One of the most powerful additions is AOT (Ahead-Of-Time) compilation. To build a native image:
<build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> A. Jakarta Namespace (Replaces javax) // Spring Boot 2 import javax.persistence.Entity; import javax.persistence.Id; // Spring Boot 3 import jakarta.persistence.Entity; import jakarta.persistence.Id; B. HTTP Interfaces – Declarative REST Clients Spring Boot 3 allows you to define REST clients as interfaces: spring boot 3 project
1. Why Spring Boot 3 Matters Spring Boot 3.0, released in November 2022, represents a fundamental shift in the Java ecosystem. It is not merely an incremental update but a modern foundation for cloud-native, container-first applications. Built on Spring Framework 6, it requires Java 17 as a baseline and fully embraces Jakarta EE 9+ (replacing the old javax.* namespace). One of the most powerful additions is AOT