Spring-based REST API development

Understand the operating principles and structure of Spring Security and learn how to set up authentication and authorization features required for web applications by utilizing the various functions provided by Spring Security.

Learn “Effective Java,” the ultimate Java learning guide, more easily and completely. By taking this course, you can improve not only your Java programming knowledge and skills, but also your learning ability.

The features added to Java 8 are widely used in APIs provided by Java as well as third-party libraries and frameworks such as Spring. If you are a Java developer in this era, you must know them. Make them your own technology easily and quickly through this lecture.

If you want to grow as a developer who is recognized by your colleagues, team, and even the company, and can work with more responsibility and influence? In this lecture, I will share with you my know-how on growth.

Refactoring is one of the basic skills that a software engineer should have. This course is designed to explain and practice various code smells and refactoring techniques in a more practical way using IntelliJ and Java.

Have you ever wondered "how" the many Java libraries and frameworks you use provide this functionality? In this course, learn how to manipulate various codes or objects provided by Java and take your Java skills to the next level.

Learn “Effective Java,” the ultimate Java learning course, more easily and completely. By taking this course, you can improve not only your Java programming knowledge and skills, but also your learning ability.

Learn “Effective Java,” the ultimate Java learning course, more easily and completely. By taking this course, you can improve not only your Java programming knowledge and skills, but also your learning ability.

Knowing design patterns will make it easier to learn not only Spring but also many other technologies and programming languages. It will also help you develop more flexible and reusable object-oriented software.

Developer interview taught directly by a senior software engineer who went through Naver and Amazon and is currently at Microsoft!! This lecture focuses on the "developer interview" rather than the "coding interview". When hiring a developer or, conversely, when changing jobs or seeking employment, the "coding interview" is never the only thing that determines success or failure. Through this lecture, I hope you will learn more about how to hire a developer or prepare for a change or seeking employment.

This lecture is an extension of the "Spring Boot Concepts and Utilization" lecture and covers the Spring Boot updates that have been made over the past two years. Check out the new features and changes from Spring Boot 2.1 to 2.4 and update to the latest version of Spring Boot.

In this course, you will learn how to develop a web application using various Java-based open source technologies including Spring, JPA, and Thymeleaf, which are actually operating services. If you study this course enough, you will be able to create your own web service or create a portfolio that will help you get a job.

If you are a student or developer who is using or studying the Java programming language, you will learn various methods of testing your applications that you must know.

This course is for those who are new to the Spring framework. By looking at the code of the official Spring example project called Spring - PetClinic, you can easily and quickly understand the following core features of Spring.

This course covers Spring Web MVC, a Java Servlet-based MVC framework. For a more efficient learning experience, please take the Spring Framework Core Technologies course.

By looking at the code of the official Spring example project called Spring-PetClinic, you can easily and quickly understand the following core features of Spring.

This course uses Spring Boot and teaches you the core Spring technologies. Therefore, this is a useful Spring course for developers or students who are using Spring Boot-based projects.

Learn about Spring Data JPA, which provides several features to make using JPA (Java Persistence API) easier.

Learn how to easily understand the principles and various functions of Spring Boot through coding and use them more actively.

You can learn the skills and know-how needed to improve work efficiency by utilizing Open API and Python.

Starting with java.io, you can learn how to develop high-performance input/output systems based on NIO and NIO.2. Most importantly, the moment you master file I/O, we'll enable you to master high-performance server development as a bonus!

This lecture is an edited version of a YouTube live video that I made with Toby to celebrate the release of his <Toby's Spring> lecture.

Through this lecture, you can learn about the characteristics and background of the Kotlin language, grammar and operation principles, usage examples, and things to be careful of when using Java and Kotlin together.

It covers just two things properly: object-oriented programming and the JVM! Plus, it throws in linked-list-based linear data structures.

Spring AI + JPA + MySQL Premium Reservation Agent Backend Development with 'Autonomous Behavior' Beyond Chatbots to Agents: The Definitive Guide to Tool Calling and Prompt Engineering

Full 40-hour Spring-based Full-stack Web Development Completely Free Course

This course covers the overall content of web servers required for game development using the latest ASP.NET Core (Blazor, WebAPI).

Springboot + React RestAPI Bulletin Board Creation: Learn Faster Than Anyone Develop a CRUD server with Springboot and create your own board with React!

Build a Springboot + iOS RestAPI Bulletin Board: Learn Faster than Anyone Develop a CRUD server with Springboot and create your own bulletin board with iOS!

JAVA is a programming language, just like the C language. JAVA can be used for web development and application development, and here we will learn JAVA before doing web development.

Based on real-world web service development experience, this full-stack series targets beginners, aiming to develop web and app services capable of actual commercialization. As the initial step (part1-1), this lecture details intermediate Python for full-scale development, backend implementation with flask, and essential web technologies (e.g., HTTP, RestAPI, MVC patterns).

Handling media (video, audio) on the web is now easier than ever! Learn the MediaStream API and WebRTC by following along step by step.

IntelliJ IDEA Conf 2025 is an annual online conference hosted by JetBrains that provides valuable sessions for Java and Kotlin developers. It covers various topics including AI adoption, Spring Boot, Gradle, Kafka, and database management, while also sharing insights on cloud integration, secure coding, developer performance improvement, and advanced development techniques. This conference is accessible to both professional and beginner developers, offering opportunities to learn about the latest technologies along with productivity tips for writing high-quality code more efficiently.

Learn Springboot + ReactNative RestAPI Board Creation Faster Than Anyone Develop a CRUD server with Springboot and create your own board with ReactNative!

Experience the power of Type Safe SQL with jOOQ!

In this course, rather than covering the theory directly, you will learn how to use Redis effectively in your code through hands-on practice.

Learn how to save, modify, delete, and query data in a database. Anyone, regardless of major, can easily follow along in just 30 minutes.