使用spring boot项目反应器并行创建多个API调用，但不等待任何其他响应

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-webflux</artifactId>
</dependency>

import org.springframework.web.reactive.function.client.WebClient;
import reactor.core.publisher.Mono;

public class ApiService {
    private WebClient webClient;

    public ApiService() {
        this.webClient = WebClient.create();
    }

    public Mono<String> callApi(String url) {
        return webClient.get().uri(url).retrieve().bodyToMono(String.class);
    }
}

import reactor.core.publisher.Flux;
import reactor.core.scheduler.Schedulers;

public class Main {
    public static void main(String[] args) {
        ApiService apiService = new ApiService();

        Flux<String> apiCalls = Flux.just("api1", "api2", "api3")
                .parallel()
                .runOn(Schedulers.parallel())
                .flatMap(apiService::callApi);

        apiCalls.subscribe(System.out::println);
    }
}