jar文件中的ImageIO [英] ImageIO inside jar file

问题描述

好的，所以我正在尝试为我的介绍屏幕制作一个API用于多个游戏，我花了最后5-6个小时试图找出这个问题。

Okay so I'm trying to make an API for my intro screen to be used across multiple games and I've spent the last 5-6 hours trying to figure out this 1 problem.

假设我在我的游戏中引用了API.jar，我试图调用方法getByteArray（），它应该将帧加载为BufferedImage然后返回byte []数据。尝试加载图像时，我经常得到input == null。

Lets say that I have the API.jar referenced in on of my games and I'm trying to call the method getByteArray() which is supposed to load the frame as a BufferedImage then return the byte[] data. I constantly get input == null when attempting to load the image.

public byte[] getByteArray() throws IOException {
    // Open Image
    String url = "/com/jumpbuttonstudio/api/resources/intro/Frame (" + current_frame + ").jpg";
    System.out.println("Loading: " + url);
    BufferedImage img = ImageIO.read(getClass().getClassLoader().getResourceAsStream(url));

    DataBufferByte data = (DataBufferByte) img.getRaster().getDataBuffer();

    return (data.getData());
}

我真的需要帮助，如果需要，我可以提供更多信息。

I really need help with this, I can provide more information if required.

上面的代码在API.jar中，所有图像都是如此。

The code above is in the API.jar and so are all the images.

推荐答案

如果使用 Class.getResourceAsStream（path），路径必须以 / （否则它被视为相对于类包的路径）。如果您使用 ClassLoader.getResourceAsStream（path），则路径不得以 / 开头。

If you use Class.getResourceAsStream(path), the path must start with a / (otherwise it's considered as a path relative to the class package). If you use ClassLoader.getResourceAsStream(path), the path must NOT start with a /.

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