我的接收端是如下配置：

@AdaptBy(type = UploadAdaptor.class,  args = { "${app.root}/WEB-INF/tmp"})
    @POST
    @At(value = {"/open/monitor"},top = true)
    @Ok("json")
    public Object monitor(@Param("closeup_pic") TempFile[] files,@Param("..")NutMap data, HttpServletRequest req, AdaptorErrorContext err) {
        try {
            if (err != null && err.getAdaptorErr() != null) {
                return Result.error("文件不合法:" + err.toString());
            } else {
                return Result.success();
                //return upload(type,name,files,data,"image");
            }
        } catch (Throwable e) {
            return Result.error("意外错误："+e.getMessage());
        }
    }

车牌扫描后，进入try，err不为空有错误，错误信息如下：

[DEBUG] 2018-07-12 14:22:45,002 org.nutz.ioc.impl.NutIoc.get(NutIoc.java:166) - Get 'currUser'<class cn.wizzer.app.web.commons.helper.CurrUser>
[WARN ] 2018-07-12 14:22:45,014 org.nutz.mvc.upload.UploadAdaptor.getReferObject(UploadAdaptor.java:197) - Using form upload ? You forgot this --> enctype='multipart/form-data' ?
[INFO ] 2018-07-12 14:22:45,022 org.nutz.mvc.adaptor.AbstractAdaptor.adapt(AbstractAdaptor.java:261) - Adapter Error catched , but I found AdaptorErrorContext param, so, set it to args, and continue
java.lang.RuntimeException: org.nutz.mvc.upload.UploadException: Unknow Content-Type : application/x-www-form-urlencoded
	at org.nutz.lang.Lang.wrapThrow(Lang.java:187)
	at org.nutz.mvc.upload.UploadAdaptor.getReferObject(UploadAdaptor.java:202)
	at org.nutz.mvc.upload.UploadAdaptor.getReferObject(UploadAdaptor.java:62)
	at org.nutz.mvc.adaptor.AbstractAdaptor.adapt(AbstractAdaptor.java:254)
	at org.nutz.mvc.upload.UploadAdaptor.adapt(UploadAdaptor.java:120)
	at org.nutz.mvc.impl.processor.AdaptorProcessor.process(AdaptorProcessor.java:30)
	at org.nutz.mvc.impl.processor.AbstractProcessor.doNext(AbstractProcessor.java:44)
	at org.nutz.mvc.impl.processor.ActionFiltersProcessor.process(ActionFiltersProcessor.java:58)
	at org.nutz.mvc.impl.processor.AbstractProcessor.doNext(AbstractProcessor.java:44)
	at cn.wizzer.app.web.commons.processor.XssSqlFilterProcessor.process(XssSqlFilterProcessor.java:35)

不清楚问题出在哪，这样是否没有文件类型限制，请指教