广度优先遍历目录

public class ListPath{
	List<File> dirs = new LinkedList<File>();
	public void getPathList(String root) {
		dirs.add(new File(root));
		while (dirs.size() > 0) {
			File f = (File) dirs.remove(0);
			System.out.println(f);

			String[] s = f.list();
			if (s != null) {
				int i = s.length;
				for (int j = 0; j < i; j++) {
				File d = new File(f.getAbsolutePath() + File.separator
							+ s[j]);
					if (d.isDirectory()) {
						dirs.add(d);
					}
				}
			}
		}
	}
}