Build a REST API in Spring Boot Using EntityManager & MySQL
In this video, I explain how to build a professional REST API using Spring Boot, Hibernate (JPA), EntityManager, and MySQL.
This session focuses on architecture and understanding how a real backend system works before writing code.
Topics covered:
• Layered Architecture (Controller → Service → DAO → Database)
• Employee Entity Mapping using JPA Annotations
• Using EntityManager instead of JpaRepository
• DAO Interface and Implementation Design
• @PersistenceContext vs @Autowired
• REST Endpoints (GET, POST, PUT, DELETE)
• Request → Response Flow in a Spring Boot Application
• Transaction management using @Transactional