In Java, what is the difference between serialization and deserialization?

Serialization converts objects into byte sequences, and deserialization restores byte sequences into objects. Serialization is used to persist or transfer objects, while deserialization is used to reconstruct objects. In the actual case, the user object is serialized and written into a file, and then deserialized and read out, demonstrating the practical application of serialization and deserialization in Java.

Serialization and Deserialization in Java: Concepts and Practice

What is serialization?

Serialization is the process of converting an object's state into a sequence of bytes that can be stored or transmitted. It is typically used to persist objects or send objects over the network.

What is deserialization?

Deserialization is the reverse process of restoring a sequence of bytes to an object. It allows objects to be recreated from storage or network transfer.

Difference

• Direction: Serialization converts the object into a sequence of bytes, while deserialization restores the sequence of bytes to object.
• Usage: Serialization is used for persistence or transmission, while deserialization is used to reconstruct the object.
• Output/Input: Serialization writes an object to a stream (such as a file or network socket), while deserialization reads a sequence of bytes from the stream.

Practical case: Serialization and deserialization of user objects

// 序列化对象
User user = new User("Alice", 25);
ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("user.ser"));
out.writeObject(user);
out.close();

// 反序列化对象
ObjectInputStream in = new ObjectInputStream(new FileInputStream("user.ser"));
User deserializedUser = (User) in.readObject();
in.close();

System.out.println(deserializedUser.getName()); // 输出：Alice

Conclusion

Serialization and Deserialization is an important technology in Java for persisting and transferring objects. They provide a flexible and efficient way to process objectized data.

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