对象序列化

    对象序列化是Java中高级的使用，简单的说对象序列化就是使得对象能在不运行程序的时候，保存对象的信息，以便以后使用。Java中序列化是通过实现Serializable接口使用，一旦实现了Serializable接口，必须有一个相应的唯一的序列号。下面是简单的代码，阐述Serializable的使用。

package Test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;

public class MySerializable implements Serializable {

	/**
	 * 
	 */
	private static final long serialVersionUID = -4942632787062986217L;

	public String name;
	public String city;
	public int age;

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

	public void write(MySerializable test) {
		FileOutputStream fileout;
		ObjectOutputStream out = null;
		try {
			fileout = new FileOutputStream(new File("f:\\test.txt"));
			out = new ObjectOutputStream(fileout);
			out.writeObject(test);
			out.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public void read(ObjectInputStream filein){
		try {
			MySerializable  object=(MySerializable) filein.readObject();
			System.out.println(object.name);
			System.out.println(object.city);
			System.out.println(object.age);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	
	public static void main(String[] args){
		MySerializable test = new MySerializable("yushu1987","Beijing",24);
		test.write(test);
		try {
			ObjectInputStream in=new ObjectInputStream(new FileInputStream(new File("f:\\test.txt")));
			test.read(in);
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

    其中ObjectInputStream与ObjectOutputStream是对象读写的IO流，为了以文件存储，这里需要以FileInputStream和FileOutputStream作为封装对象。而WriteObject和ReadObject方法用于读写对象。下面结果证明序列化的正确性：

yushu1987
Beijing
24