Java实体对象转Map工具类实现

package com.example.utils;

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

/**
 * 将实体类对象转换为 Map 的工具类
 */
public class EntityToMapConverter {

    /**
     * 将给定的对象转换为 Map
     * @param obj 需要转换的对象
     * @return 包含对象属性和值的 Map
     */
    public static Map convertObjectToMap(Object obj) {
        if (obj == null) return null;
        Map resultMap = new HashMap<>();
        Field[] fields = obj.getClass().getDeclaredFields();
        try {
            for (Field field : fields) {
                field.setAccessible(true);
                resultMap.put(field.getName(), field.get(obj));
            }
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
        return resultMap;
    }

    /**
     * 示例方法，展示如何使用 convertObjectToMap 方法
     * @param args 命令行参数
     */
    public static void main(String[] args) {
        User user = new User("123456", "John Doe", 30);
        user.setRegistrationDate(new Date());
        Map userMap = convertObjectToMap(user);
        userMap.forEach((key, value) -> System.out.println(key + ": " + value));
    }
}

/**
 * 用户实体类，用于测试转换功能
 */
class User {
    private String id;
    private String fullName;
    private int age;
    private Date registrationDate;

    // 构造函数
    public User(String id, String fullName, int age) {
        this.id = id;
        this.fullName = fullName;
        this.age = age;
    }

    // Getter 和 Setter 方法
    public String getId() { return id; }
    public void setId(String id) { this.id = id; }
    public String getFullName() { return fullName; }
    public void setFullName(String fullName) { this.fullName = fullName; }
    public int getAge() { return age; }
    public void setAge(int age) { this.age = age; }
    public Date getRegistrationDate() { return registrationDate; }
    public void setRegistrationDate(Date registrationDate) { this.registratiOnDate= registrationDate; }
}