public void add(HttpServletRequest request){
        String content = this.getRequestContent(request);
        if(StringUtils.isBlank(content)){
            ...
        }
        JSONObject obj =null;
        try {
            obj = JSONObject.fromObject(content);
        } catch (Exception e) {
            e.printStackTrace();
            Log.info("引數格式有誤"
 
);
        }       
        String font = JsonUtils.getJsonString(obj, "font","");
        int maxFont = JsonUtils.getJsonRealInt(obj, "maxFont", 0);              
}