No converter for [class hz.saas.test1.JsonMsg] with preset Content-Type 'null'

有啥办法让return输出两个毫不相干的数值嘞

@RequestMapping(value="/insertCM", method= RequestMethod.POST,produces="text/html;charset=utf-8")
    public JsonMsg insertCM(Integer classid,Integer modelid){
        Sort220610 sort = null;
        Adddish220607 adddish = null;
        if (classid > 0 & modelid>0){
            sort = sortImpl.selectSortById(classid);
            adddish=adddishImpl.selDishById(modelid);
        }
        if (classid != null){
              JsonMsg.success().addInfo("sort",sort);
            if (modelid != null){
                ClassModel classModel=new ClassModel();
                classModel.setClassid(classid);
                classModel.setModelid(modelid);
                classmodelImpl.insertCM(classModel);
                return JsonMsg.success().addInfo("adddish",adddish);
            }
        }
        return JsonMsg.fail().addInfo("get_spec_error", "无信息");
    }

No converter for [class hz.saas.test1.JsonMsg] with preset Content-Type 'null'

NO converter for [xxxx] with preset Content-Type ‘null‘问题解决方法_zev1n的博客-CSDN博客 NO converter for [xxxx] with preset Content-Type 'null'问题解决方法 https://blog.csdn.net/m0_61849361/article/details/124763130