java，对象和map互转

package com.generic.type;

import java.io.Serializable;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.Map;

/**
 * Generic05
 *
 * @author zhong
 * @version 1.0
 * @description
 * @since 2023/8/17 10:30
 */
public class Generic05 {
    static class User implements Serializable {


        private static final long serialVersionUID = -6148496197242680896L;

        public User() {
        }

        public User(Long id, String name) {
            this.id = id;
            this.name = name;
        }

        private Long id;
        private String name;

        public Long getId() {
            return id;
        }

        public void setId(Long id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

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

        @Override
        public String toString() {
            return "User{" +
                    "id=" + id +
                    ", name='" + name + ''' +
                    '}';
        }
    }

    public static void main(String[] args) throws Exception {
        User user = new User(1L, "zs");
        Map map = obj2Map(user);

        System.out.println(map);

        User user1 = map2Obj(map, User.class);
        System.out.println(user1);
    }

    /**
     * 对象转map
     *
     * @param obj
     * @param <T>
     * @return
     * @throws IllegalAccessException
     */
    public static <T> Map obj2Map(T obj) throws IllegalAccessException {
        Map map = new HashMap<>();

        // 获取所有字段：通过 getClass() 方法获取 Class 对象，然后获取这个类所有字段
        Field[] fields = obj.getClass().getDeclaredFields();
        for (Field field : fields) {
            // 开放字段操作权限
            field.setAccessible(true);
            // 设置值
            map.put(field.getName(), field.get(obj));
        }

        return map;

    }

    /**
     * map转对象
     *
     * @param map
     * @param cla
     * @param <T>
     * @return
     * @throws Exception
     */
    public static <T> T map2Obj(Map<Object, Object> map, Class<T> cla) throws Exception {
        if (map == null) {
            return null;
        }
        if (cla == null) {
            return null;
        }
        T obj = cla.getConstructor().newInstance();
        Field[] fields = cla.getDeclaredFields();
        for (Field field : fields) {
            int mod = field.getModifiers();
            if (Modifier.isStatic(mod) || Modifier.isFinal(mod)) {
                continue;
            }
            field.setAccessible(true);
            if (map.containsKey(field.getName())) {
                field.set(obj, map.get(field.getName()));
            }
        }
        return obj;
    }

}