java 递归遍历目录

class ListFiles{
	public static ArrayList filelist = new ArrayList();
	
	public static void listfiles(String dir){	
		File file = new File(dir);
		File[] files = file.listFiles();
		if(null == files){
			return;
		}
		for(int i = 0; i < files.length; i++){
			if(files[i].isDirectory())
			{
				listfiles(files[i].getAbsolutePath());
			}
			else{
				System.out.println(files[i]);
				filelist.add(files[i]);
			}
		}
	}
}