如何使用tornadoFx将多部分文件发送到springboot服务器？

// TornadoFx界面代码
class FileUploadView : View() {
    override val root = vbox {
        val fileChooser = chooseFile("选择文件", arrayOf(FileChooser.ExtensionFilter("所有文件", "*.*")), FileChooserMode.Multi)
        button("上传") {
            action {
                val selectedFiles = fileChooser.showOpenDialog(primaryStage)
                if (selectedFiles != null) {
                    uploadFiles(selectedFiles)
                }
            }
        }
    }

    private fun uploadFiles(files: List<File>) {
        runAsync {
            val client = HttpClient()
            files.forEach { file ->
                val formData = MultiPartFormData().apply {
                    add("file", file)
                }
                val response = client.post("http://localhost:8080/upload", formData)
                println(response)
            }
        }
    }
}

// Spring Boot Controller代码
@RestController
class FileUploadController {
    @PostMapping("/upload")
    fun uploadFile(@RequestParam("file") file: MultipartFile) {
        // 处理文件上传逻辑，保存文件到指定目录
        // ...
    }
}