package test;

import java.io.File;
import java.io.FileOutputStream;

public class Search {
    StringBuffer str = new StringBuffer();
    public static void main(String[] args) {
        try {
            Search s = new Search();
            s.search(new File("D:\\"));
            String name = s.str.toString();
            File file = new File("D:\\name.txt");
            FileOutputStream fos = new FileOutputStream(file);
            fos.write(name.getBytes());
            fos.flush();
            fos.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public void search(File file) {
        if (file.isFile()) {
            str.append(file.getName());
        } else {
            File[] files = file.listFiles();
            for (File f : files) {
                search(f);
            }
        }
    }
}

------解决方案--------------------

命令行

dir /s/b d: >> f:\files.txt