package org.sw; import java.io.File; public class DeleteFolder {     /**      * 删除文件夹下的所有文件      * @param oldPath      */     public void deleteFile(File oldPath) {           if (oldPath.isDirectory()) {            System.out.println(oldPath + "是文件夹--");            File[] files = oldPath.listFiles();            for (File file : files) {              deleteFile(file);            }           }else{             oldPath.delete();           }         }     public static void main(String[] args) {         DeleteFolder df =  new DeleteFolder();         df.deleteFile(new File("E:/ddd/"));     } }