Java中的Serializable接口transient关键字，及对象IO

package com.tonyluis;

import java.io.*;

public class Solution {
	public static void main(String args[]) {
		ObjectOutputStream objectos = null;
		SerializableTest myTest = new SerializableTest("str", 12, 1, "123456", 8);
		try {
			objectos = new ObjectOutputStream(new FileOutputStream("test.dat"));
			objectos.writeObject(myTest);
			objectos.flush();
			objectos.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		ObjectInputStream objectin;
		SerializableTest mts = null;
		try {
			objectin = new ObjectInputStream(new FileInputStream("test.dat"));
			mts = (SerializableTest) objectin.readObject();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		System.out.println(mts);
		// 注意，没有覆盖equals()方法，Object类的equals()默认是地址的比较
		System.out.println(mts.equals(myTest));
	}
}

class SerializableTest implements Serializable {
	// 序列化 ID 在 Eclipse 下提供了两种生成策略
	// 一个是固定的 1L，一个是随机生成一个不重复的 long 类型数据（实际上是使用 JDK 工具生成）
	// 如果没有特殊需求，就是用默认的 1L 就可以
	static final long serialVersionUID = 1L;
	String name;
	int num;
	static int staticNum;
	//transient关键字是不能序列化的
	transient String pwd;
	transient int num0;

	SerializableTest(String name, int num, int staticNum, String pwd, int num0) {
		this.name = name;
		this.num = num;
		this.staticNum = staticNum;
		this.pwd = pwd;
		this.num0 = num0;
	}

	public String toString() {
		return "name=" + name + ",num=" + num + ",staticNum=" + staticNum + ",pwd=" + pwd + ",num0=" + num0;
	}
}