如何在Java中缓存从URL下载的图像？

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.*;
import java.net.URL;
import java.util.concurrent.TimeUnit;

public class ImageCacheExample {
    private static Cache<String, BufferedImage> imageCache = CacheBuilder.newBuilder()
            .maximumSize(100) // 设置最大缓存数量
            .expireAfterWrite(1, TimeUnit.HOURS) // 设置缓存过期时间
            .build();

    public static BufferedImage getImageFromUrl(String imageUrl) throws IOException {
        BufferedImage image = imageCache.getIfPresent(imageUrl);
        if (image == null) {
            URL url = new URL(imageUrl);
            InputStream inputStream = url.openStream();
            image = ImageIO.read(inputStream);
            inputStream.close();
            imageCache.put(imageUrl, image);
        }
        return image;
    }

    public static void main(String[] args) {
        try {
            String imageUrl = "https://example.com/image.jpg";
            BufferedImage image = getImageFromUrl(imageUrl);
            // 使用图像进行后续处理或显示
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}