JAVA 对象深度复制实现

package JAVAImprove;

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

//直接复制引用的句柄

//通过序列化实现深度复制。
public class DeepClone implements Cloneable, Serializable{

private transient LearnClone Lc;

public LearnClone getLc() {
return Lc;
}

public void setLc(LearnClone lc) {
Lc = lc;
}

//注意序列化是不会调用构造函数的。
public DeepClone(){

System.out.println("Constractor");
Lc = new LearnClone();
}

public static void main(String[] args){

DeepClone dc = new DeepClone();

try {
DeepClone dc2 = (DeepClone)dc.clone();

System.out.println("dc start:" + dc.getLc().getCheck());
System.out.println("dc2 start:" + dc2.getLc().getCheck());

//深度复制
ByteArrayOutputStream bo = new ByteArrayOutputStream();
try {
ObjectOutputStream ot = new ObjectOutputStream(bo);

ot.writeObject(dc);

ot.close();

ByteArrayInputStream io = new ByteArrayInputStream(bo.toByteArray());
ObjectInputStream ip = new ObjectInputStream(io);

//try {
DeepClone dc3 = (DeepClone)ip.readObject();

dc3.getLc().setCheck("is Deep Clone");

System.out.println("dc3 end" + dc3.getLc().getCheck());

System.out.println("dc end" + dc.getLc().getCheck());

} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

} catch (CloneNotSupportedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}

package JAVAImprove;

import java.io.Serializable;

public class LearnClone implements Cloneable, Serializable {

private String check = "learn Clone";

public String getCheck() {
return check;
}

public void setCheck(String check) {
this.check = check;
}

@Override
protected Object clone() throws CloneNotSupportedException {
return super.clone();
}

public static void main(String[] args){
//

LearnClone cl = new LearnClone();
cl.setCheck("ttt");

LearnClone c2;
try {
c2 = (LearnClone)cl.clone();
if(c2 == cl){
System.out.println("equal");//首先实现接口可以完成属性的拷贝。
}
System.out.println("start cl" + cl.getCheck());
System.out.println("start c2" + c2.getCheck());
//不是一个值
c2.setCheck("aaaaaaaaaaaaaa");
System.out.println("c2" + c2.getCheck());
System.out.println("C1" + cl.getCheck());

} catch (CloneNotSupportedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

}