Java-->用遞歸方法複製目錄、子目錄以及文件(文件用到IO流)

package com.dragon.java.newcopyfile;

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

public class Test {
    public static void main(String args[]) {
        File file = new File("f:/Exercises");
        File file2 = new File("f:/book");
        copyFile(file, file2);
    }

        // 遞歸方法
    public static void copyFile(File file, File file2) {
                // 當找到目錄時，創建目錄
        if (file.isDirectory()) {
            file2.mkdir();
            File[] files = file.listFiles();
            for (File file3 : files) {
                           // 遞歸
                            copyFile(file3, new File(file2, file3.getName()));
            }
                //當找到文件時
        } else if (file.isFile()) {
            File file3 = new File(file2.getAbsolutePath());
            try {
                file3.createNewFile();
                copyDatas(file.getAbsolutePath(), file3.getAbsolutePath());
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

        // 複製文件數據的方法
    public static void copyDatas(String filePath, String filePath1) {
        FileInputStream fis = null;
        FileOutputStream fos = null;
        try {
                        // 位元組流
                        fis = new FileInputStream(filePath);
            fos = new FileOutputStream(filePath1);
            byte[] buffer = new byte[1024];
            while (true) {
                int temp = fis.read(buffer, 0, buffer.length);
                if (temp == -1) {
                    break;
                } else {
                    fos.write(buffer, 0, temp);
                }
            }
        } catch (IOException e) {
            System.out.println(e);
        } finally {
            try {
                fis.close();
                fos.close();
            } catch (IOException e) {
                System.out.println(e);
            }
        }
    }
}