//注意对象类要打标记实现Serializable接口

 package com.gh;

 import java.io.FileInputStream;

 import java.io.FileNotFoundException;

 import java.io.FileOutputStream;

 import java.io.IOException;

 import java.io.InputStream;

 import java.io.ObjectInputStream;

 import java.io.ObjectOutputStream;

 import java.io.OutputStream;

 public class ObjectStreamDemo {

     /**

      * 对象序列化

      * 把对象写入到文件中

      */

     public static void writeobject(){

         try {

             OutputStream out =new FileOutputStream("1.gh");

             ObjectOutputStream oos=new ObjectOutputStream(out);

             Person p=new Person("小白", 8);

             oos.writeObject(p);

             oos.close();

         } catch (FileNotFoundException e) {

             e.printStackTrace();

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

     /**

      * 对象的反序列化，

      * 从文件中读取对象

      */

     public static void readobject(){

         try {

             InputStream in=new FileInputStream("1.gh");

             ObjectInputStream ois=new ObjectInputStream(in);

             Person ps=(Person)ois.readObject();

             in.close();

             System.out.println(ps);

         } catch (FileNotFoundException e) {

             e.printStackTrace();

         } catch (IOException e) {

             e.printStackTrace();

         } catch (ClassNotFoundException e) {

             e.printStackTrace();

         }

     }

     public static void main(String[] args) {

         //writeobject();

         readobject();

     }

 }

 package com.gh;

 import java.io.Serializable;

 public class Person implements Serializable{//标记可以序列化

     private String name;

     private int age;

     public String getName() {

         return name;

     }

     public void setName(String name) {

         this.name = name;

     }

     public int getAge() {

         return age;

     }

     public void setAge(int age) {

         this.age = age;

     }

     public Person() {

         super();

     }

     public Person(String name, int age) {

         this.name = name;

         this.age = age;

     }

     @Override

     public String toString() {

         return "Person [name=" + name + ", age=" + age + "]";

     }

 }