If you want to add a header to all Jersey responses, you could also use a ContainerResponseFilter, from Jersey's filter documentation :
import java.io.IOException;
import javax.ws.rs.container.ContainerRequestContext;
import javax.ws.rs.container.ContainerResponseContext;
import javax.ws.rs.container.ContainerResponseFilter;
import javax.ws.rs.core.Response;
@Provider
public class PoweredByResponseFilter implements ContainerResponseFilter {
@Override
public void filter(ContainerRequestContext requestContext, ContainerResponseContext responseContext)
throws IOException {
responseContext.getHeaders().add("X-Powered-By", "Jersey :-)");
}
}
Make sure that you initialize it correctly in your project using the @Provider annotation or through traditional ways with web.xml.