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Use JAVA code to delete all empty folders on the disk

怪我咯
Release: 2017-06-30 10:45:50
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这篇文章主要介绍了JAVA实现将磁盘中所有空文件夹进行删除的代码,需要的朋友可以参考下

实现代码一、

import java.io.File;
import java.io.*;
public class DelNullDir {
	public void ShowDir(File f){
		for (File f1:f.listFiles()){
			if(f1.isDirectory()){
				ShowDir(f1);
				//一直递归到最后的目录
				if(f1.listFiles().length==0){
					//如果是文件夹里面没有文件证明是空文件,进行删除
					f1.delete();
				}
			}
		}
	}
	/**
 * 
 * 把磁盘中所有空的文件夹进行删除
 */
	public static void main(String[] args) {
		File f = new File("F:\\360CloudUI\\");
		new DelNullDir().ShowDir(f);
	}
}
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实现代码二、

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Date;
/**
 * Description:递归方式,扫描并删除磁盘中的空文件夹
 *(C盘中的一些空文件夹是系统文件夹,删除多次后空文件夹数量不变,则停止此程序)
 * */
public class DelEmptyFolders {
  //空文件夹的绝对路径
  private static StringBuffer paths;
  //本次扫描的空文件夹的数量
  private static int cnt;
  public static void main(String[] args) {
    boolean flag = true;
    do{
      cnt = 0;
      paths = new StringBuffer();
      long start = new Date().getTime();
      System.out.println("正在扫描......");
      //要扫描的磁盘
      File disk = new File("C:/");
      //日志文件的位置
      File log = new File("D:/scanLog_C.txt");
      try {
        //扫描磁盘
        scanEmptyFolders(disk);
        //空文件夹数大于0时,将文件夹的绝对路径记录到日志中并再扫描一次;否则停止扫描
        if(cnt > 0){
          fileWrite(paths.toString(), log);
        }else{
          flag = false;
        }
      } catch (FileNotFoundException e1) {
        e1.printStackTrace();
      } catch (IOException e2) {
        e2.printStackTrace();
      }
      long end = new Date().getTime();
      System.out.println("本次扫描完毕,耗时:"+(end-start)/1000+" 秒,共删除:"+cnt+" 个空文件夹!\n");
    }while(flag);
  }
  /**
   * TODO:递归扫描空文件夹
   * @throws UnsupportedEncodingException
   * */
  private static void scanEmptyFolders(File file) throws UnsupportedEncodingException{
    if(file != null && file.isDirectory()){
      File[] files = file.listFiles();
      //非空文件夹
      if(files != null){
        if(files.length > 0){
          for (File temp : files) {
            scanEmptyFolders(temp);
          }
        }else{
          System.out.println(file.getAbsolutePath());
          //记录日志
          paths.append(new String((file.getAbsolutePath()+"\r\n").getBytes(),"UTF-8"));
          cnt++;
          //删除空文件夹
          file.delete();
        }
      }
    }
  }
  /**
   * TODO:将字符串写入文本文件
   * @throws IOException
   * */
  private static void fileWrite(String info,File file) throws IOException{
    FileOutputStream fos = new FileOutputStream(file);
    BufferedOutputStream bos = new BufferedOutputStream(fos);
    bos.write(info.getBytes());
    bos.flush();
    bos.close();
    fos.close();
  }
}
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