serializetest.java

孙鑫JAVA从入门到精通配套练习程序。所有程序都实际运行过

import java.io.*;
class SerializeTest
{
	public static void main(String[] args) throws FileNotFoundException, IOException, ClassNotFoundException
	{
		Student s1 = new Student(1, "zhangshan", 98.5);
		Student s2 = new Student(2, "lisi", 96.5);
		Student s3 = new Student(3, "wangwu", 90.5);
		FileOutputStream fos = new FileOutputStream("Student2.txt");
		ObjectOutputStream oos = new ObjectOutputStream(fos);
		oos.writeObject(s1);
		oos.writeObject(s2);
		oos.writeObject(s3);
		oos.close();
		
		FileInputStream fis = new FileInputStream("Student2.txt");
		ObjectInputStream ois = new ObjectInputStream(fis);
		Student s;
		for (int i=0; i<3; i++)
		{
			s = (Student)ois.readObject();
			System.out.println(s.num + ":" + s.name + ":" + s.score);
		}
		ois.close();
		
		
	}
}

class Student implements Serializable
{
	int num;
	String name;
	double score;
	
	Student(int num, String name, double score)
	{
		this.num = num;
		this.name = name;
		this.score = score;
	}
	private void writeObject(ObjectOutputStream oos) throws IOException
	{
		System.out.println("Object write");
		oos.writeInt(num);
		oos.writeUTF(name);
		//System.out.println("Object write");
	}
	private void readObject(ObjectInputStream ois) throws IOException
	{
		System.out.println("Object read");
		num = ois.readInt();
		name = ois.readUTF();
	}
	
}