使用递归复制给定目录下的所有文件和文件夹

使用递归复制给定目录下的所有文件和文件夹

package two;

import java.io.*;

public class Test11 {
    public  static  String copyToRoot = "D:\\info456";
    public static void main(String[] args) {
        File file = new File(copyToRoot);
        file.mkdir();
        copyFiles();
    }

    public static void copyFiles() {
        File file = new File("D:\\info123");
        String[] list = file.list();
        for (String name : list)
            copy(new File(file, name), name);
    }

    //copy()方法传入两个参数，绝对路径和子目录名，子目录名是append的
    public static void copy(File f, String d) {
        File root = new File(copyToRoot);
        if (f.isDirectory()) {
            File dd = new File(root,d);
            dd.mkdir();
            for (String sub : f.list()) {
                File ff = new File(f, "\\" + sub);
                copy(ff, d + "\\" + sub);
            }
        }
        if (f.isFile()) {
            File file = new File(root, d);
            //System.out.println(f.getPath() + "是文件，复制到"+root.getPath()+"\\"+d);
            try {

                file.createNewFile();
                //System.out.println("----------" + file.getAbsoluteFile());
                FileInputStream fis = new FileInputStream(f);
                FileOutputStream fos = new FileOutputStream(file);
                if (fis.available() != 0) fos.write(fis.readAllBytes());
                fos.close();
                fis.close();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                System.err.println(f.getAbsolutePath()+"复制到"+file.getAbsolutePath()+"出现问题");
            }
        }
    }
}

 

使用递归删除给定目录下的所有文件和文件夹

package two;

import java.io.File;

public class Test12 {
    public static void main(String[] args) {
    deleteFiles();
//    Test11.copyToRoot = "D:/del123";
//    Test11.copyFiles();
    }


    public static void deleteFiles() {
        File file = new File("D:/del123");
        String[] list = file.list();
        for (String name : list)
            delete(new File(file,name));
        file.delete();
    }

    public static void delete(File f) {
    if(f.isDirectory()){
        for(String sub:f.list()){
            delete(new File(f,sub));
        }
        f.delete();
    }
    if(f.isFile()){
       // System.out.println(f.getAbsolutePath()+"是文件");
        f.delete();
    }
    }
}