如何将Java对象(bean)转换为键值对(反之亦然)？

public class Person implements Serializable {
    private String name;
    private int age;

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

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}

public static Map<String, Object> objectToMap(Object obj) throws IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(bos);
    oos.writeObject(obj);
    oos.flush();

    ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
    ObjectInputStream ois = new ObjectInputStream(bis);
    return (Map<String, Object>) ois.readObject();
}

public static void main(String[] args) throws IOException, ClassNotFoundException {
    Person person = new Person("John Doe", 30);
    Map<String, Object> personMap = objectToMap(person);
    System.out.println(personMap);
}

{name=John Doe, age=30}

public static Object mapToObject(Map<String, Object> map, Class<?> clazz) throws IOException, ClassNotFoundException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    ObjectOutputStream oos = new ObjectOutputStream(bos);
    oos.writeObject(map);
    oos.flush();

    ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());
    ObjectInputStream ois = new ObjectInputStream(bis);
    return clazz.cast(ois.readObject());
}

public static void main(String[] args) throws IOException, ClassNotFoundException {
    Map<String, Object> personMap = new HashMap<>();
    personMap.put("name", "John Doe");
    personMap.put("age", 30);

    Person person = (Person) mapToObject(personMap, Person.class);
    System.out.println(person);
}

Person{name='John Doe', age=30}