对象序列化

不能序列化的情况

没有实现了Serializable接口的类static静态字段transient 修饰的字段只是子类实现了Serializable接口，而父类没有实现，则父类字段不能被序列化

注意： 父类实现了Serializable接口，则子类能够被序列化

//在属性发生变化后【比如添加字段】，也能够反序列化成功。兼容历史数据 //有serialVersionUID才可以加字段 private static final long serialVersionUID = 8358532000092354056L; package com.accdays.base; import com.alibaba.fastjson.JSON; import java.io.*; /** * @author * @version 1.0 * @description * @updateRemark * @updateUser * @createDate 2019/7/18 17:11 * @updateDate 2019/7/18 17:11 **/ public class SerializableTest { public static void main(String[] args) throws IOException , ClassNotFoundException { // FlyPig flyPig=new FlyPig("奔驰","飞猪1","red"); FlyPig flyPig=new FlyPig("benchi","pig_1","red"); // serializ(flyPig); FlyPig flyPig2=(FlyPig)deserializ(); System.out.println(JSON.toJSONString(flyPig2)); } //序列化 static void serializ(Object object) throws IOException { File file=new File("E:/ser.txt"); try (ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream(file))) { objectOutputStream.writeObject(object); } } static Object deserializ() throws IOException, ClassNotFoundException { Object result=null; try( ObjectInputStream objectInputStream = new ObjectInputStream(new FileInputStream("E:/ser.txt")) ){ result=objectInputStream.readObject(); } return result; } } class FlyPig implements Serializable { //在属性发生变化后【比如添加字段】，也能够反序列化成功。兼容历史数据 //有serialVersionUID才可以加字段 private static final long serialVersionUID = 8358532000092354056L; //静态字段不能序列化 private static String AGE="269"; // transient 不能序列化 transient private String carName; private String name; private String color; private String addFile; public FlyPig() { } public FlyPig(String carName, String name, String color) { this.carName = carName; this.name = name; this.color = color; } public String getCarName() { return carName; } public void setCarName(String carName) { this.carName = carName; } public String getName() { return name; } public void setName(String name) { this.name = name; } public String getColor() { return color; } public void setColor(String color) { this.color = color; } public String getAddFile() { return addFile; } public void setAddFile(String addFile) { this.addFile = addFile; } }