dependencies {
    implementation('org.springframework.boot:spring-boot-starter-webflux')
    implementation('org.projectlombok:lombok')
    testImplementation('org.springframework.boot:spring-boot-starter-test')
    testImplementation('io.projectreactor:reactor-test')
@Configuration
public class MultipleRouter {
    @Bean
    public RouterFunction<ServerResponse> routes(MultipleHandler multipleHandler) {
        return route(POST("/upload"), multipleHandler::upload);
Handler
@Component
@Slf4j
public class MultipleHandler {
    public Mono<ServerResponse> upload(ServerRequest request) {
        return request
                .body(BodyExtractors.toMultipartData())
                .log()
                .flatMap(parts -> Mono.just((FilePart) parts.toSingleValueMap().get("uploadFile")))
                .flatMap(filePart -> filePart.transferTo(new File(filePart.filename())))
                .flatMap(response -> ServerResponse.ok().body(BodyInserters.fromObject("Upload success")));
添加上传页面
index.html
<form enctype="multipart/form-data" action="/upload" method="post">
    <input type="file" name="uploadFile">
    <button type="submit">Submit</button>
</form>
CustomWebFilter.java 访问时跳转到首页
@Component
public class CustomWebFilter implements WebFilter {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
        if ("/".equals(exchange.getRequest().getURI().getPath())) {
            return chain.filter(
                    exchange.mutate()
                            .request(
                                    exchange.getRequest()
                                            .mutate()
                                            .path("/index.html")
                                            .build()
                            .build()
        return chain.filter(exchange);
访问 http://localhost:8080，上传文件成功后可以在当前目录下看到文件