這樣做被復(fù)制的對(duì)象與被復(fù)制對(duì)象里面的引用都是可以被一并深復(fù)制的，不同于Object基類(lèi)的Clone方法(淺復(fù)制：如果被復(fù)制的對(duì)象存在其他對(duì)象的引用，復(fù)制一個(gè)引用指向原對(duì)象的實(shí)例)。廢話不多說(shuō)Code如下：

[java] view plaincopyprint?

importjava.io.ByteArrayInputStream;

importjava.io.ByteArrayOutputStream;

importjava.io.IOException;

importjava.io.ObjectInputStream;

importjava.io.ObjectOutputStream;

importjava.io.Serializable;

publicclassCloneTest {

publicstaticvoidmain(String[] args)throwsIOException, ClassNotFoundException {

Teacher t =newTeacher();

t.setName("Teacher xin");

t.setAge(30);

Student s =newStudent();

s.setName("Student xiaoxin");

s.setAge(20);

s.setTeacher(t);

System.out.println("s name="+s.getName());

System.out.println("s age="+s.getAge());

System.out.println("s t name="+s.getTeacher().getName());

System.out.println("s t age="+s.getTeacher().getAge());

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

Student sCopy = (Student)s.deepCopy();

sCopy.getTeacher().setName("Teacher mao");

//下面運(yùn)行的結(jié)果看出對(duì)Student的引用Teacher類(lèi)進(jìn)行了深復(fù)制

System.out.println("sCopy t name="+sCopy.getTeacher().getName());

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

System.out.println("s t name="+s.getTeacher().getName());

}

}

classTeacherimplementsSerializable{

privatestaticfinallongserialVersionUID = -2380977769309339400L;

privateString name;

privateintage;

publicintgetAge() {

returnage;

}

publicvoidsetAge(intage) {

this.age = age;

}

publicString getName() {

returnname;

}

publicvoidsetName(String name) {

this.name = name;

}

}

classStudentimplementsSerializable{

privatestaticfinallongserialVersionUID = 739748261443702736L;

privateString name;

privateintage;

publicintgetAge() {

returnage;

}

publicvoidsetAge(intage) {

this.age = age;

}

privateTeacher teacher;

publicTeacher getTeacher() {

returnteacher;

}

publicvoidsetTeacher(Teacher teacher) {

this.teacher = teacher;

}

publicString getName() {

returnname;

}

publicvoidsetName(String name) {

this.name = name;

}

/**

* 把對(duì)象讀到字節(jié)流中在讀出來(lái)

* @return

* @throws IOException

* @throws ClassNotFoundException

*/

publicObject deepCopy()throwsIOException, ClassNotFoundException{

ByteArrayOutputStream bop =newByteArrayOutputStream();

ObjectOutputStream oos =newObjectOutputStream(bop);

oos.writeObject(this);

ByteArrayInputStream bis =newByteArrayInputStream(bop.toByteArray());

ObjectInputStream ois =newObjectInputStream(bis);

returnois.readObject();

}

}

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 CloneTest {

public static void main(String[] args) throws IOException, ClassNotFoundException {

Teacher t = new Teacher();

t.setName("Teacher xin");

t.setAge(30);

Student s = new Student();

s.setName("Student xiaoxin");

s.setAge(20);

s.setTeacher(t);

System.out.println("s name="+s.getName());

System.out.println("s age="+s.getAge());

System.out.println("s t name="+s.getTeacher().getName());

System.out.println("s t age="+s.getTeacher().getAge());

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

Student sCopy = (Student)s.deepCopy();

sCopy.getTeacher().setName("Teacher mao");

//下面運(yùn)行的結(jié)果看出對(duì)Student的引用Teacher類(lèi)進(jìn)行了深復(fù)制

System.out.println("sCopy t name="+sCopy.getTeacher().getName());

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

System.out.println("s t name="+s.getTeacher().getName());

}

}

class Teacher implements Serializable{

private static final long serialVersionUID = -2380977769309339400L;

private String name;

private int age;

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

}

class Student implements Serializable{

private static final long serialVersionUID = 739748261443702736L;

private String name;

private int age;

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

private Teacher teacher;

public Teacher getTeacher() {

return teacher;

}

public void setTeacher(Teacher teacher) {

this.teacher = teacher;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

/**

* 把對(duì)象讀到字節(jié)流中在讀出來(lái)

* @return

* @throws IOException

* @throws ClassNotFoundException

*/

public Object deepCopy() throws IOException, ClassNotFoundException{

ByteArrayOutputStream bop = new ByteArrayOutputStream();

ObjectOutputStream oos = new ObjectOutputStream(bop);

oos.writeObject(this);

ByteArrayInputStream bis = new ByteArrayInputStream(bop.toByteArray());

ObjectInputStream ois = new ObjectInputStream(bis);

return ois.readObject();

}

}

運(yùn)行結(jié)果：

s name=Student xiaoxin s age=20 s t name=Teacher xin s t age=30 ------------------- sCopy t name=Teacher mao ------------------- s t name=Teacher xin

總結(jié)

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