How to do java serialization and deserialization?
Java serialization and deserialization is a persistence mechanism for storing objects as a sequence of bytes. Serialization uses the java.io.Serializable interface and ObjectOutputStream to write objects to a file or network. Deserialization uses an ObjectInputStream to read a sequence of bytes from a file or network and reconstruct the original object. Serialization and deserialization are used in Java to persist objects, such as persisting user objects for later reloading.
An in-depth guide to Java serialization and deserialization
Introduction
Serialization refers to storing an object in a file or network as bytes so that it can be deserialized later and reconstruct the original object. Deserialization is the opposite, it converts data in bytes form into raw objects.
Serialization
In Java, objects can be serialized using the java.io.Serializable
interface. To serialize an object into a file, you can use ObjectOutputStream
:
// 创建一个对象要序列化的 FileOutputStream FileOutputStream fileOut = new FileOutputStream("object.ser"); // 使用 ObjectOutputStream 将对象写入文件中 ObjectOutputStream out = new ObjectOutputStream(fileOut); out.writeObject(myObject); // 关闭 ObjectOutputStream out.close();
Deserialization
To deserialize an object from a file, You can use ObjectInputStream
:
// 创建一个 FileInputStream 以读取序列化的文件 FileInputStream fileIn = new FileInputStream("object.ser"); // 使用 ObjectInputStream 从文件中读取对象 ObjectInputStream in = new ObjectInputStream(fileIn); MyObject myDeserializedObject = (MyObject) in.readObject(); // 关闭 ObjectInputStream in.close();
Practical case: Persistent user object
Assume we have a User
object, we It needs to be stored in a file for persistence. We can do this:
// 创建一个 User 对象 User user = new User("John", "Doe"); // 将 User 对象序列化到文件中 FileOutputStream fileOut = new FileOutputStream("user.ser"); ObjectOutputStream out = new ObjectOutputStream(fileOut); out.writeObject(user); out.close(); // 从文件中反序列化 User 对象 FileInputStream fileIn = new FileInputStream("user.ser"); ObjectInputStream in = new ObjectInputStream(fileIn); User deserializedUser = (User) in.readObject(); in.close(); // 确认反序列化的 User 对象 System.out.println(deserializedUser.getName() + " " + deserializedUser.getLastName()); // 打印:John Doe
Conclusion
Java serialization is a powerful mechanism for object persistence. Through the java.io.Serializable
interface and the ObjectOutputStream
and ObjectInputStream
classes we can easily serialize and deserialize objects.
The above is the detailed content of How to do java serialization and deserialization?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

Guide to Square Root in Java. Here we discuss how Square Root works in Java with example and its code implementation respectively.

Guide to Perfect Number in Java. Here we discuss the Definition, How to check Perfect number in Java?, examples with code implementation.

Guide to Random Number Generator in Java. Here we discuss Functions in Java with examples and two different Generators with ther examples.

Guide to Weka in Java. Here we discuss the Introduction, how to use weka java, the type of platform, and advantages with examples.

Guide to the Armstrong Number in Java. Here we discuss an introduction to Armstrong's number in java along with some of the code.

Guide to Smith Number in Java. Here we discuss the Definition, How to check smith number in Java? example with code implementation.

In this article, we have kept the most asked Java Spring Interview Questions with their detailed answers. So that you can crack the interview.

Java 8 introduces the Stream API, providing a powerful and expressive way to process data collections. However, a common question when using Stream is: How to break or return from a forEach operation? Traditional loops allow for early interruption or return, but Stream's forEach method does not directly support this method. This article will explain the reasons and explore alternative methods for implementing premature termination in Stream processing systems. Further reading: Java Stream API improvements Understand Stream forEach The forEach method is a terminal operation that performs one operation on each element in the Stream. Its design intention is
