对象的二进制输入/输出

package ten;

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



/**
 * @author mz
 * 学习ObjectOutputStream类和ObjectInputStream类
 *
 */

public class ObjectIODemo {
    public static void main(String[] args) {
        try {
            ObjectOutputStream  out = new ObjectOutputStream(new FileOutputStream("luling"));

            //建三个对象
            BeautifulPerson one = new BeautifulPerson("Zhang Jingran", 18);
            BeautifulPerson two = new BeautifulPerson("Zhang Yiran", 17);
            BeautifulPerson three = new BeautifulPerson("Mu Haidong", 27);

            //将三个对象写入文件
            out.writeObject(one);
            out.writeObject(two);
            out.writeObject(three);
            
            //关闭流和文件的连接
            out.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
        try {
            ObjectInputStream  in = new ObjectInputStream(new FileInputStream("luling"));
            
            BeautifulPerson readOne = (BeautifulPerson) in.readObject();
            BeautifulPerson readTwo = (BeautifulPerson) in.readObject();
            BeautifulPerson readThree = (BeautifulPerson) in.readObject();

            System.out.println(readOne);
            System.out.println(readTwo);
            System.out.println(readThree);
            
            in.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } 

    }
}

class BeautifulPerson implements Serializable {
    private String name;
    private int age;
    
    public BeautifulPerson() {
        name = null;
        age = 0;
    }
    
    public BeautifulPerson(String name, int age) {
        this.name = name;
        this.age = age;
    }
    
    //为了输出Person类，一定要有一个toString方法。
    public String toString() {
        return "name: " + name + ", " + "age: " + age;
    }
}