public static void main(String[] args) {
        String json="{\"num\":90.82195113}";
        Num num= JSONObject.parseObject(json,Num.class);
        System.out.println(num.getNum());
    }


    public static class Num {
        private float num;

        public float getNum() {
            return num;
        }

        public void setNum(float num) {
            this.num = num;
        }
    }

4.922605