Springboot webFlux filter 获取 requestBody

public Mono<ServerHttpRequest> generateNewRequest(ServerHttpRequest request) {
        return DataBufferUtils.join(request.getBody())
                .map(dataBuffer -> {
                    byte[] bytes = new byte[dataBuffer.readableByteCount()];
                    dataBuffer.read(bytes);
　　　　　　　　　　　　//释放内存
                    DataBufferUtils.release(dataBuffer);
                    return bytes;
                }).flatMap(bodyBytes -> {
                    log.info("request body :{}", new String(bodyBytes));
                    return Mono.just(generateNewRequest(request, bodyBytes));
                });
    }

    public ServerHttpRequest generateNewRequest(ServerHttpRequest request, byte[] bytes) {
        DataBuffer dataBuffer = stringBuffer(bytes);
        Flux<DataBuffer> flux = Flux.just(dataBuffer);
        ServerHttpRequest newRequest = new ServerHttpRequestDecorator(request) {
            @Override
            public Flux<DataBuffer> getBody() {
                return flux;
            }

            @Override
            public HttpHeaders getHeaders() {
                HttpHeaders httpHeaders = new HttpHeaders();
                httpHeaders.remove(HttpHeaders.CONTENT_LENGTH);
                httpHeaders.putAll(request.getHeaders());
                if (bytes.length > 0L) {
                    httpHeaders.setContentLength(bytes.length);
                } else {
                    httpHeaders.set(HttpHeaders.TRANSFER_ENCODING, "chunked");
                }
                return httpHeaders;
            }
        };
        return newRequest;
    }

private DataBuffer stringBuffer(byte[] bytes) {
    NettyDataBufferFactory nettyDataBufferFactory = new NettyDataBufferFactory(ByteBufAllocator.DEFAULT);
    DataBuffer buffer = nettyDataBufferFactory.allocateBuffer(bytes.length);
    buffer.write(bytes);
    return buffer;
}