java23设计模式原型模式

浅克隆

package com.bjsxt.prototype;

import java.io.Serializable;
import java.util.Date;


public class Sheep implements Cloneable,Serializable {   //1997,英国的克隆羊，多利！
    private String sname;
    private Date birthday;
    
    @Override
    protected Object clone() throws CloneNotSupportedException {
        Object obj = super.clone();  //直接调用object对象的clone()方法！
        return obj;
    }

    public String getSname() {
        return sname;
    }
    public void setSname(String sname) {
        this.sname = sname;
    }
    public Date getBirthday() {
        return birthday;
    }
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }
    public Sheep(String sname, Date birthday) {
        super();
        this.sname = sname;
        this.birthday = birthday;
    }
    public Sheep() {
    }
}

package com.bjsxt.prototype;

import java.util.Date;

/**
 * 测试原型模式(浅克隆)
 * @author 尚学堂高淇 www.sxt.cn
 *
 */
public class Client {
    public static void main(String[] args) throws Exception {
        Date date = new Date(12312321331L);
        Sheep s1 = new Sheep("少利",date);
        System.out.println(s1);
        System.out.println(s1.getSname());
        System.out.println(s1.getBirthday());
        Sheep s2 = (Sheep) s1.clone();

        date.setTime(23432432423L);
        
        System.out.println(s1.getBirthday());
        

        s2.setSname("多利");
        System.out.println(s2);
        System.out.println(s2.getSname());
        System.out.println(s2.getBirthday());
/**
 * com.bjsxt.prototype.Sheep@42a57993
 * 少利
 * Sat May 23 20:05:21 CST 1970
 * Tue Sep 29 13:00:32 CST 1970
 * com.bjsxt.prototype.Sheep@74a14482
 * 多利
 * Tue Sep 29 13:00:32 CST 1970
 */
        
    }
}

深克隆

package com.bjsxt.prototype;

import java.util.Date;


//测试深复制
public class Sheep2 implements Cloneable {   //1997,英国的克隆羊，多利！
    private String sname;
    private Date birthday;
    
    
    @Override
    protected Object clone() throws CloneNotSupportedException {
        Object obj = super.clone();  //直接调用object对象的clone()方法！
        
        
        //添加如下代码实现深复制(deep Clone)
        Sheep2 s = (Sheep2) obj;
        s.birthday = (Date) this.birthday.clone();  //把属性也进行克隆！
        
        return obj;
    }


    public String getSname() {
        return sname;
    }


    public void setSname(String sname) {
        this.sname = sname;
    }
    public Date getBirthday() {
        return birthday;
    }
    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    public Sheep2(String sname, Date birthday) {
        super();
        this.sname = sname;
        this.birthday = birthday;
    }
    public Sheep2() {
    }
    
}

package com.bjsxt.prototype;

import java.util.Date;

/**
 * 原型模式(深复制)
 * @author 尚学堂高淇www.sxt.cn
 *
 */
public class Client2 {
    public static void main(String[] args) throws CloneNotSupportedException {
        Date date = new Date(12312321331L);
        Sheep2 s1 = new Sheep2("少利",date);
        Sheep2 s2 = (Sheep2) s1.clone();   //实现深复制。s2对象的birthday是一个新对象！
        
        
        System.out.println(s1);
        System.out.println(s1.getSname());
        System.out.println(s1.getBirthday());
        
        date.setTime(23432432423L);
        
        System.out.println(s1.getBirthday());
        
        
        s2.setSname("多利");
        System.out.println(s2);
        System.out.println(s2.getSname());
        System.out.println(s2.getBirthday());
        /**
         * com.bjsxt.prototype.Sheep2@42a57993
         * 少利
         * Sat May 23 20:05:21 CST 1970
         * Tue Sep 29 13:00:32 CST 1970
         * com.bjsxt.prototype.Sheep2@74a14482
         * 多利
         * Sat May 23 20:05:21 CST 1970
          */    
        
        
    }
}

 深克隆 -对象流

package com.bjsxt.prototype;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.Date;

/**
 * 原型模式(深复制,使用序列化和反序列化的方式实现深复制)
 * @author 尚学堂高淇www.sxt.cn
 *
 */
public class Client3 {
    public static void main(String[] args) throws CloneNotSupportedException, Exception {
        Date date = new Date(12312321331L);
        Sheep s1 = new Sheep("少利",date);
        System.out.println(s1);
        System.out.println(s1.getSname());
        System.out.println(s1.getBirthday());

        
//        使用序列化和反序列化实现深复制
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ObjectOutputStream    oos = new ObjectOutputStream(bos);
        oos.writeObject(s1);
        byte[] bytes = bos.toByteArray();
        
        ByteArrayInputStream  bis = new ByteArrayInputStream(bytes);
        ObjectInputStream      ois = new ObjectInputStream(bis);
        
        Sheep s2 = (Sheep) ois.readObject();   //克隆好的对象！
        
        System.out.println("修改原型对象的属性值");  
        date.setTime(23432432423L);
        
        System.out.println(s1.getBirthday());
        
        s2.setSname("多利");
        System.out.println(s2);
        System.out.println(s2.getSname());
        System.out.println(s2.getBirthday());
        /**
         * com.bjsxt.prototype.Sheep@42a57993
         * 少利
         * Sat May 23 20:05:21 CST 1970
         * 修改原型对象的属性值
         * Tue Sep 29 13:00:32 CST 1970
         * com.bjsxt.prototype.Sheep@6acbcfc0
         * 多利
         * Sat May 23 20:05:21 CST 1970
         */
        
    }
}