软件设计⑥|原型模式（深克隆、浅克隆）

一、原型模式

https://baike.baidu.com/item/%E6%8A%BD%E8%B1%A1%E5%B7%A5%E5%8E%82%E6%A8%A1%E5%BC%8F/2361182?fr=aladdin

二、代码

①类图：

②效果图：

③目录结构：

④代码：

Book.java

package clone;

import java.io.Serializable;

public class Book implements Serializable{

    private String name;

    public Book(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

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

Client.java

package clone;

public class Client {
    public static void main(String[] args){
        Book book = new Book("Chinese");
        Student s = new Student("Tom",12,book);
        
        //浅克隆
        System.out.println("浅克隆");
        Student s1 = s.clone();

        System.out.println(s==s1);
        System.out.println(s.getClass()==s1.getClass());
        System.out.println(s.getBook()==s1.getBook());

        System.out.println("------------------------");

        try {
            //深克隆
            System.out.println("深克隆");
            Student s2 = s.deepClone();

            System.out.println(s==s2);
            System.out.println(s.getClass()==s2.getClass());
            System.out.println(s.getBook()==s2.getBook());

            System.out.println("-------------------");
            System.out.println("s.age:"+s.getAge()+" s2.age:"+s2.getAge());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Student.java

package clone;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class Student implements Cloneable ,Serializable{

    private String name;
    private transient int age;
    private Book book;

    //浅克隆
    public Student clone(){
        Student stu = null;
        try {
            stu = (Student) super.clone();
        } catch (CloneNotSupportedException e) {
            e.printStackTrace();
        }
        return stu;
    }

    //深克隆
    public Student deepClone() throws Exception {
        Student stu = null;
        ByteArrayOutputStream bo = new ByteArrayOutputStream();
        ObjectOutputStream oos = new ObjectOutputStream(bo);
        oos.writeObject(this);
        ByteArrayInputStream bi = new ByteArrayInputStream(bo.toByteArray());
        ObjectInputStream oi = new ObjectInputStream(bi);
        stu = (Student) oi.readObject();
        return stu;
    }


    public Student(String name, int age, Book book) {
        this.name = name;
        this.age = age;
        this.book = book;
    }

    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 Book getBook() {
        return book;
    }

    public void setBook(Book book) {
        this.book = book;
    }
}

参考链接：https://blog.csdn.net/yaoliao_11/article/details/53386044