在WebFlux下从ServerWebExchange中获取参数

    @RequestMapping(value = "/uploadhead")    
    public Object uploadhead(ServerWebExchange exchange) throws IOException {
        Map<String, String> stringStringMap = exchange.getRequest().getHeaders().toSingleValueMap();
        log.info("map:{}", stringStringMap);
        //打印head
        Mono<MultiValueMap<String, String>> formData = exchange.getFormData();
        //获取form-data中的内容
        formData.subscribe(map -> {
            Map<String, String> formMap = map.toSingleValueMap();
            log.info("formData:{}", formMap);
        });
        //如果是获取post或者get请求之类的body的话就从exchange.getRequest().getBody()中获取
        Map<String, String> queryParams = exchange.getRequest().getQueryParams().toSingleValueMap();
        log.info("queryParams:{}", queryParams);
        URI uri = exchange.getRequest().getURI();
        log.info("uri:{}", uri);
        return exchange.getMultipartData().map(data -> {
                    Map<String, Part> multipartData = data.toSingleValueMap();
                    log.info("multipartData:{}", multipartData);
                    try {
                        return chessService.uploadhead(multipartData);
                        //此处拿到的就是form-data中获取的所有参数的map，需要打印或者使用就看自己的业务需求怎么处理了。
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    return null;
                }
        );