上传单文件可以，上传文件数组后台无法获取
后台：

@ApiOperation(value = "新增", nickname = "/file/add", httpMethod = "POST", response = Object.class, notes = "新增", authorizations = {
			@Authorization(value = "") })
	@ApiImplicitParams({
			@ApiImplicitParam(value = "fileList", paramType = "form", name = "fileList", dataType = "java.io.File"),
			@ApiImplicitParam(value = "customId", paramType = "form", name = "id", dataType = "Long") })
	@At(value = "/file/addComment")
	@AdaptBy(type = UploadAdaptor.class, args = { "${app.root}/tmp" })
	public Map<String, String> add(@Param("fileList") TempFile[] fileList, @Param("customId") Long customId) { 
		System.out.println(fileList);
		for (TempFile file : fileList) {
			System.out.println(file.getName());
		}
		Map<String, String> map = new HashMap<>();
		map.put("result", "test");
		return map;
	}

前台

let param = new FormData(); //创建form对象
param.append('fileList', fileList);
let config = {
                headers: {
                    'Content-Type': 'multipart/form-data'
                }
            };
 api.upload('/test/api/file/add', param, config, resp => {
                console.log(resp);
            },
            error => {
                this.$Message.error('失败');
            });