Could not find acceptable representation

 Resolving exception from handler [null]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
Resolving exception from handler [null]: org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
 Resolving exception fromhandler[null]:org.springframework.web.HttpMediaTypeNotAcceptableException: Could not find acceptable representation
springframework.web.servlet.DispatcherServlet - Null ModelAndView returned to DispatcherServlet with name 'spring': assuming HandlerAdapter completed request handling

因为@RequestMapping(value="/backend/loadUserTypeList.html",produces={"test/html;charset=UTF-8"})中test/html 写错  改为text/html
    @ResponseBody        
    public Object loadUserTypeList(@RequestParam(value="s_roleId",required=false) String s_roleId){
        String cjson="";
        try {
            DataDictionary dataDictionary=new DataDictionary();
            dataDictionary.setTypeCode("USER_TYPE");
            List<DataDictionary> userTypeList=dataDictionaryService.getDataDictionaries(dataDictionary);
            for(DataDictionary d:userTypeList){
                logger.debug("rtrtrtrtrtrtrryryrytyrytryt"+d.getTypeName());
            }
            JSONArray jo=JSONArray.fromObject(userTypeList);
            cjson=jo.toString();
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        return cjson;
    }