如何从打包到自己的.jar中的java库中访问资源

ClassLoader classLoader = YourClass.class.getClassLoader();
URL resourceUrl = classLoader.getResource("resource-file-name");
InputStream resourceStream = classLoader.getResourceAsStream("resource-file-name");

try (InputStream resourceStream = classLoader.getResourceAsStream("resource-file-name")) {
    // 读取资源文件的内容
    // ...
} catch (IOException e) {
    // 处理异常
    // ...
}

try (InputStream resourceStream = classLoader.getResourceAsStream("resource-file-name");
     OutputStream outputStream = new FileOutputStream("output-file-path")) {
    byte[] buffer = new byte[1024];
    int bytesRead;
    while ((bytesRead = resourceStream.read(buffer)) != -1) {
        outputStream.write(buffer, 0, bytesRead);
    }
} catch (IOException e) {
    // 处理异常
    // ...
}