json 數據類型錯誤, tomcat 400報錯，後端處理報錯

表單/json

 int 字段 寫成string、

    @RequestMapping(value = "/typeError",produces = "application/json;charset=utf-8")
    public String typeError(@RequestBody String str){
        JSONObject obj = JSONObject.parseObject(str);
        try {
            obj.getIntValue("age");
        } catch (Exception e) {
           // e.printStackTrace(); // For input string: "1s1"
            return "type error";
        }
        return obj.toJSONString();
    }