java对象序列化实例

package com.lj.serialize;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class SerializableTest1
{
	public static void main(String[] args) throws IOException, ClassNotFoundException
	{
		Person p1=new Person(25,"jack",5);
		Person p2=new Person(27,"mike",4);
		Person p3=new Person(50,"joe",4);
	
		FileOutputStream fos=new FileOutputStream("person.txt");
		
		ObjectOutputStream oos=new ObjectOutputStream(fos);
		
		oos.writeObject(p1);
		oos.writeObject(p2);
		oos.writeObject(p3);
		
		oos.close();
		
		
		
		System.out.println("==============");
		FileInputStream fis=new FileInputStream("person.txt");
		
		ObjectInputStream ois=new ObjectInputStream(fis);
		
		Person p=null;
		for(int i=0;i<3;i++){
			p=(Person) ois.readObject();
			System.out.println(p.name+" "+p.age);
		}
		
	}
}


class Person implements Serializable{
	int age;
	
	String name;
	
	double height;

	public Person(int age, String name, double height)
	{
		this.age = age;
		this.name = name;
		this.height = height;
	}
	
	
	
	
	
}

这里我们可以重写serializable接口里面的方法，来具体了解序列化数据的写入和读取的过程：

package com.lj.serialize;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class SerializableTest2
{
	public static void main(String[] args) throws IOException, ClassNotFoundException
	{
		Person2 p1=new Person2(25,"jack",5);
		Person2 p2=new Person2(27,"mike",4);
		Person2 p3=new Person2(50,"joe",4);
	
		FileOutputStream fos=new FileOutputStream("Person2.txt");
		
		ObjectOutputStream oos=new ObjectOutputStream(fos);
		
		oos.writeObject(p1);
		oos.writeObject(p2);
		oos.writeObject(p3);
		
		oos.close();
		
		
		
		System.out.println("==============");
		FileInputStream fis=new FileInputStream("Person2.txt");
		
		ObjectInputStream ois=new ObjectInputStream(fis);
		
		Person2 p=null;
		for(int i=0;i<3;i++){
			p=(Person2) ois.readObject();
			System.out.println(p.name+" "+p.age);
		}
		
	}
}


class Person2 implements Serializable{
	int age;
	
	String name;
	
	double height;

	public Person2(int age, String name, double height)
	{
		this.age = age;
		this.name = name;
		this.height = height;
	}
	
	private void writeObject(ObjectOutputStream out) throws IOException{
		out.writeInt(age);
		//out.writeChars(name);
		out.writeUTF(name);
		System.out.println("write object");
		
		
	}
	
	private void readObject(ObjectInputStream in) throws IOException{
		age=in.readInt();
		name=in.readUTF();
		System.out.println("read object");
	}
	
	
	
	
	
	
}