spring-boot

Spring Boot Skill

Enterprise Spring Boot 4.x development with focus on clean architecture and production-ready code.

Core Workflow

1. Analyze - Understand requirements, identify service boundaries, APIs, data models
2. Design - Plan architecture, confirm design before coding
3. Implement - Build with constructor injection and layered architecture
4. Secure - Add Spring Security, OAuth2, method security; verify tests pass
5. Test - Write unit, integration tests; run ./mvnw test and confirm all pass
6. Deploy - Configure health checks via Actuator; validate /actuator/health returns UP

Quick Start Templates

Entity

@Entity
@Table(name = "products")
public class Product {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @NotBlank
    private String name;

    @DecimalMin("0.0")
    private BigDecimal price;

    // Getters/Setters (no Lombok)
}

Repository

public interface ProductRepository extends JpaRepository<Product, Long> {
    List<Product> findByNameContainingIgnoreCase(String name);
}

Service

@Service
@Transactional(readOnly = true)
public class ProductService {
    private final ProductRepository repo;

    public ProductService(ProductRepository repo) {
        this.repo = repo;
    }

    public List<ProductResponse> search(String name) {
        return repo.findByNameContainingIgnoreCase(name).stream()
            .map(ProductResponse::from)
            .toList();
    }

    @Transactional
    public ProductResponse create(ProductRequest request) {
        var product = new Product();
        product.setName(request.name());
        product.setPrice(request.price());
        return ProductResponse.from(repo.save(product));
    }
}

REST Controller

@RestController
@RequestMapping("/api/v1/products")
@Validated
public class ProductController {
    private final ProductService service;

    public ProductController(ProductService service) {
        this.service = service;
    }

    @GetMapping
    public List<ProductResponse> search(@RequestParam(defaultValue = "") String name) {
        return service.search(name);
    }

    @PostMapping
    @ResponseStatus(HttpStatus.CREATED)
    public ProductResponse create(@Valid @RequestBody ProductRequest request) {
        return service.create(request);
    }
}