设计模式-原型模式

代码语言：javascript复制

package com.shi.design.prototype;

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

/**
 * @author shiye
 *
 */
public class Sleep implements Cloneable,Serializable{
	
	private String name;
	
	private String age;
	
	private String add;
	
	//对象中有一个引用对象类型的羊
	private Sleep friend;

	@Override
	public String toString() {
		return "Sleep [name="   name   ", age="   age   ", add="   add   ", friend="   friend   ", getName()="
				  getName()   ", getAge()="   getAge()   ", getAdd()="   getAdd()   ", getFriend()="   getFriend()
				  ", getClass()="   getClass()   ", hashCode()="   hashCode()   ", toString()="   super.toString()
				  "]";
	}


	public Sleep(String name, String age, String add, Sleep friend) {
		super();
		this.name = name;
		this.age = age;
		this.add = add;
		this.friend = friend;
	}


	public String getName() {
		return name;
	}


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


	public String getAge() {
		return age;
	}


	public void setAge(String age) {
		this.age = age;
	}


	public String getAdd() {
		return add;
	}


	public void setAdd(String add) {
		this.add = add;
	}


	public Sleep getFriend() {
		return friend;
	}


	public void setFriend(Sleep friend) {
		this.friend = friend;
	}

	//深拷贝的俩重方式
	//方式一 ：使用自己重写父方法colne方法实现克隆
	@Override
	protected Object clone() throws CloneNotSupportedException {
		Sleep sleep = (Sleep)super.clone();//实现浅拷贝
		if(sleep.getFriend() != null) {
			sleep.setFriend((Sleep)sleep.getFriend().clone()); //引用对象需要自己实现拷贝
		}
		return sleep;
	}
	
	// 方式二：通过序列化的方式实现深拷贝 （推荐使用 效率高）
	public Object deepClone() {
		
		Sleep copyObj = null;
		
		//1 创建流对象
		ByteArrayOutputStream bos = null;
		ObjectOutputStream oos = null;
		ByteArrayInputStream bis = null;
		ObjectInputStream ois = null;
		
		try {
			//2 序列化
			bos = new ByteArrayOutputStream();
			oos = new ObjectOutputStream(bos);
			oos.writeObject(this);
			
			//3 反序列化
			bis = new ByteArrayInputStream(bos.toByteArray());
			ois = new ObjectInputStream(bis);
			copyObj = (Sleep)ois.readObject();
		} catch (Exception e) {
			e.printStackTrace();
		}finally {
			try {
				if(bos != null ) {
					bos.close();
				}
				if(oos != null ) {
					oos.close();
				}
				if(bis != null ) {
					bis.close();
				}
				if(ois != null ) {
					ois.close();
				}
			} catch (IOException e2) {
				e2.printStackTrace();
			}
		}
		return copyObj;
	}

}

代码语言：javascript复制

package com.shi.design.prototype;

public class Test1 {

	public static void main(String[] args) throws CloneNotSupportedException {
		Sleep sleep1 = new Sleep("小阳","12","地球村",new Sleep("朋友", "10", "不确定", null));
		Sleep sleep2 = (Sleep) sleep1.clone();
		
		System.out.println("使用 方式一 实现的深拷贝~~");
		System.out.println("sleep1.hashCode() = "   sleep1.hashCode()   "/sleep1.getFriend().hashCode() = "   sleep1.getFriend().hashCode());
		System.out.println("sleep2.hashCode() = "   sleep2.hashCode()   "/sleep2.getFriend().hashCode() = "   sleep2.getFriend().hashCode());
	
		System.out.println("使用 方式二 实现的深拷贝~~");
		Sleep sleep3 = (Sleep)sleep1.deepClone();
		System.out.println("sleep3.hashCode() = "   sleep3.hashCode()   "/sleep3.getFriend().hashCode() = "   sleep3.getFriend().hashCode());
	}

}

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