巫师的蜕变

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下面是文件接收的方法,其中List<FileItem> items为空,获取不到上传文件。

@RequestMapping(value = "/imagedetect", method = { RequestMethod.POST})
@ResponseBody
public Object imagedetect(ModelMap model, HttpServletResponse response) throws IOException {
        logger.info("检测任务开始====" + DateUtil.getCurrentTime());
        HttpServletRequest request=CommonUtil.getRequest();
        String access_token = request.getParameter("access_token");
        String url = request.getParameter("image");
        String tag = request.getParameter("tag");
        Object obj = new Object();
        //判断该请求是否有上传文件
        if(ServletFileUpload.isMultipartContent(request)) 
        {
            FileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);
            try {
                List<FileItem> items = upload.parseRequest(request);
                for(FileItem item: items)
                {
                                }
            } catch (FileUploadException e) {
                e.printStackTrace();
            }
                    }else{
            
        }
}

经过查找资料,分析后,发现在springmvc的配置文件中有这样一段代码:

<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> 
<property name="defaultEncoding" value="UTF-8" /> 
<property name="maxUploadSize" value="104857600"/> 
<property name="maxInMemorySize" value="4096"/> 
</bean> 

 这两种分别是两种上传文件的设置方式,但是不能同时使用。切记。

把这个配置删除测试发现问题解决。

如果你想使用springmvc的文件上传方式,只需要后台接收的方法这么写:

@RequestMapping(value = "imagedetectufile", method = { RequestMethod.POST })
	@ResponseBody
	public Object detectPictureTask(
			@RequestParam(value = "image", required = false) MultipartFile file[],
			ModelMap model, HttpServletResponse response) throws IOException {
                //业务逻辑。。。
                //............       
}

亲测好使。

posted on 2017-06-26 15:02  jacunjpg  阅读(8327)  评论(0编辑  收藏  举报