使用Hutool完成浅克隆和深克隆 Qi

import java.io.Serializable;
import java.util.ArrayList;
import java.util.List;

import cn.hutool.core.clone.CloneRuntimeException;
import cn.hutool.core.clone.Cloneable;
import cn.hutool.core.util.ObjectUtil;

abstract class Pet implements Serializable {
    private static final long serialVersionUID = 6949926634898983095L;
    protected String name;
    
    public Pet() {
        super();
    }
    public Pet(String name) {
        super();
        this.name = name;
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Pet other = (Pet) obj;
        if (name == null) {
            if (other.name != null)
                return false;
        } else if (!name.equals(other.name))
            return false;
        return true;
    }
}

class Dog extends Pet {
    private static final long serialVersionUID = 5872302442689438099L;
    
    public Dog() {
        super();
    }
    public Dog(String name) {
        super(name);
    }
    public void bark () {
        System.out.print(name + "犬吠");
    }
    @Override
    public String toString() {
        return "Dog [name=" + name + "]";
    }
}

class Student implements Cloneable<Student>, Serializable{
    private static final long serialVersionUID = -7925019110753655045L;
    
    private String name;
    private int age;
    private List<Pet> pets;
    public Student() {
        super();
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public List<Pet> getPets() {
        return pets;
    }
    public void setPets(List<Pet> pets) {
        this.pets = pets;
    }
    @Override
    public String toString() {
        return "Student [name=" + name + ", age=" + age + ", pets=" + pets
                + "]";
    }
    @Override
    public Student clone() {
        try {
            Student student =  (Student)super.clone();
            return student;
        } catch (CloneNotSupportedException e) {
            throw new CloneRuntimeException(e);
        }
    }
    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + age;
        result = prime * result + ((name == null) ? 0 : name.hashCode());
        result = prime * result + ((pets == null) ? 0 : pets.hashCode());
        return result;
    }
    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Student other = (Student) obj;
        if (age != other.age)
            return false;
        if (name == null) {
            if (other.name != null)
                return false;
        } else if (!name.equals(other.name))
            return false;
        if (pets == null) {
            if (other.pets != null)
                return false;
        } else if (!pets.equals(other.pets))
            return false;
        return true;
    }
}

public class CloneTest {
    public static void main(String[] args) {
        List<Pet> pets = new ArrayList<>();
        pets.add(new Dog("柯基"));
        
        Student s1 = new Student();
        s1.setName("小明");
        s1.setAge(12);
        s1.setPets(pets);
        
        Student s2 = s1.clone(); // 浅克隆
        Student s3 = ObjectUtil.cloneByStream(s1); // 深克隆，注意：执行深克隆时，该类以及该类的成员变量所属的类都需要实现Serializable接口
        Student s4 = ObjectUtil.clone(s1); // 当克隆的对象所属的类实现了Cloneable接口后，执行浅克隆，否则执行深克隆
//        System.out.println(s1 == s2);
//        System.out.println(s1.equals(s2));
//        System.out.println(s1 == s3);
//        System.out.println(s1.equals(s3));
//        System.out.println(s1 == s4);
//        System.out.println(s1.equals(s4));

        System.out.println(s1.getPets() == s4.getPets()); // true
        System.out.println(s1.getPets() == s3.getPets()); // false
        System.out.println(s1.equals(s3)); // true
//        System.out.println(s2);
        System.out.println(s3);
//        System.out.println(s4);
    }
}