如何设置Jersey初始化参数？

<servlet>
    <servlet-name>JerseyServlet</servlet-name>
    <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
    <init-param>
        <param-name>jersey.config.server.provider.packages</param-name>
        <param-value>com.example.rest</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

<init-param>
    <param-name>jersey.config.server.provider.classnames</param-name>
    <param-value>
        org.glassfish.jersey.jackson.JacksonFeature,
        org.glassfish.jersey.media.multipart.MultiPartFeature
    </param-value>
</init-param>

public class MyApplication extends ResourceConfig {
    public MyApplication() {
        packages("com.example.rest");
        property("jersey.config.server.provider.classnames", "org.glassfish.jersey.jackson.JacksonFeature");
    }
}