java对象转map代码示例

Java对象转Map可以通过Java反射机制来实现，以下是一个示例代码：

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

public class ObjectToMapDemo {

    public static void main(String[] args) {
        Person person = new Person("张三", 20);
        Map<String, Object> map = objectToMap(person);
        System.out.println(map);
    }

    public static Map<String, Object> objectToMap(Object obj) {
        Map<String, Object> map = new HashMap<>();
        Class clazz = obj.getClass();
        Field[] fields = clazz.getDeclaredFields();
        for (Field field : fields) {
            field.setAccessible(true);
            try {
                map.put(field.getName(), field.get(obj));
            } catch (IllegalAccessException e) {
                e.printStackTrace();
            }
        }
        return map;
    }

    static class Person {
        private String name;
        private int age;

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