序列化实现原型模式

在 Prototype 类中实现深度克隆（序列化与反序列化），实现 Cloneable,Serializable两接口。

package gupa.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;public class Prototype implements Cloneable,Serializable{    private String name;    private PrototypeBo pb;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public PrototypeBo getPb() {        return pb;    }    public void setPb(PrototypeBo pb) {        this.pb = pb;    }    public Prototype(){}    public Prototype(String name, PrototypeBo pb) {        super();        this.name = name;        this.pb = pb;    }    @Override    public String toString() {        return "Prototype [name=" + name + ", pb=" + pb + "]";    }    public Object clone() throws CloneNotSupportedException {        return this.deepclone();    }         public Object deepclone(){        Prototype copy = null;        try {            ByteArrayOutputStream bos = new ByteArrayOutputStream();            ObjectOutputStream oos = new ObjectOutputStream(bos);            oos.writeObject(this);                        ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());            ObjectInputStream ois = new ObjectInputStream(bis);            copy = (Prototype)ois.readObject();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (ClassNotFoundException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return copy;    }}

在引用对象上实现 Serializable 接口就行了。

package gupa.design.prototype;import java.io.Serializable;public class PrototypeBo implements Serializable{    private String name;    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }    public PrototypeBo(){}    public PrototypeBo(String name) {        super();        this.name = name;    }    @Override    public String toString() {        return "PrototypeBo [name=" + name + "]";    }//    public Object clone() {//        PrototypeBo pb = null;//        try {//            ByteArrayOutputStream bos = new ByteArrayOutputStream();//            ObjectOutputStream oos = new ObjectOutputStream(bos);//            oos.writeObject(this);//            //            ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray());//            ObjectInputStream ois = new ObjectInputStream(bis);//            pb = (PrototypeBo)ois.readObject();//        } catch (IOException e) {//            // TODO Auto-generated catch block//            e.printStackTrace();//        } catch (ClassNotFoundException e) {//            // TODO Auto-generated catch block//            e.printStackTrace();//        }//        return pb;//    }}

测试

package gupa.design.prototype;public class test {    public static void main(String[] args) {        Prototype p = new Prototype();        p.setName("aaa");        PrototypeBo pb = new PrototypeBo("abc");        p.setPb(pb);        Prototype p1 = null;        try {            p1 = (Prototype)p.clone();        } catch (CloneNotSupportedException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        //        PrototypeBo pb1 = (PrototypeBo)pb.clone();        System.out.println(p==p1);        System.out.println(p.getPb()==p1.getPb());        System.out.println(p.hashCode()+"-----"+p1.hashCode());        System.out.println(p.getPb().hashCode()+"-----"+p1.getPb().hashCode());    }}

实现效果:

falsefalse1118140819-----10786947892101973421-----1831932724