JAVA 类序列化中的问题

package Iodemo;

import java.io.*;

public class ObjectInputStreamDemo {
    public static void main(String[] args) throws IOException, ClassNotFoundException {
      write();
       read();
    }
    public static  void read() throws IOException, ClassNotFoundException {
        ObjectInputStream obs = new ObjectInputStream(new FileInputStream("./1.txt"));
        Object o = obs.readObject();
        Student s = (Student) o;
        System.out.println(s.getName()+"||"+s.getAge());
    }

    public  static void write() throws IOException {
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("./1.txt"));
        Student s = new Student("张三",20);
        oos.writeObject(s);
        oos.close();
    }
}

需要注意 如果是序列化类 最好设置序列化的版本ID这样就不出现修改类文件后 出现版本不一致异常，对于不想序列化的元素 我们可以通过transient 关键字修饰