如何在java中将图片url转换为字节数组？

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.net.URL;

public class ImageUtils {
    public static byte[] convertImageToByteArray(String imageUrl) {
        try {
            URL url = new URL(imageUrl);
            InputStream inputStream = url.openStream();
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            
            byte[] buffer = new byte[4096];
            int bytesRead;
            while ((bytesRead = inputStream.read(buffer)) != -1) {
                byteArrayOutputStream.write(buffer, 0, bytesRead);
            }
            
            inputStream.close();
            byteArrayOutputStream.close();
            
            return byteArrayOutputStream.toByteArray();
        } catch (Exception e) {
            e.printStackTrace();
        }
        
        return null;
    }
}