浅谈Java对象禁止使用基本类型

package com.zrj.tools.framework.entity;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * 用户对象
 *
 * @author zrj
 * @since 2022/11/29
 **/
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class User {
    private Long id;
    private String name;

    private int age;
    private long phone;
    private short phone2;
    private double userTime;
    private float totalTime;
}

package com.zrj.tools.framework.utils;

import cn.hutool.core.bean.BeanUtil;
import com.zrj.tools.framework.entity.Customer;
import com.zrj.tools.framework.entity.User;

/**
 * 对象构建
 *
 * @author zrj
 * @since 2023/1/4
 **/
public class BeanUtils extends BeanUtil {

    /**
     * 对象的基本数据类型带有默认值，导致不赋值时依然被默认赋值
     *
     * @param args
     */
    public static void main(String[] args) {
        User user = User.builder().id(18L).name("jerry").build();
        //输出结果：User(id=18, name=jerry, age=0, phone=0, phone2=0, userTime=0.0, totalTime=0.0)
        System.out.println(user);

        Customer customer = convert(user, Customer.class);
        System.out.println(customer);
    }

    /**
     * 基于hutool的对象拷贝
     *
     * @param source           源对象
     * @param target           目标对象
     * @param ignoreProperties 忽略的字段
     * @param <T>
     * @return
     */
    public static <T> T convert(Object source, Class<T> target, String... ignoreProperties) {
        if (source == null) {
            return null;
        }

        try {
            T t = target.newInstance();
            copyProperties(source, t, ignoreProperties);
            return t;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}