前端上传文件

uploadFilePromise(url) {
                return new Promise((resolve, reject) => {
                    let a = uni.uploadFile({
                        url: base.baseUrl + uploadHemogram.concat(this.patient.name), // 仅为示例，非真实的接口地址
                        filePath: url,
                        name: 'hemogram',
                        header: {
                            "Authorization": `Bearer ${this.token}`
                        },
                        formData:{
                            username: 'test'
                        },
                        success: (res) => {
                            console.log('success' , res)
                            setTimeout(() => {
                                resolve(res.data.data)
                            }, 1000)
                        },
                        fail: (err) => {
                            console.log('上传失败', err)
                        }
                    });
                    console.log('aaaa', a)
                })
            },

后端获取附带参数

 public Mono<ServerResponse> uploadFile(ServerRequest request){
        Mono<MultiValueMap<String, Part>> partMap = request.multipartData();
        partMap.map(m -> m.toSingleValueMap())
                        .map(f -> f.get("username")).cast(FormFieldPart.class).
                subscribe(map -> System.out.println("from data test " + map.value()));
    }