Practical! Spring Data JPA

Learn the essential SQL and database fundamentals needed for practical work. Not only developers, but also planners and data analysts can learn SQL in depth.

Learn database design systematically through three stages: conceptual, logical, and physical, and strengthen your capabilities with a practical shopping mall project. Acquire real-world expertise through modern design techniques and the latest trends.

Spring beginners can grasp core principles and solidify basics via examples.

You can understand and master all the web technologies required to develop web applications from the basics. You can understand the core principles and structure of Spring MVC and grow into a more in-depth backend developer.

Learn the core HTTP features essential for practical use and how to design proper HTTP APIs.

Learn Java generics and collection frameworks in depth with a focus on practical applications. Also learn the basics of data structures.

Learn practical core Java object-oriented concepts easily via example code.

You can understand and master all the web technologies required for web application development from the basics. In Part 2 of MVC, you can learn all the utilization technologies required for practical web development on top of the core principles and structure of Part 1 of MVC.

This book provides an in-depth study of various intermediate-level Java features necessary for practical work, using example code.

This course provides an in-depth study of multithreading and concurrency, from basic principles to practical applications.

For those who are new to JPA or who use JPA in practice but lack basic theory, By learning the basic theory of JPA solidly, even beginners can confidently use JPA in practice.

Learn I/O, networking, reflection, and annotations in depth, from the basics to the practical level. Build a web application server (WAS) directly in Java.

Learn the essential modern Java technologies of Lambda, Stream, and functional programming with Java, from the basics to the practical level, in depth.

You can understand and perfect the basics of DB data access technology required for backend development. You can understand the principles and structure of Spring DB access technology and grow into a more in-depth backend developer.

This course will cover everything you need to know about Spring Boot for practical use.

You will learn the core principles and advanced technologies of Spring in depth and be able to use Spring confidently.

Develop APIs using Spring Boot and JPA. And learn how to optimize JPA's extreme performance.

With a practical example, we will design and develop a web application using Spring Boot and JPA. Through this process, you will understand how to use Spring Boot and JPA in practice.

You can utilize and complete the DB data access technology required for backend development. You can understand the principles and structure of Spring DB access technology and grow into a more in-depth backend developer.

Solve everything from the basics of querydsl to practical use all at once!

Develop APIs using Spring Boot and JPA. And learn how to optimize JPA's extreme performance.

With a practical example, we will design and develop a web application using Spring Boot and JPA. Through this process, you will understand how to use Spring Boot and JPA in practice.

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

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!

This course is a practical-focused learning program for JWT-based token authentication and security enhancement techniques that are essential in modern web service environments. Using Spring Boot 3, Spring Security 6, and React, you'll implement secure login systems and cover comprehensive security practices including XSS·CSRF countermeasures, HTTPS implementation, token reissuance and revocation strategies, and secure secret key management. Additionally, you'll practice real service-level environment configuration through AWS build·deployment and performance optimization using Redis, and the complete project source code provided in the course can be directly applied to real-world work.

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

Learn SAGA transaction management techniques for maintaining data consistency in distributed environments through hands-on practice. Configure 3 microservices using Spring Boot and Docker, and implement both Orchestration and Choreography patterns with Kafka and MySQL. Through this course, you can master core concepts that are immediately applicable in practice, including distributed transaction operation principles, compensating transaction design, and failure recovery handling.

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

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!

Experience the power of Type Safe SQL with jOOQ!

I've created a beginner-friendly and practical 'Introduction to Elasticsearch' course!

Learn Java generics and collection frameworks in depth with a focus on practical applications. Also learn the basics of data structures.

Learn I/O, networking, reflection, and annotations in depth, from the basics to the practical level. Build a web application server (WAS) directly in Java.

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

AI is no longer a choice but a matter of survival. Reduce development time from 3 days to 30 minutes, delegate repetitive tasks to AI, and focus on solving more important problems. With AI-native development methods that you can apply immediately in real work rather than just theory, we'll show you the definitive way to be recognized as "the developer who's good with AI" at your company.

💡 Even non-developers can go from startup MVP to monetized service in just 10 hours with AI! 💰 Development that used to cost tens of millions in outsourcing fees now completely solved for 120,000 won 🎯 Complete 5 real business projects including business card recognition, sentiment analysis, and location analysis 🔥 If you're a planner, marketer, or aspiring entrepreneur, implement ideas without developers ⚡ Start now and acquire lifelong development independence skills!

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

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

This course proceeds in stages, similar to the actual work, by learning and applying the necessary knowledge while configuring the infrastructure.

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.