遍历目录

import java.io.File;

public class Main {
    public static void main(String[] args) {
        File file = new File("E:\\itcast");
        bianlifile(file);

    }

    public static void bianlifile(File f) {
        File[] files = f.listFiles();
        for (File ff : files) {
            if (ff.isDirectory()) {
                bianlifile(ff);
            } else {
                System.out.println(ff.getAbsolutePath());
            }
        }
    }

}