I finished JPA Utilization 1 - ORM Basics - JPA Utilization 2! I started a toy project, and my teammate said that the client would be implemented in C#, so I was thinking of returning it in JSON format using API, and I heard about it right then! It was really, really helpful.. ! I have two lectures left, springDataJPA and queruDSL, but I'm thinking about it because SpringMVC Utilization 2 is coming out.. ㅎㅎ Thank you.