序列化和反序列化

把java中的对象保存在持久化文件中，这就是序列化！

把持久化文件中保存的信息还原为java中的对象，这就是反序列化！

想实现序列化和反序列化必须让对象所在的类实现一个Serializable接口！

public class Student implements Serializable{}

    
　　　　 //序列化
        public static void register() {
        Scanner input = new Scanner (System.in);
        System.out.println("请输入学号");
        int id = input.nextInt();
        System.out.println("请输入年龄：");
        int age = input.nextInt();
        System.out.println("请输入姓名：");
        String name = input.next();
        Student stu = new Student(id, age, name);
        OutputStream out = null;
        ObjectOutputStream oos = null;
        try {
            out = new FileOutputStream("d:/student.txt");
            oos = new ObjectOutputStream(out);
            oos.writeObject(stu);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (SecurityException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }finally{
            try {
                oos.close();
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

 　　　　//反序列化
　　　　 private static void login() {
        InputStream in = null;
        ObjectInputStream ois = null;  
        try {
            in = new FileInputStream("d:/student.txt");
            ois = new ObjectInputStream(in);
            Student stu = (Student) ois.readObject();
            System.out.println(stu.getAge());
            System.out.println(stu.getId());
            System.out.println(stu.getName());
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        
    }