Java_遍历获取json数据的所有key值

    public static void getJsonKey(Object obj,String listname){
        if(obj instanceof JSONObject){
            for (Map.Entry<String, Object> entry : ((JSONObject) obj).entrySet()) {
                System.out.println(listname+":"+entry.getKey());
                if(!(entry.getValue() instanceof String)){
                    getJsonKey(entry.getValue(),entry.getKey());
                }
            }
        }
        if(obj instanceof JSONArray){
            JSONArray jsonArray = (JSONArray) obj;
            for (int i = 0;i < jsonArray.size();i++){
                getJsonKey(jsonArray.get(i),listname);
            }
        }
    }