檔案目錄是樹狀結構，很有層次感，且每層操作大致相同。複製目錄中的檔案，不是建立資料夾操作，就是複製檔案操作，所以遞迴思想在這裡很適用。

程式碼如下:

/****
 * 
 * @author wjw
 * @since 2018-02-27
 *
 */
public class Copy {

	public static void main(String[] args) throws IOException,
			InterruptedException {
		// 配置檔案配置輪詢碟符
		int second = 10;// 輪詢檔案是否存在時間間隔
		String souPath = "H:/"; // 源路徑
		String desPath = "E:/U/test"; // 目標路徑
		File file = new File(souPath);
		while (!file.exists()) {
			System.out.println(souPath + "目錄不存在!");
			Thread.sleep(1000 * second);
		}
		long beginMillis = System.currentTimeMillis();
		copy(souPath, desPath);
		System.out.println("複製檔案約耗時: "
				+ (System.currentTimeMillis() - beginMillis) / 1000 + " s.");
	}

	public static void copy(String souPath, String desPath) throws IOException {
		File dir = new File(souPath);

		if (dir.isDirectory()) {
			System.out.println("開始拷貝目錄 " + souPath + " 中的檔案到目錄 " + desPath
					+ " 中...");
			String[] filesStr = dir.list();
			for (int i = 0; i < filesStr.length; i++) {
				String tempSouPath = souPath + File.separator + filesStr[i];
				String tempDesPath = desPath + File.separator + filesStr[i];
				if (new File(tempSouPath).isDirectory()) {
					createDir(tempDesPath);
					copy(tempSouPath, tempDesPath);
				} else {
					copyFile(tempSouPath, tempDesPath);
				}

			}

			System.out.println(souPath + "目錄中的檔案拷貝完畢!");
		} else if (dir.isFile()) {

			copyFile(souPath, desPath);

		}

	}

	/****
	 * 建立目錄
	 * 
	 * @param dirPath
	 */
	public static void createDir(String dirPath) {
		// System.out.println("建立目錄:" + dirPath);
		File file = new File(dirPath);
		if (file != null) {
			if (!file.exists()) {
				file.mkdir();
			}

		}

	}

	/*******
	 * 複製檔案
	 * 
	 * @throws IOException
	 */
	public static void copyFile(String sourcePath, String desPath)
			throws IOException {
		System.out.println("       開始拷貝檔案  " + sourcePath + "...");
		FileInputStream fis = null;
		FileOutputStream fos = null;
		File file = new File(sourcePath);
		if (file != null && file.isFile()) {
			fis = new FileInputStream(file);
			File des = new File(desPath);
			fos = new FileOutputStream(des);
			int bufferSize = 1024;
			byte[] data = new byte[bufferSize];
			int length = 0;
			while ((length = fis.read(data, 0, bufferSize)) != -1) {
				fos.write(data, 0, length);
			}

		}
		fis.close();
		fos.close();
		System.out.println("   " + desPath + "檔案拷貝完畢!");
	}

}
 

如有錯誤，歡迎指正!

end