如何让ans将json数据中的图像从服务器保存到arraylist中？

import org.json.JSONArray;
import org.json.JSONObject;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.util.ArrayList;

public class ImageDownloader {
    public static void main(String[] args) {
        String json = "{\"images\": [{\"url\": \"http://example.com/image1.jpg\"}, {\"url\": \"http://example.com/image2.jpg\"}]}";
        ArrayList<String> imageList = new ArrayList<>();

        try {
            JSONObject jsonObject = new JSONObject(json);
            JSONArray imagesArray = jsonObject.getJSONArray("images");

            for (int i = 0; i < imagesArray.length(); i++) {
                JSONObject imageObject = imagesArray.getJSONObject(i);
                String imageUrl = imageObject.getString("url");

                // 下载并保存图像文件
                String imagePath = downloadImage(imageUrl);

                // 将图像文件路径添加到ArrayList中
                imageList.add(imagePath);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        // 打印保存的图像文件路径
        for (String imagePath : imageList) {
            System.out.println(imagePath);
        }
    }

    private static String downloadImage(String imageUrl) throws IOException {
        String imagePath = "path/to/save/image.jpg";
        URL url = new URL(imageUrl);
        InputStream inputStream = url.openStream();
        FileOutputStream outputStream = new FileOutputStream(imagePath);

        byte[] buffer = new byte[1024];
        int bytesRead;
        while ((bytesRead = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, bytesRead);
        }

        outputStream.close();
        inputStream.close();

        return imagePath;
    }
}