递归遍历文件和递归删除文件

小案例

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package com.iopractise;   import java.io.File;   /**  * 使用递归的方式遍历文件  */ public class Demo20 {     public static void main(String[] args) { //        listDir(new File("D:\\雍和宫MGU工作"));         deleteDir(new File("D:\\雍和宫MGU工作"));     }       public static void listDir(File dir) {         File[] files = dir.listFiles();         System.out.println(dir.getAbsolutePath());         if (files != null && files.length > 0) {             for (File file : files) {                 if (file.isDirectory()) {                     listDir(file); // 递归                 } else {                     System.out.println(file.getAbsolutePath());                 }             }         }     }       public static void deleteDir(File dir){         File[] files = dir.listFiles();         if(files != null && files.length > 0){             for(File file : files){                 if(file.isDirectory()){                     deleteDir(file); // 递归                 }else{                     // 删除文件                     System.out.println(file.getAbsolutePath() + "删除" + file.delete());                 }             }         }         System.out.println(dir.getAbsolutePath()+"删除："+dir.delete());     }   }