This is a really great lecture!! This is a lecture that I recommend 5.5 trillion times to those who are new to Spring and don't understand it well. I also bought Toby's Spring book while studying Spring as a job seeker and studied it in various ways, but even after doing so, Spring was not outlined well, but after watching this lecture, it was a lecture that really drew the overall picture of Spring as the instructor said. I really recommend it!!!!