How does Spring Boot 4 support GraalVM native images?

# Requirements for native image in Spring Boot 4:
# 1. GraalVM native-image 25 (or later)
# 2. java.version >= 17
# 3. spring-boot-starter-parent as parent (or spring AOT plugin)

# Build native image with Maven:
./mvnw -Pnative native:compile
# Output: target/order-service (native binary)

# Build native image with Gradle:
./gradlew nativeCompile
# Output: build/native/nativeCompile/order-service

# Build Docker image with native binary (Buildpacks):
./mvnw spring-boot:build-image -Pnative
# Creates a container image using Cloud Native Buildpacks

// Native image hints for reflection (when AOT analysis misses something):
@ImportRuntimeHints(MyRuntimeHints.class)
@SpringBootApplication
public class App { ... }

public class MyRuntimeHints implements RuntimeHintsRegistrar {
    @Override
    public void registerHints(RuntimeHints hints, ClassLoader cl) {
        // Register class for reflection:
        hints.reflection()
            .registerType(MyDynamicClass.class,
                MemberCategory.INVOKE_DECLARED_METHODS);
        // Register resource file:
        hints.resources().registerPattern("templates/*.html");
    }
}

# Native image startup comparison:
# JVM mode:    ~2-4 seconds startup, ~256MB heap
# Native mode: ~50-100ms startup,    ~50MB memory
# Trade-off:   Build time 5-10 minutes; no JIT optimisation at runtime