Sequence and anti-sequence

Serialization
Deserialization
transient

Serialization (the ObjectOutputStream)

Serialization: class can be converted into binary data transmission ( implements Serializable class can be serialized )

ObjectOutputStream(序列化) implements OutputStream。

A simple example:

class Animal implements Serializable{
    private String eat;
    private String write;

    public Animal() {
    }

    public Animal(String eat, String write) {
        this.eat = eat;
        this.write = write;
    }

    public String getEat() {
        return eat;
    }

    public void setEat(String eat) {
        this.eat = eat;
    }

    @Override
    public String toString() {
        return "eat：" + this.eat + "、write：" + this.write;
    }
}

public class Demo01 {
    private static final File ANIMAL_FILE = new File("D:" + File.separator + "Hello.ses");
    public static void main(String[] args) throws Exception {
        test();
        System.out.println(detest());
    }

    public static void test() throws Exception {
        Animal an = new Animal("饭","水");
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(ANIMAL_FILE));
        oos.writeObject(an);
        oos.close();
    }
}

Deserialize (the ObjectInputStream)

By ObjectOutputStream.readObject () can read ObjectOutputStream.writeObject () information output.

ObjectInputStream(序列化) implements InputStream

A simple example:

public class Demo01 {
    private static final File ANIMAL_FILE = new File("D:" + File.separator + "Hello.ses");
    public static void main(String[] args) throws Exception { 
        detest();
    }
    public static void detest() throws Exception {
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(ANIMAL_FILE));
        Animal an = (Animal) ois.readObject();
        System.out.println(an);
        ois.close();
    }

result

eat：饭、write：水

The actual development of the sequence general use third-party management tools, could be turned into text transmission structured, can all languages can be used.

transient

transient: in the process of the automatic sequence of operations (typically are automatically saved), the need to save the attribute declaration.

A simple example:

class Animal implements Serializable{
    private transient String eat;
    private transient String write;

    public Animal() {
    }

    public Animal(String eat, String write) {
        this.eat = eat;
        this.write = write;
    }

    public String getEat() {
        return eat;
    }

    public void setEat(String eat) {
        this.eat = eat;
    }

    @Override
    public String toString() {
        return "eat：" + this.eat + "、write：" + this.write;
    }
}

public class Demo01 {
    private static final File ANIMAL_FILE = new File("D:" + File.separator + "Hello.ses");
    public static void main(String[] args) throws Exception {
        ///test();
        detest();
    }

    public static void test() throws Exception {
        Animal an = new Animal("饭","水");
        ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(ANIMAL_FILE));
        oos.writeObject(an);
        oos.close();
    }

    public static void detest() throws Exception {
        ObjectInputStream ois = new ObjectInputStream(new FileInputStream(ANIMAL_FILE));
        Animal an = (Animal) ois.readObject();
        System.out.println(an);
        ois.close();
    }
}