Getting Started with Spring Boot 3

Spring Boot 3.0 brings exciting new features and improvements to help you build better Java applications. Let's explore what's new and how to get started.

What's New in Spring Boot 3?

Native Support for Jakarta EE 9

Spring Boot 3.0 has moved from javax.* packages to jakarta.* packages, aligning with Jakarta EE 9.

Java 17 Baseline

Spring Boot 3.0 requires Java 17 as the minimum version, bringing modern Java features to your applications.

Native Compilation Support

Better support for GraalVM native compilation, allowing you to create native executables.

Getting Started

First, let's create a new Spring Boot 3 project. You can use Spring Initializr or start with this basic pom.xml:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.0.0</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    </dependencies>
</project>

Creating Your First REST Controller

Here's a simple REST controller using Spring Boot 3:

@RestController
@RequestMapping("/api")
public class HelloController {

    @GetMapping("/hello")
    public String hello() {
        return "Hello from Spring Boot 3!";
    }
}

Stay tuned for more detailed tutorials on each of these topics!