javase复制文件夹

package com.copyfile;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.junit.Test;

public class FileTraverse {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        String file = "E:\大数据资料\视频\01_十八掌教育_徐培成_大数据零基础教程\01-Java基础\Java基础第01天\02-Java简介-DOS命令.avi";
        reverse(file);
        copyDir("D:\arch", "e:\arch");
    }

    /**
     * 打印输出目录结构
     * 
     * @param file
     */
    public static void reverse(String file) {
        File dir = new File(file);
        if (dir.exists()) {
            System.out.println(dir.getAbsolutePath());
            if (dir.isDirectory()) {
                File[] files = dir.listFiles();
                if (files != null && files.length > 0) {
                    for (File f : files) {
                        reverse(f.getAbsolutePath());
                    }
                }
            }
        }
    }

    /**
     * 复制文件夹
     */
    public static void copyDir(String file, String destDir) {
        File f = new File(file);
        if (f.exists()) {
            // 如果是目录
            if (f.isDirectory()) {
                // 创建新的目录
                File newFile = new File(destDir, f.getName());
                newFile.mkdir();
                File[] files = f.listFiles();
                if (files != null && files.length > 0) {
                    for (File ff : files) {
                        copyDir(ff.getAbsolutePath(), newFile.getAbsolutePath());
                    }
                }
            } else {
                copyFile(file, destDir);
            }
        }
    }

    // 复制文件
    private static void copyFile(String srcfile, String destDir) {
        try {
            File file = new File(srcfile);
            File newFile = new File(destDir, file.getName());
            FileInputStream fis = new FileInputStream(file);
            FileOutputStream fos = new FileOutputStream(newFile);
            byte[] buf = new byte[1024];
            int len = 0;
            while((len=fis.read(buf)) != -1) {
                fos.write(buf, 0, len);
            }
            fis.close();
            fos.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    @Test
    public void test() {
        copyFile("D:\arch", "e:\arch");
    }
}