如何访问JAR文件中的资源？ [英] How to access resources in JAR file?

问题描述

我有一个带有工具栏的Java项目，工具栏上有图标。这些图标存储在名为resources /的文件夹中，因此例如路径可能是resources / icon1.png。这个文件夹位于我的src目录中，因此在编译时，文件夹被复制到bin /

I have a Java project with a toolbar, and the toolbar has icons on it. These icons are stored in a folder called resources/, so for example the path might be "resources/icon1.png". This folder is located in my src directory, so when it is compiled the folder is copied into bin/

我正在使用以下代码访问资源。

I'm using the following code to access the resources.

    protected AbstractButton makeToolbarButton(String imageName, String actionCommand, String toolTipText,
        String altText, boolean toggleButton) {

    String imgLocation = imageName;
    InputStream imageStream = getClass().getResourceAsStream(imgLocation);

    AbstractButton button;
    if (toggleButton)
        button = new JToggleButton();
    else
        button = new JButton();

    button.setActionCommand(actionCommand);
    button.setToolTipText(toolTipText);
    button.addActionListener(listenerClass);

    if (imageStream != null) { // image found
        try {
            byte abyte0[] = new byte[imageStream.available()];
            imageStream.read(abyte0);

            (button).setIcon(new ImageIcon(Toolkit.getDefaultToolkit().createImage(abyte0)));

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                imageStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    } else { // no image found
        (button).setText(altText);
        System.err.println("Resource not found: " + imgLocation);
    }

    return button;
}

（imageName将是resources / icon1.png等）。这在Eclipse中运行时工作正常。但是，当我从Eclipse导出可运行的JAR时，找不到图标。

(imageName will be "resources/icon1.png" etc). This works fine when run in Eclipse. However, when I export a runnable JAR from Eclipse, the icons are not found.

我打开了JAR文件，资源文件夹就在那里。我已经尝试了一切，移动文件夹，更改JAR文件等，但我无法显示图标。

I opened the JAR file and the resources folder is there. I've tried everything, moving the folder, altering the JAR file etc, but I cannot get the icons to show up.

有谁知道我做错了什么？

Does anyone know what I'm doing wrong?

（作为一个附带问题，是否有任何文件监视器可以使用JAR文件？当出现路径问题时，我通常只是打开FileMon来查看发生了什么，但是它只是在这种情况下显示为访问JAR文件）

(As a side question, is there any file monitor that can work with JAR files? When path problems arise I usually just open FileMon to see what's going on, but it just shows up as accessing the JAR file in this case)

谢谢。

推荐答案

要从JAR资源加载图像，请使用以下代码：

To load an image from a JAR resource use the following code:

Toolkit tk = Toolkit.getDefaultToolkit();
URL url = getClass().getResource("path/to/img.png");
Image img = tk.createImage(url);
tk.prepareImage(img, -1, -1, null);

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