对象序列化/反序列化流

通常用于读写引用类型数据。更多的应用场景是在网络环境下，比如在一台机器上将对象序列化后，通过网络传输到另一台机器上，再经过反序列化就可以使用了。

我们可以这么理解，文件IO处理的是本地磁盘文件，网络IO则处理是的远程服务器或者网络中其他机器上的磁盘文件。

ObjectInputStream。

ObjectOutputStream。

Student类实现Serializable接口

import java.io.Serializable;

public class Student implements Serializable{
	
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private int id;
	private String name;
	private int age;
	
	public Student() {	}
	
	public Student(int id, String name, int age) {
		this.id = id;
		this.name = name;
		this.age = age;
	}

	public int getId() {
		return id;
	}
	public void setId(int id) {
		this.id = id;
	}
	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;
	}
	@Override
	public String toString() {
		return "Student [id=" + id + ", name=" + name + ", age=" + age + "]";
	}

}

测试类：

import java.io.*;
import java.util.*;

public class StudentObjectTest {

	public static void main(String[] args) {
		try {
			test();
		} catch (Exception e) {
			e.printStackTrace();
		}

	}
	public static void test() throws Exception
	{
		List<Student> list = new ArrayList<Student>();
		list.add(new Student(01,"小梁",16));
		list.add(new Student(02,"小张",11));
		list.add(new Student(03,"小赵",15));
		ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("D:/student.dat"));
		oos.writeObject(list);
		oos.close();
		System.out.println("向文件中序列化成功!");
		ObjectInputStream ois = new ObjectInputStream(new FileInputStream("D:/student.dat"));
		Object obj = ois.readObject();
		ois.close();
		if(obj instanceof List)
		{
			List<Object> oList = (List)obj;
			for(Object o:oList)
			{
				if(o instanceof Student)
				{
					Student s = (Student)o;
					System.out.println(s);
				}
			}
		}
	}
}