If you use Spring Batch, this is a must-take lecture. I originally configured a batch application with Spring Batch, but since there is too little information when you Google it, it is very difficult to understand and use. Also, there were times when I wondered if I used it correctly, but as I took this lecture and learned the basics of Spring Batch step by step, I realized that it is not just a batch framework. Spring Batch is a powerful and highly scalable batch framework that provides various functions, so there is a lot to learn. You can never say that you used it according to the design intention of Spring Batch by just Googling and using it. If you want to create a stable batch application, this lecture is a must-take.