upload上传完，responseTxt为空

分类：HBuilder

upload

前端代码：
var upload = plus.uploader.createUpload(
"http://192.168.20.13/imgfile/uploadApp",
{method:"POST"});
upload.addEventListener("statechanged", function(u, status){
if (status == 200 ) {
mui.alert("resp:" + u.responseText);
}
})
后台
@RequestMapping("/imgfile/uploadApp")
public void uploadApp(HttpServletRequest request, @RequestParam MultipartFile file,
@RequestParam(required = false, defaultValue = "false") boolean video,
HttpServletResponse response) {

    JSONObject result = this.upload(request, file, video);  

    try {  
        response.getWriter().print(result.toJSONString());  
    } catch (IOException e) {  
        this.logger.catching(e);  
    }  
    return ;  
}

文件上传已成功，但是相应的responseText一直为空，是什么情况？

2018-02-01 15:40 负责人:无分享