                    List<ForkJoinTask<Long>> tasks = new ArrayList<ForkJoinTask<Long>>();
                    for (final File child : children) {
                        if (child.isFile()) {
                            size += child.length();
                            OutputFileUtils.write(log, child);
                        } else {
                            tasks.add(new FileSizeFinder(child, log));
                        }
                    }
                    for (final ForkJoinTask<Long> task : invokeAll(tasks)) {
                        size += task.join();
                    }
                }
            }
            return size;
        }
    }
}

IDirSizeCalc.java

package com.sedaier.calcdir.service;

import java.io.File;

public interface IDirSizeCalc {
    long getSize(final File file, final File log);
}

Test.java

package com.sedaier.calcdir.test;

import java.io.File;

import com.sedaier.calcdir.service.IDirSizeCalc;
import com.sedaier.calcdir.service.impl.DirSizeCalcByForkJoinPoolImpl;
import com.sedaier.calcdir.tool.OutputFileUtils;

public class Test {
    public static void main(final String[] args) {
        String dirPath = "C:\\Windows";
        String log = "C:\\Users\\Administrator\\Desktop\\log.log";
        File file = new File(dirPath);
        File logFile = new File(log);

        calcDirSize(file, logFile, new DirSizeCalcByForkJoinPoolImpl());
        OutputFileUtils.distory();
    }

    private static void calcDirSize(File file, File log, IDirSizeCalc dirSizeCalc) {
        dirSizeCalc.getSize(file, log);
    }
}

OutputFileUtils.java

package com.sedaier.calcdir.tool;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Calendar;

public class OutputFileUtils {

    public static int time = 0;
    //buffer刷信息时间
    public static int overtime = 100;
    //避免重复初始化
    public static boolean flag = false;
    public static FileWriter out = null;
    public static BufferedWriter bw = null;
    //昨天
    public static long day;
    //用于计算日期 -1 当前日期往前一天,-2 当前日期往前两天
    public static int amount = -1;

    static {
        //初始化日期
        Calendar instance = Calendar.getInstance();
        instance.add(Calendar.DAY_OF_MONTH, amount);
        day = instance.getTimeInMillis();
    }

    public static void write(final File log, File file) {

        try {
            if (!flag && !log.exists()) {
                log.createNewFile();
                flag = true;
            }
            if(out == null || bw == null) {
                out = new FileWriter (log);
                bw = new BufferedWriter(out);
            }
            long lastModified = file.lastModified();
            if(lastModified > day) {
                bw.write(String.format("%s===大小=%d===时间=%tF",file.getAbsolutePath(),file.length()/1000000,lastModified));
                bw.newLine();
            }
            time++;
            if(time > overtime) {
                bw.flush();
                time = 0 ;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public static void distory() {
        try {
            bw.close();
            out.close();
            System.out.println("关闭成功!");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

源码下载地址

https://gitee.com/lanseyouyu/sediaer-calcdir.git

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原文链接：https://blog.csdn.net/qq125281823/article/details/118651166