Spring Webclient多部分/表单数据请求

import org.springframework.http.HttpMethod;
import org.springframework.http.MediaType;
import org.springframework.http.client.reactive.ReactorClientHttpConnector;
import org.springframework.util.MultiValueMap;
import org.springframework.web.reactive.function.BodyInserters;
import org.springframework.web.reactive.function.client.WebClient;
import reactor.core.publisher.Mono;

public class WebClientExample {
    public static void main(String[] args) {
        WebClient webClient = WebClient.builder()
                .clientConnector(new ReactorClientHttpConnector())
                .baseUrl("https://example.com")
                .build();

        MultiValueMap<String, Object> parts = new LinkedMultiValueMap<>();
        parts.add("file", new FileSystemResource("path/to/file.txt"));
        parts.add("name", "John Doe");

        Mono<String> response = webClient.method(HttpMethod.POST)
                .uri("/upload")
                .contentType(MediaType.MULTIPART_FORM_DATA)
                .body(BodyInserters.fromMultipartData(parts))
                .retrieve()
                .bodyToMono(String.class);

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