java 克隆对象 解析JAVA深度克隆与浅度克隆的区别介绍
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在JAVA克隆对象不能简单的使用clone方法，clone方法只是进行浅克隆。请看下方：深度克隆类：
Java代码
复制代码 代码如下:
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
public class DepthClone {
public final static Object objectCopy(Object oldObj) {
Object newObj = null;
try {
ByteArrayOutputStream bo = new ByteArrayOutputStream();
ObjectOutputStream oo = new ObjectOutputStream(bo);
oo.writeObject(oldObj);//源对象
ByteArrayInputStream bi = new ByteArrayInputStream(bo.toByteArray());
ObjectInputStream oi= new ObjectInputStream(bi);
newObj = oi.readObject();//目标对象
} catch (IOException e) {
e.printStackTrace();
}catch (ClassNotFoundException e) {
e.printStackTrace();
}
return newObj;
}
}
浅度克隆类：
Java代码
复制代码 代码如下:
import java.io.Serializable;
public class SimpleClone implements Cloneable ,Serializable {
private static final long serialVersionUID = -7552721152118950502L;
public String s = null;
public Object o = null;
public CloneObject cloneObject = null;
public SimpleClone(CloneObject cloneObject) {
this.cloneObject = cloneObject;
}
public Object clone() {
SimpleClone newSimpleClone = null;
try {
/* 浅克隆 */
newSimpleClone = (SimpleClone)super.clone();
} catch (CloneNotSupportedException e) {
e.printStackTrace();
}
return newSimpleClone;
}
}
克隆对象：
Java代码
复制代码 代码如下:
import java.io.Serializable;
public class CloneObject implements Serializable{
private static final long serialVersionUID = 4332788486669750696L;
private String name ;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
克隆测试：
Java代码
复制代码 代码如下:
public class TestClone {
public static void main(String[] arg) {
CloneObject obj1 = new CloneObject();
obj1.setName("cloneOne");
CloneObject obj2 = new CloneObject();
obj2.setName("cloneTwo");
SimpleClone simpleClone1 = new SimpleClone(obj1);
SimpleClone simpleClone2 = new SimpleClone(obj2);
simpleClone1.s = "simpleClone1";
simpleClone1.o = "simpleClone1Object";
//simpleClone2 = (SimpleClone)simpleClone1.clone();
simpleClone2 = (SimpleClone)DepthClone.objectCopy(simpleClone1);
/* 如果是浅克隆， simpleClone1中的cloneObject会随着simpleClone2的cloneObject改变面改变*/
simpleClone2.cloneObject.setName("cloneThree");
System.out.println(simpleClone1.cloneObject.getName());
System.out.println(simpleClone2.cloneObject.getName());
}
}
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