识别相同图片的Java代码

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.imageio.ImageIO;
import org.imgscalr.Scalr;

public class FindSameImages {
    private static final int avgPixel = 128;

    public static void main(String[] args) throws IOException {
        String folder1 = "path/to/folder1";
        String folder2 = "path/to/folder2";
        List<String> folder1Images = new ArrayList<>();
        List<String> folder2Images = new ArrayList<>();
        getAllImageFiles(folder1, folder1Images);
        getAllImageFiles(folder2, folder2Images);
        Map<String, String> map = new HashMap<>();
        for (String imagePath : folder1Images) {
            String hash = getHash(imagePath);
            map.put(hash, imagePath);
        }
        for (String imagePath : folder2Images) {
            String hash = getHash(imagePath);
            if (map.containsKey(hash)) {
                String folderName = new File(map.get(hash)).getParentFile().getName();
                System.out.println("相同图片：" + new File(imagePath).getName() + "，所在文件夹：" + folderName);
            }
        }
    }

    private static void getAllImageFiles(String folderPath, List<String> list) {
        File folder = new File(folderPath);
        File[] files = folder.listFiles();
        for (File file : files) {
            if (file.isDirectory()) {
                getAllImageFiles(file.getAbsolutePath(), list);
            } else if (isImageFile(file.getName())) {
                list.add(file.getAbsolutePath());
            }
        }
    }

    private static boolean isImageFile(String fileName) {
        String[] extensions = new String[] { "jpg", "jpeg", "png", "bmp", "gif" };
        for (String ext : extensions) {
            if (fileName.endsWith("." + ext)) {
                return true;
            }
        }
        return false;
    }

    public static String getHash(String imagePath) throws IOException {
        BufferedImage image = ImageIO.read(new File(imagePath));
        BufferedImage scaledImage = Scalr.resize(image, Scalr.Method.AUTOMATIC, Scalr.Mode.FIT_EXACT, 8, 8, Scalr.OP_ANTIALIAS);
        int[] pixels = new int[64];
        int i = 0;
        for (int y = 0; y < 8; y++) {
            for (int x = 0; x < 8; x++) {
                int rgb = scaledImage.getRGB(x, y);
                int r = (rgb >> 16) & 0xff;
                int g = (rgb >> 8) & 0xff;
                int b = rgb & 0xff;
                int gray = (r + g + b) / 3;
                pixels[i++] = gray;
            }
        }
        StringBuilder sb = new StringBuilder();
        for (int pixel : pixels) {
            if (pixel > avgPixel) {
                sb.append("1");
            } else {
                sb.append("0");
            }
        }
        return sb.toString();
    }
}