如何在Spring WebFlux reactive中从ServerRequest对象获取请求体？

import org.springframework.web.reactive.function.server.ServerRequest;
import org.springframework.http.MediaType;
import reactor.core.publisher.Mono;

public Mono<Void> handleRequest(ServerRequest request) {
    Mono<String> requestBodyMono = request.bodyToMono(String.class);
    
    return requestBodyMono.flatMap(requestBody -> {
        // 对请求体进行处理
        System.out.println("请求体内容：" + requestBody);
        
        // 返回响应
        return request
            .response()
            .writeWith(Mono.just(requestBody)
                .map(responseBody -> request
                    .response()
                    .bufferFactory()
                    .wrap(responseBody.getBytes())));
    }).then();
}