@Component

public class SampleWebFilter implements WebFilter {

​

    @Override

    public Mono<Void> filter(ServerWebExchange serverWebExchange, WebFilterChain webFilterChain) {

        serverWebExchange.getResponse().getHeaders().add("filter-added-header", "filter-added-header-value");

        return webFilterChain.filter(serverWebExchange);

    }

}