我使用下面的代码打开https服务器。当我去我的ip地址：xx.xxx.xxx.xxx zip文件下载正常。但是当我访问ip时：https://xx.xxx.xxx.xxx/，zip文件不会自动下载我是一个新手，所以如果可能的话，请给予我一个例子代码.谢谢你

public class Main implements HttpHandler {
    @Override
    public void handle(HttpExchange exchange) throws IOException {
        Headers h = exchange.getResponseHeaders();
        h.add("Content-Type", "application/octet-stream");
        h.add("Content-Disposition", "attachment; filename=Pack.zip");
        exchange.sendResponseHeaders(200, 0);
        OutputStream os = exchange.getResponseBody();
        Files.newInputStream(Paths.get("C://Pack.zip")).transferTo(os);
        os.close();
    }

    public static void main(String[] args) throws Exception {
        HttpServer server = HttpServer.create(new InetSocketAddress(36), 0);
        server.createContext("/", new Main());
        server.start();
    }
}