序列化问题

package interview.serializable;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.Serializable;

import junit.framework.TestCase;

public class InnerSerialDemo extends TestCase implements Serializable
{

	public void testSerial()
	{
		ByteArrayOutputStream bos = new ByteArrayOutputStream();

		try
		{
			ObjectOutputStream oos = new ObjectOutputStream(bos);
			oos.writeObject(new Student("xiaolong", 23));
		}
		catch (IOException e)
		{
			e.printStackTrace();
		}

		assertTrue(bos.toByteArray().length > 0);

	}

	// 如果是非静态类，则外部类必须serailizable
	// 如果是静态内部类，则外部不需要
	private class Student implements Serializable
	{
		private String name;

		// 不被序列化的字段
		transient private int age;

		public Student(String name, int age)
		{
			this.name = name;
			this.age = age;
		}

		public String toString()
		{
			return "name=" + this.name + ",age=" + this.age;
		}
	}

}