Java的序列化和反序列化

Java的序列化和反序列化

        package com.IO;
        //自定义类：序列化
        import java.io.*;
        //Serializable必须调用他的String中的接口；否者序列号异常==重点
        public class Demo02 implements Serializable {
            //serialVersionUID为java序列号；用于反序列话识别==重点
            public static final long serialVersionUID = 12L;
            private String name;
            private double hight;

            public Demo02(String name, double hight) {
                this.name = name;
                this.hight = hight;
            }

            public String getName() {
                return name;
            }

            public void setName(String name) {
                this.name = name;
            }

            public double getHight() {
                return hight;
            }

            public void setHight(double hight) {
                this.hight = hight;
            }

            @Override
            public String toString() {
                return "Demo02{" +
                        "name='" + name + '\'' +
                        ", hight=" + hight +
                        '}';
            }

            public Demo02() {
            }
        }

        class Demo03{
            public static void main(String[] args) throws IOException {
                Demo02 demo02 = new Demo02("小茹",160.5);

                File file =new File("D://IDEA/Demo.txt");
                FileOutputStream fileOutputStream =new FileOutputStream(file);
                ObjectOutputStream objectOutputStream  = new ObjectOutputStream(fileOutputStream);
                objectOutputStream.writeObject(demo02);
                objectOutputStream.close();
            }
        }

进行反序列化

1. 序列号内部类的对象必须是Serializable；有序列化标识
2. 常量可以使用；引用数据类型String是序列号
3. 用Static，transient修饰的属性不可序列化；transient为了保护密码；防止序列化引用

        package com.IO;

        import java.io.*;

        public class Test011 {
            public static void main(String[] args) throws IOException, ClassNotFoundException {
                File file = new File("D://IDEA/Demo.txt");
                FileInputStream fileInputStream =new FileInputStream(file);
                ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream);
                Object o = objectInputStream.readObject();
                System.out.println(o);
            }
        }