javafx 2 webview custom url handler, don't work relative url

I have simple app with code:

webView.getEngine().load("classpath:data/index.html");

Custom URLStreamHandler:

public class Handler extends URLStreamHandler {
    private final ClassLoader classLoader;

    public Handler() {
        this.classLoader = getClass().getClassLoader();
    }

    public Handler(ClassLoader classLoader) {
        this.classLoader = classLoader;
    }

    @Override
    protected URLConnection openConnection(URL u) throws IOException {
        URL resourceUrl = classLoader.getResource(u.getPath());
        if(resourceUrl == null)
            throw new IOException("Resource not found: " + u);

        return resourceUrl.openConnection();
    }
}

installed by:

URL.setURLStreamHandlerFactory(protocol -> {
    if(protocol.equals("classpath")) {
        return new Handler();
    } else {
        return null;
    }
});

It load data/index.html:

<!DOCTYPE html>
<html>
<head>
    <title>Test</title>
</head>
<body>
<div>Hello, World!!!</div>
<img src="download.jpg">
</body>
</html>

but in result image doesn't appears.

What to do to allow WebView resolve relative link like "download.jpg"?

I thin I found the solution:

in Handler.openConnection(URL u) we have to add

String path = getURL().getPath().startsWith("/") ? getURL().getPath().substring(1) : getURL().getPath();
URL resourceUrl = classLoader.getResource(path);

instead of

URL resourceUrl = classLoader.getResource(u.getPath());

and to standartize URL, instead

webView.getEngine().load("classpath:data/index.html");

use

webView.getEngine().load("classpath:///data/index.html");

来源：https://stackoverflow.com/questions/20709777/javafx-2-webview-custom-url-handler-dont-work-relative-url

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