這樣做被復制的對象與被復制對象里面的引用都是可以被一并深復制的，不同于Object基類的Clone方法(淺復制：如果被復制的對象存在其他對象的引用，復制一個引用指向原對象的實例)。廢話不多說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");

//下面運行的結果看出對Student的引用Teacher類進行了深復制

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;

}

/**

* 把對象讀到字節流中在讀出來

* @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");

//下面運行的結果看出對Student的引用Teacher類進行了深復制

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;

}

/**

* 把對象讀到字節流中在讀出來

* @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();

}

}

運行結果：

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

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