使用Grizzly的嵌入式Java服务器：如何启用http2

因此，我尝试使用Grizzly / Jersey创建REST API服务器，并且工作正常，但无法弄清楚如何启用http2。关于该主题的文档几乎不存在。这就是我所拥有的：

private static SSLContext getSSLContext(final String keystore) throws Exception {
    SSLContext sslContext = SSLContext.getInstance("TLSv1");
    final char[] passphrase = "changeit".toCharArray();
    final KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
    final KeyStore ks = KeyStore.getInstance("JKS");
    try (InputStream stream = Main.class.getResourceAsStream(keystore)) {
        ks.load(stream, passphrase);
    }
    kmf.init(ks, passphrase);
    sslContext.init(kmf.getKeyManagers(), null, null);
    return sslContext;
}

final ResourceConfig rc = new ResourceConfig().packages("path.to.package");
final HttpServer server = GrizzlyHttpServerFactory.createHttpServer(uri, rc, false);
final NetworkListener listener = server.getListeners().iterator().next();
listener.registerAddOn(new Http2AddOn());
listener.setSecure(true);
final SSLEngineConfigurator configurator =
    new SSLEngineConfigurator(
        getSSLContext("keystore.jks"),
        false,
        false,
        false
    );
listener.setSSLEngineConfig(configurator);

而且，据我所知，我的pom.xml文件具有所有适当的依赖项：

<dependency>
    <groupId>org.glassfish.grizzly</groupId>
    <artifactId>grizzly-http2</artifactId>
    <version>2.3.24</version>
</dependency>

<dependency>
    <groupId>org.glassfish.grizzly</groupId>
    <artifactId>grizzly-npn-bootstrap</artifactId>
    <version>1.2</version>
</dependency>

<dependency>
    <groupId>org.glassfish.grizzly</groupId>
    <artifactId>grizzly-npn-api</artifactId>
    <version>1.2</version>
</dependency>

<dependency>
    <groupId>org.glassfish.jersey.containers</groupId>
    <artifactId>jersey-container-grizzly2-http</artifactId>
</dependency>

当我用curl -v --http2 ...测试服务器时，我得到了

• ...
• ALPN / NPN，服务器不同意协议
• 使用TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256的SSL连接
• ...

有人知道缺少什么吗？