序列化：用ObjectOutputStream类保存基本类型数据或对象的机制

反序列化：用ObjectInputStream类读取基本类型数据或对象的机制

ObjectOutputStream和ObjectInputStream不能序列化static和transient修饰的成员变量

1. 以String为例测试

package mytest;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;

public class ObjectOutputStreamTest {

    public static void main(String[] args) {

        ObjectOutputStream oos = null;
        try {
            oos = new ObjectOutputStream(new FileOutputStream("object.data"));

            oos.writeObject(new String("这是一个测试！"));
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                oos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

    }

}

package mytest;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;

public class ObjectInputStreamTest {

    public static void main(String[] args) {

        ObjectInputStream ois = null;
        try {
            ois = new ObjectInputStream(new FileInputStream("object.data"));

            Object obj = ois.readObject();

            String str = (String)obj;

            System.out.println(str);
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } finally {
            try {
                ois.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }


}

2. 自定义类person测试

   2.1 自定义类序列化需要实现接口：Serializable

   2.2 提供一个全局常量：serialVersionUID

package mytest;

import java.io.Serializable;

public class Person implements Serializable {


    private static final long serialVersionUID = 537106506708875853L;

    private String name;
    private int age;

    public Person() {
    }

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

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

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

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

}

package mytest;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectOutputStream;

public class ObjectOutputStreamTest2 {

    public static void main(String[] args) {

        ObjectOutputStream oos = null;

        try {
            oos = new ObjectOutputStream(new FileOutputStream("object.data"));

            oos.writeObject(new Person("张三",30));

        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                oos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

    }

}

package mytest;

import java.io.FileInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;

public class ObjectInputStreamTest2 {

    public static void main(String[] args) {

        ObjectInputStream ois = null;
        try {
            ois = new ObjectInputStream(new FileInputStream("object.data"));

            Object obj = ois.readObject();

            Person p = (Person) obj;

            System.out.println(p);

        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } finally {
            try {
                ois.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }
}