利用递归实现文件目录的拷贝

package com.company;//敏感肌不能用

import java.io.*;

public class Main  {
    public static void main(String[] args) {
        File srcFile=new File("C:\Users\Administrator\Desktop\链表");
        File destFile=new File("E:\目标文件夹");
        copyDir(srcFile,destFile);
    }

    private static void copyDir(File srcFile, File destFile) {
        if(srcFile.isFile()){
            FileInputStream in=null;
            FileOutputStream out=null;

            try {
                in=new FileInputStream(srcFile);
                String path=destFile.getAbsolutePath().endsWith("\")?destFile.getAbsolutePath():destFile.getAbsolutePath()+"\"+srcFile.getAbsolutePath().substring(3);
                out=new FileOutputStream(path);
                int readcount=0;
                byte[] bytes=new byte[1024*1024];
                while((readcount=in.read(bytes))!=-1){
                    out.write(bytes,0,readcount);
                }
                out.flush();
            } catch (FileNotFoundException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            }finally {
                if(in!=null){
                    try {
                        in.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
                if(out!=null){
                    try {
                        out.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }


            return;
        }
        File[] files=srcFile.listFiles();
        for(File file:files){
            String srcDir=file.getAbsolutePath();
            String destDir=destFile.getAbsolutePath().endsWith("\")?destFile.getAbsolutePath():destFile.getAbsolutePath()+"\"+srcFile.getAbsolutePath().substring(3);
            File newFile=new File(destDir);
            if(!newFile.exists()){
                newFile.mkdirs();
            }
            copyDir(file,destFile);
        }
    }
}