Spring Data JPA Java Record DTO Projection
1. Introduction With Java 14 (and finalized in Java 16), Records provide an immutable and compact way to represent data. Using records in Spring Data JPA allows better performance and cleaner code when fetching only required fields instead of full entity objects. Benefits of Using Java Records in DTO Projections: Immutable by Default : Ensures data integrity. Concise Syntax : Reduces boilerplate code. Optimized Performance : Fetches only necessary fields from the database. 2. Setting Up the Spring Boot Project Dependencies Ensure you have the necessary dependencies in your pom.xml for a Spring Boot application with Spring Data JPA. < dependencies > <!-- Spring Boot Starter JPA --> < dependency > < groupId > org.springframework.boot </ groupId > < artifactId > spring-boot-starter-data-jpa </ artifactId > </ dependency > <!-- H2 Database (for testing) --> < dependency > <...