如何使用java检索mp3文件的缩略图

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.imageio.ImageIO;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.farng.mp3.MP3File;
import org.farng.mp3.TagException;
import org.farng.mp3.id3.ID3v2_3_0Tag;

public class MP3ThumbnailRetriever {
    public static void main(String[] args) {
        String directoryPath = "path/to/mp3/files";
        String outputDirectory = "path/to/output/thumbnails";

        List<File> mp3Files = getMP3Files(directoryPath);
        for (File mp3File : mp3Files) {
            try {
                MP3File mp3 = new MP3File(mp3File);
                ID3v2_3_0Tag id3v2Tag = mp3.getID3v2Tag();
                if (id3v2Tag != null && id3v2Tag.getAlbumImage() != null) {
                    byte[] imageData = id3v2Tag.getAlbumImage();
                    String outputFilePath = outputDirectory + File.separator + 
                        FilenameUtils.getBaseName(mp3File.getName()) + ".jpg";
                    saveThumbnail(imageData, outputFilePath);
                    System.out.println("Thumbnail saved for: " + mp3File.getName());
                }
            } catch (IOException | TagException e) {
                e.printStackTrace();
            }
        }
    }

    private static List<File> getMP3Files(String directoryPath) {
        List<File> mp3Files = new ArrayList<>();
        File directory = new File(directoryPath);
        if (directory.isDirectory()) {
            File[] files = directory.listFiles();
            for (File file : files) {
                if (file.isFile() && FilenameUtils.getExtension(file.getName()).equalsIgnoreCase("mp3")) {
                    mp3Files.add(file);
                }
            }
        }
        return mp3Files;
    }

    private static void saveThumbnail(byte[] imageData, String outputFilePath) throws IOException {
        FileUtils.writeByteArrayToFile(new File(outputFilePath), imageData);
    }
}