MappingJackson2JsonView——model转成json

一、ajax请求，返回ModelAndView对象，结果报404：

    @RequestMapping(value = "/video")
    public ModelAndView jj() {
        // MappingJackson2JsonView——modul转成json
        ModelAndView mv = new ModelAndView();
        mv.addObject("message", "视频上传成功");
        mv.addObject("status", "1");
        mv.addObject("videoUrl", "caiji");
        System.out.println(000);
        return mv;
    }

二、解决方法：利用MappingJackson2JsonView把model转成json

ModelAndView mv = new ModelAndView(new MappingJackson2JsonView());