Serializable

6_description.markdown

Serializable

Person.java

import java.io.Serializable;

public class Person implements Serializable {
    private String firstName;
    private String lastName;
    private int age;

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

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public int getAge() {
        return age;
    }

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

SerializableSampleTest.java

import org.junit.Test;

import java.io.*;

import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;

public class SerializableSampleTest {

    @Test
    public void serializableSample() {
        // シリアライズ
        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream("person.txt"))) {
            Person person = new Person("John", "Williams", 55);
            oos.writeObject(person);
        } catch (IOException e) {
            fail(e.getMessage());
        }

        // デシリアライズ
        try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream("person.txt"))) {
            Person dePerson = (Person) ois.readObject();

            assertThat(dePerson.getFirstName(), is("John"));
            assertThat(dePerson.getLastName(), is("Williams"));
            assertThat(dePerson.getAge(), is(55));
        } catch (IOException | ClassNotFoundException e) {
            fail(e.getMessage());
        }

    }
}