序列化Demo

import java.io.Serializable;/** * Serializable要序列化的类，必须实现Serializable接口 * @author Join * */public class User implements Serializable {public String userName;public String age;public User(String userName, String age) {this.userName = userName;this.age = age;}public String sayHello() {return "User [userName=" + userName + ", age=" + age + "]";}}