JAVA对象序列化

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1、什么是对象序列化

2、案例

在JAVA里，只要相应的类实现Serializable接口（java.io.Serializable）就可以进行序列化和反序列化。

待序列化和反序列化的类Ser，

import java.io.Serializable;public class Ser implements Serializable {private String name="";private int a=0;private static int aa=0;private static String name1="";public Ser() {// TODO Auto-generated constructor stubthis.name="hello";this.name1="hello1";this.a=10;this.aa=100;}@Overridepublic String toString() {// TODO Auto-generated method stubreturn "[name:"+name+" name1:"+name1+" a:"+a+" aa:"+aa+"]";}public String getName() {return name;}public void setName(String name) {this.name = name;}public static String getName1() {return name1;}public static void setName1(String name1) {Ser.name1 = name1;}}

同一个虚拟机测试类：（就是进行序列化后直接进行反序列化）

import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;public class SerTest {public static void main(String[] args) {// TODO Auto-generated method stubSer ser=new Ser();try {//对对象进行序列化ObjectOutputStream objectOutputStream=new ObjectOutputStream(new FileOutputStream("Ser.out"));objectOutputStream.writeObject(ser);objectOutputStream.flush();objectOutputStream.close();//读取对象字节码ObjectInputStream objectInputStream=new ObjectInputStream(new FileInputStream("Ser.out"));Ser object=(Ser)objectInputStream.readObject();objectInputStream.close();//显示System.out.println(object.toString());object.setName("dadada");System.out.println(object.toString());System.out.println(ser.toString());} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

测试结果：

不同虚拟机下进行测试：（开启两个JAVA虚拟机）

import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;public class SerTest {public static void main(String[] args) {// TODO Auto-generated method stub//Ser ser=new Ser();try {////对对象进行序列化//ObjectOutputStream objectOutputStream=new ObjectOutputStream(new FileOutputStream("Ser.out"));//objectOutputStream.writeObject(ser);//objectOutputStream.flush();//objectOutputStream.close();//读取对象字节码ObjectInputStream objectInputStream=new ObjectInputStream(new FileInputStream("D:/workSpeace/Eclipse/JavaSE_2/Serilizable/Ser.out"));Ser object=(Ser)objectInputStream.readObject();objectInputStream.close();//显示System.out.println(object.toString());object.setName("dadada");System.out.println(object.toString());//System.out.println(ser.toString());} catch (FileNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (ClassNotFoundException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

测试结果：

此时必须注意的是，当重新读取被保存的Person对象时，并没有调用Person的任何构造器，看起来就像是直接使用字节将Person对象还原出来的。

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