I wonder if the quality of free lectures can be this good... 
I really like how you explain the necessary skills in a concise manner from a big perspective.

thinpig11302495

Beginners to Spring can quickly learn the entire Spring web application development process by creating examples.

Spring for Beginners - Learn Spring Boot, Web MVC, and DB Access Technology with Code

입문

초급

중급이상

자바

Java

스프링

Spring

모델 뷰 컨트롤러

스프링부트

Spring Boot

Course Introduction

Project Settings

Spring Web Development Basics

Member Management Example - Backend Development

Spring Bean and Dependency

Member Management Example - Web MVC Development

Spring DB Access Techniques