Spring Boot boilerplate generator — complete production Java API from your requirements

What the generated Spring Boot app contains

Application structure (Layered architecture)

src/main/java/com/{package}/
  config/
    SecurityConfig.java          # Spring Security filter chain + JWT
    DatabaseConfig.java          # DataSource, transaction manager
    CorsConfig.java
  controller/
    AuthController.java          # POST /auth/login, /auth/refresh
    {Entity}Controller.java      # @RestController per entity
  service/
    AuthService.java
    EmailService.java            # Spring Mail (SendGrid/SES)
    {Entity}Service.java         # business logic, transaction boundaries
  repository/
    {Entity}Repository.java      # extends JpaRepository<{Entity}, UUID>
  model/
    {Entity}.java                # @Entity + @Table with indexes
    User.java
    Workspace.java
  dto/
    {Entity}Request.java         # @Valid annotated request DTOs
    {Entity}Response.java        # response projection (no entity leaks)
    ErrorResponse.java
  exception/
    GlobalExceptionHandler.java  # @ControllerAdvice, consistent error format
    {Entity}NotFoundException.java
  security/
    JwtTokenProvider.java
    JwtAuthenticationFilter.java
src/main/resources/
  application.properties         # ${env:DATABASE_URL} format, no hardcoding
  db/migration/
    V1__create_users.sql
    V2__create_workspaces.sql
    V{n}__create_{entity}.sql    # one Flyway migration per entity
src/test/java/com/{package}/
  controller/
    {Entity}ControllerTest.java  # @SpringBootTest + MockMvc
  service/
    {Entity}ServiceTest.java     # @ExtendWith(MockitoExtension.class)
pom.xml                          # (or build.gradle)
Dockerfile
docker-compose.yml
Makefile
openapi.yaml

Database layer

• Spring Data JPA with Hibernate — no raw SQL for queries
• Flyway migrations — one .sql file per entity, version-controlled
• @Index annotations on all foreign key columns
• Multi-tenant scoping: @Filter or explicit workspace_id parameter on every protected query
• Optimistic locking (@Version) on aggregate root entities
• PostgreSQL — never H2 in production config

Auth and security

• JWT issued as httpOnly, Secure, SameSite=Lax cookies
• JwtAuthenticationFilter validates token on every request, sets SecurityContext
• BCryptPasswordEncoder for password hashing
• @PreAuthorize method-level security for fine-grained permissions
• All secrets via ${env:SECRET_KEY} — never hardcoded
• Rate limiting on auth endpoints via Bucket4j

API design

• REST controllers with @RequestMapping("/api/v1/{entities}")
• Routes match the generated OpenAPI 3.1 spec (documented via SpringDoc OpenAPI)
• {Entity}Response DTO on every response — never return @Entity directly
• Consistent error format: {"error": "snake_case_code", "message": "Human readable description."}
• 201 for creation, 422 for validation errors (via @Valid), 403 for permission, 404 for not found
• Pagination via Spring Data's Pageable + Page<T> response wrapper

Tests

• JUnit 5 + Mockito + MockMvc test suite
• @SpringBootTest with @AutoConfigureMockMvc for integration tests
• @DataJpaTest with Testcontainers PostgreSQL for repository tests
• Auth tests: token issuance, expiry, refresh, unauthorized access enforcement
• Controller tests: HTTP status codes, validation errors, authorization
• Service tests: business logic, exception scenarios

Infrastructure

• Multi-stage Dockerfile (eclipse-temurin:21-jdk-alpine build → JRE runtime — ~180MB final image)
• docker-compose.yml: Spring Boot app + PostgreSQL + Redis (for session store / rate limiting)
• Makefile: make dev, make test, make migrate
• GitHub Actions: checkstyle → maven verify (or gradle check) → docker build → deploy

Spring Boot vs Micronaut vs Quarkus

Choose Spring Boot when:

• Your enterprise team already knows the Spring ecosystem
• You need the broadest library compatibility (Spring integrates with everything)
• Long-term support and documented migration paths matter
• Hiring Java developers from a large talent pool

Choose Micronaut/Quarkus when:

• Cold start time is critical (serverless, Kubernetes horizontal scaling)
• You want native compilation via GraalVM

Spring Boot is the correct default for enterprise Java. It has the largest community, the most comprehensive documentation, and the widest integration ecosystem. Archiet generates Spring Boot.

vs Spring Initializr

Spring Initializr (start.spring.io) generates a skeleton with selected dependencies. It gives you zero domain-specific code.

Archiet generates the full application: your JPA entities, your Flyway migrations, your repositories, your services, your controllers, your tests — everything that constitutes your actual product.

CTA

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Describe your product, pick Java Spring Boot, download a production-ready codebase in 90 seconds.

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