即使对象已正确实例化，JSONObject也无法从现有对象读取属性

import java.lang.reflect.Field;

public class Main {
    public static void main(String[] args) throws NoSuchFieldException, IllegalAccessException {
        // 创建一个示例对象
        Person person = new Person("John", 25);

        // 获取Person类的age属性
        Field ageField = person.getClass().getDeclaredField("age");

        // 设置ageField可访问
        ageField.setAccessible(true);

        // 读取person对象的age属性值
        int ageValue = (int) ageField.get(person);

        System.out.println("Age: " + ageValue);
    }
}

class Person {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
}