Java 拷贝文件夹

package com.copy;

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

import com.output.StreamUtils;

//拷贝文件夹
public class CopyDemo {

	public static void main(String[] args) {
		File source = new File("E:\\download\\Boom_man");
		File target = new File("E:\\copy");

		copy(source, target);
	}

	private static void copy(File source, File target) {
		if (!source.exists()) {
			return;
		}
		if (!target.exists()) {
			target.mkdirs();
		}
		// 如果是文件，直接创建
		if (source.isFile()) {
			copyFile(source, target);
			System.out.println("拷贝文件:" + source.getName());
		} else {
			// 列出source下的所有文件或文件夹
			File[] sourceChildren = source.listFiles();
			for (File f : sourceChildren) {
				copy(f, new File(target, source.getName()));
			}
		}

	}

	// 拷贝文件
	private static void copyFile(File source, File target) {
		if (!source.exists()) {
			System.out.println("文件不存在");
			return;
		}
		if (!target.exists()) {
			target.mkdirs();
		}

		File targetFile = new File(target, source.getName());

		// 拷贝
		BufferedInputStream bis = null;
		BufferedOutputStream bos = null;

		try {
			bis = new BufferedInputStream(new FileInputStream(source));
			bos = new BufferedOutputStream(new FileOutputStream(targetFile));

			int len = 0;
			byte[] buf = new byte[1024];
			while ((len = bis.read(buf)) != -1) {
				bos.write(buf, 0, len);
			}
			bos.flush();

		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally {
			StreamUtils.closeOutput(bos);
			StreamUtils.closeInput(bis);
		}

	}

}