Java递归拷贝文件夹

import java.io.*;
import java.util.Scanner;


public class Demo {

    public static void main(String[] args) {
        File srcDirFile = getDirFile("输入源文件夹路径");
        File destDirFile = getDirFile("输入目标路径");
        if (srcDirFile.equals(destDirFile)) {
            System.out.println("源文件夹和目标文件夹相同，不能复制");
            return;
        }
        try {
            copyDirFile(srcDirFile, destDirFile);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 复制
     *
     * @param srcDirFile
     * @param destDirFile
     */
    private static void copyDirFile(File srcDirFile, File destDirFile) throws Exception {
        File file = new File(destDirFile, srcDirFile.getName());
        file.mkdir();
        File[] srcListFiles = srcDirFile.listFiles();
        for (File subFile : srcListFiles) {
            if (subFile.isFile()) {
                BufferedInputStream bis = new BufferedInputStream(new FileInputStream(subFile));
                BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(new File(file, subFile.getName())));
                int len;
                while ((len = bis.read()) != -1) {
                    bos.write(len);
                }
                bis.close();
                bos.close();
            } else {
                copyDirFile(subFile, file);
            }
        }
    }

    /**
     * 获取文件夹路径
     */
    private static File getDirFile(String msg) {
        Scanner scanner = new Scanner(System.in);
        System.out.println(msg);
        while (true) {
            String line = scanner.nextLine();
            File file = new File(line);
            if (file.isDirectory()) {
                return file;
            } else {
                System.out.println("输入错误，重新输入");
            }
        }
    }
}