java 目录复制

import java.io.*;

public class Test2 {
    public static void main(String[] args) throws IOException {
        File in = new File("D:\\test\\");
        File out = new File("D:\\abc\\");
        copyDirectory(in, out);
    }
    //复制目录
    public static void copyDirectory(File in, File out){
        //判断目标目录是否存在
        if (!out.exists()) {
            //目标目录不存在，创建此目录
            out.mkdir();
        }
        //获取目标目录绝对路径
        String path = out.getPath();
        //获取源目录下的所有目录、文件，并遍历
        File[] inFiles = in.listFiles();
        for (File file : inFiles) {
            //更改目标路径
            out = new File(path, file.getName());
            //判断file是否为目录，
            //如果是目录则复制此目录，如果不是则复制此文件
            if (file.isDirectory()) {
                copyDirectory(file, out);
            } else {
                copyFile(file, out);
            }
        }
    }


    //复制文件
    public static void copyFile(File in, File out) {
        FileInputStream fis = null;
        FileOutputStream fos = null;
        try {
            //创建输入输出流
            fis = new FileInputStream(in);
            fos = new FileOutputStream(out);
            //复制文件————读取源文件数据，写入到目标文件
            byte[] data = new byte[1024];
            int len;
            while ((len = fis.read(data)) != -1) {
                fos.write(data, 0, len);
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            //关闭流
            if (fis != null) {
                try {
                    fis.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            if (fos != null) {
                try {
                    fos.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }

    }

}