如何将对象类型转换为HashMap

import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;

public class ObjectToHashMapConverter {
    public static Map<String, Object> convert(Object obj) {
        Map<String, Object> hashMap = new HashMap<>();

        // 获取对象的类型
        Class<?> objClass = obj.getClass();

        // 遍历对象的属性
        for (Field field : objClass.getDeclaredFields()) {
            field.setAccessible(true); // 设置属性可访问

            try {
                Object value = field.get(obj); // 获取属性的值
                hashMap.put(field.getName(), value); // 将属性名和值添加到HashMap中

                // 如果属性是嵌套对象或集合类型，递归转换为HashMap
                if (value != null && !isPrimitiveOrWrapper(value.getClass())) {
                    hashMap.put(field.getName(), convert(value));
                }
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }

        return hashMap;
    }

    // 判断是否为基本类型或包装类型
    private static boolean isPrimitiveOrWrapper(Class<?> type) {
        return type.isPrimitive() || type.equals(Boolean.class) || type.equals(Character.class)
                || type.equals(Byte.class) || type.equals(Short.class) || type.equals(Integer.class)
                || type.equals(Long.class) || type.equals(Float.class) || type.equals(Double.class)
                || type.equals(Void.class) || type.equals(String.class);
    }

    public static void main(String[] args) {
        // 示例对象
        class Person {
            private String name;
            private int age;
            private Address address;

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

        class Address {
            private String city;
            private String country;

            public Address(String city, String country) {
                this.city = city;
                this.country = country;
            }
        }

        // 创建示例对象
        Address address = new Address("Beijing", "China");
        Person person = new Person("John", 30, address);

        // 将对象转换为HashMap
        Map<String, Object> hashMap = convert(person);

        // 打印转换后的HashMap
        for (Map.Entry<String, Object> entry : hashMap.entrySet()) {
            System.out.println(entry.getKey() + ": " + entry.getValue());
        }
    }
}