Jersey ContainerResponseFilter example of CORS Filter. The Jetty version is more comprehensive: https://gist.github.com/yunspace/07d80a9ac32901f1e149

CORSContainerResponseFilter.java

import javax.inject.Singleton;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.Provider;
import java.io.IOException;

@Singleton
@Provider
public class CORSFilter implements ContainerResponseFilter {

    @Override
    public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext) throws IOException {
        final int ACCESS_CONTROL_MAX_AGE_IN_SECONDS = 12 * 60 * 60;
        MultivaluedMap<String, Object> headers = responseContext.getHeaders();

        headers.add(ACCESS_CONTROL_ALLOW_ORIGIN, "*");
        headers.add(ACCESS_CONTROL_ALLOW_HEADERS, "origin, content-type, accept, authorization");
        headers.add(ACCESS_CONTROL_ALLOW_CREDENTIALS, "true");
        headers.add(ACCESS_CONTROL_ALLOW_METHODS, "GET, POST, PUT, DELETE, OPTIONS, HEAD");
        headers.add(ACCESS_CONTROL_MAX_AGE, ACCESS_CONTROL_MAX_AGE_IN_SECONDS);

    }
}

DropwizardApplication.java

run(Configuration configuration, Environment environment) {
  environment.jersey().register(CORSFilter.class);
}