Java:当程序是.jar时,它不再读取jar文件中的图像？

import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;

public class ImageFromJar {
    public static void main(String[] args) {
        URL imageUrl = ImageFromJar.class.getResource("/path/to/image.png");
        try {
            BufferedImage image = ImageIO.read(imageUrl);
            System.out.println("Image width: " + image.getWidth());
            System.out.println("Image height: " + image.getHeight());
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}