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，以便在多个游戏中使用，并且在过去的 5-6 个小时里我一直在试图找出这 1 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，我正在尝试调用 getByteArray() 方法，该方法应该将帧作为 BufferedImage 加载，然后返回 byte[] 数据.尝试加载图像时，我不断收到 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());
}

我真的需要这方面的帮助，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，所有的图像也是如此.

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 / 开头(否则它被认为是相对于类包的路径).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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