一个实现了序列化的对象

package cn.bean.demo.io.object;

import java.io.Serializable;
//如果这个对象拥有一个实例属性【并且这个实例的对象是自定义对象，他必须也要实现序列化，否则person不会成功写入到磁盘中,可以自行验证】
public class Person implements Serializable{

	/**
	 * 对象序列化版本号
	 */
	private static final long serialVersionUID = 8761043201815925119L;
	
	private String name;

	private String sex;
	
	private String age;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getSex() {
		return sex;
	}

	public void setSex(String sex) {
		this.sex = sex;
	}

	public String getAge() {
		return age;
	}

	public void setAge(String age) {
		this.age = age;
	}

	public Person(String name, String sex, String age) {
		super();
		this.name = name;
		this.sex = sex;
		this.age = age;
	}

	@Override
	public String toString() {
		return "Person [name=" + name + ", sex=" + sex + ", age=" + age + "]";
	}
	
	
	

}

读写对象的方法

package cn.bean.demo.io.object;

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 ObjectOutAndInputStreamTest {

	public static void main(String[] args) {
		//testObjectOutputStream();
		testObjectInputStream();
	}

	/**
	 * 将对象写入在磁盘文件中
	 */
	static void testObjectOutputStream() {

		//
		try (OutputStream out = new FileOutputStream("object.txt");
				ObjectOutputStream objectOutputStream = new ObjectOutputStream(out);) {
			// 写入的对象必须实现序列化
			Person person = new Person("nigulas", "男", "20");
			objectOutputStream.writeObject(person);

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

	/**
	 * 读取磁盘文件中的对象信息
	 */
	static void testObjectInputStream() {

		try (InputStream in = new FileInputStream("object.txt");
				ObjectInputStream objectInputStream = new ObjectInputStream(in);)
		{

			Person person= (Person) objectInputStream.readObject();
			System.out.println(person);
			
		} catch (Exception e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

	}

}