java深克隆浅克隆
浅克隆：只复制当前类的简单属性
深克隆：复制当前类中的简单属性及复杂类型属性。
可能说的不是太清楚，运行如下代码就都清楚啦！
Student.java
package com.hitachi.clone;
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
Student
implements
Cloneable,Serializable {
/**
*
@Fields
serialVersionUID :
TODO
变量名称
*/
private
static
final
long
serialVersionUID
= 5474483935180730022L;
private
String
name
;
private
Integer
age
;
private
Professor
professor
;
public
String getName() {
return
name
;
}
public
void
setName(String
name
) {
this
.
name
=
name
;
}
public
Integer getAge() {
return
age
;
}
public
void
setAge(Integer
age
) {
this
.
age
=
age
;
}
public
Professor getProfessor() {
return
professor
;
}
public
void
setProfessor(Professor
professor
) {
this
.
professor
=
professor
;
}
/**
*
*
@Description
：浅克隆
*
@return
: 返回结果描述
*
@return
Object: 返回值类型
*
@throws
*/
public
Object shallowClone() {
Object
o
=
null
;
try
{
o
=
super
.clone();
//Object 中的clone()识别出你要复制的是哪一个对象。
}
catch
(CloneNotSupportedException
e
) {
System.
out
.println(
e
.toString());
}
return
o
;
}
/**
*
*
@Description
：深克隆
*
@return
*
@throws
IOException
*
@throws
ClassNotFoundException: 返回结果描述
*
@return
Object: 返回值类型
*
@throws
*/
public
Object deepClone()
throws
IOException, ClassNotFoundException{
ByteArrayOutputStream
out
=
new
ByteArrayOutputStream();
ObjectOutputStream
oos
=
new
ObjectOutputStream(
out
);
oos
.writeObject(
this
);
ByteArrayInputStream
input
=
new
ByteArrayInputStream(
out
.toByteArray());
ObjectInputStream
ois
=
new
ObjectInputStream(
input
);
return
ois
.readObject();
}
@Override
public
String toString() {
return
"Student [name="
+
name
+
", age="
+
age
+
", professor="
+
professor
+
"]"
;
}
}
Professor.java
package
com.hitachi.clone;
import
java.io.Serializable;
public
class
Professor
implements
Serializable {
/**
*
@Fields
serialVersionUID :
TODO
变量名称
*/
private
static
final
long
serialVersionUID
= -3321860827572727878L;
private
String
name
;
private
Integer
age
;
public
String getName() {
return
name
;
}
public
void
setName(String
name
) {
this
.
name
=
name
;
}
public
Integer getAge() {
return
age
;
}
public
void
setAge(Integer
age
) {
this
.
age
=
age
;
}
@Override
public
String toString() {
return
"Professor [name="
+
name
+
", age="
+
age
+
"]"
;
}
}
Test.java
package
com.hitachi.clone;
import
java.io.IOException;
public
class
Test {
public
static
void
main(String[]
args
) {
Student
stu
=
new
Student();
stu
.setAge(23);
stu
.setName(
"小鸟"
);
Professor
pro
=
new
Professor();
pro
.setAge(42);
pro
.setName(
"大鸟"
);
stu
.setProfessor(
pro
);
Student
stu2
=(Student)
stu
.shallowClone();
stu2
.setAge(24);
stu2
.setName(
"小小"
);
stu2
.getProfessor().setAge(43);
System.
out
.println(
stu
);
System.
out
.println(
stu2
);
Student
stu1
=
new
Student();
stu1
.setAge(23);
stu1
.setName(
"小鸟"
);
Professor
pro1
=
new
Professor();
pro1
.setAge(42);
pro1
.setName(
"大鸟"
);
stu1
.setProfessor(
pro1
);
try
{
Student
stu3
= (Student)
stu1
.deepClone();
stu3
.setAge(24);
stu3
.setName(
"小小"
);
stu3
.getProfessor().setAge(44);
System.
out
.println(
stu1
);
System.
out
.println(
stu3
);
}
catch
(ClassNotFoundException
e
) {
e
.printStackTrace();
}
catch
(IOException
e
) {
e
.printStackTrace();
}
}
}