---
name: Spring Boot
slug: spring-boot-2
category: AI Engineering
description: Spring Boot builds Spring Boot 4.x applications with recommended package structure, REST APIs, persistence, Modulith, Thymeleaf, and testing practices. Use it when creating or reviewing Spring Boot apps and their Maven, Docker Compose, ArchUnit, and Taskfile setup.
github: "https://github.com/sivaprasadreddy/sivalabs-agent-skills/tree/main/skills/spring-boot"
language: Python
stars: 178
forks: 41
install: "npx degit https://github.com/sivaprasadreddy/sivalabs-agent-skills/tree/main/skills/spring-boot ~/.claude/skills/spring-boot"
installs_to: ~/.claude/skills/spring-boot
source_path: skills/spring-boot/SKILL.md
collection_size: 7
category_size: 3475
collection_url: "https://dirskills.com/collections/sivaprasadreddy/sivalabs-agent-skills"
added: 2026-09-07T05:20:47.679Z
last_synced: 2026-09-07T05:20:47.679Z
canonical_url: "https://dirskills.com/skills/spring-boot-2"
---

# Spring Boot

Spring Boot builds Spring Boot 4.x applications with recommended package structure, REST APIs, persistence, Modulith, Thymeleaf, and testing practices. Use it when creating or reviewing Spring Boot apps and their Maven, Docker Compose, ArchUnit, and Taskfile setup.

**Install:**

```bash
npx degit https://github.com/sivaprasadreddy/sivalabs-agent-skills/tree/main/skills/spring-boot ~/.claude/skills/spring-boot
```

## README

# Spring Boot Skill

Apply the practices below when developing Spring Boot applications. Read the linked reference only when working on that area.

## Maven pom.xml Configuration

Read [references/spring-boot-maven-config.md](references/spring-boot-maven-config.md) for Maven `pom.xml` configuration with supporting plugins and configurations to improve code quality, and testing.

## Package structure

Read [references/code-organization.md](references/code-organization.md) for domain-driven, module-based package layout and naming conventions.

## Spring Data JPA

Implement the repository and entity layer using [references/spring-data-jpa.md](references/spring-data-jpa.md).

## Service layer

Implement business logic in the service layer using [references/spring-service-layer.md](references/spring-service-layer.md).

## Spring MVC REST APIs

Implement REST APIs with Spring MVC using [references/spring-webmvc-rest-api.md](references/spring-webmvc-rest-api.md).

## Spring Modulith

Build a modular monolith with Spring Modulith using [references/spring-modulith.md](references/spring-modulith.md).

## Thymeleaf

If Thymeleaf is used for view templates, refer [references/thymeleaf.md](references/thymeleaf.md)

## Testing

Write tests at complementary levels — unit, sliced Spring tests, and at least one end-to-end/smoke test; the levels are not either/or. Most framework-touching tests belong at the fast **sliced** level (`@SpringBootTest(classes = …)` or a slice annotation); keep full-context `@SpringBootTest` for a smoke test plus a request-level end-to-end. For why the levels are complementary and how to keep a large suite fast (context caching, one container for the suite), read [references/testing-strategy.md](references/testing-strategy.md).

| What you're testing | Level | Reference |
|---|---|---|
| Business/domain logic, no framework | Unit (no Spring context) | [testing-unit-mocking.md](references/testing-unit-mocking.md) |
| JPA / JDBC / JdbcClient / Spring Data JDBC / jOOQ queries | Persistence slice + Testcontainers | [testing-slices-persistence.md](references/testing-slices-persistence.md) |
| Controller, JSON serialization, or a REST client | Web slice (`@WebMvcTest`/`@JsonTest`/`@RestClientTest`) | [testing-slices-web.md](references/testing-slices-web.md) |
| A few components together, external HTTP (WireMock), or a startup/request-level smoke test | Sliced `@SpringBootTest(classes = …)` or smoke test | [testing-integration.md](references/testing-integration.md) |
| Full REST API over a real port, full `BaseIT` suite (`RestTestClient`) | End-to-end | [spring-boot-rest-api-testing.md](references/spring-boot-rest-api-testing.md) |
| A view-rendering controller (`MockMvcTester`) | Web slice | [spring-boot-webapp-testing-with-mockmvctester.md](references/spring-boot-webapp-testing-with-mockmvctester.md) |
| Wiring a container (`@ServiceConnection` / dynamic properties) | — | [testcontainers-wiring.md](references/testcontainers-wiring.md) |

All persistence and integration tests use **Testcontainers with a real database** (never in-memory H2); see [references/testcontainers-wiring.md](references/testcontainers-wiring.md) for `@ServiceConnection` vs dynamic-property wiring.

### Write ArchUnit Tests
To write tests for testing the architecture using ArchUnit, refer [references/archunit.md](references/archunit.md)

### Spring Boot Docker Compose Support
To use Docker Compose support for local development, refer [references/spring-boot-docker-compose.md](references/spring-boot-docker-compose.md).

## Taskfile

Use [references/taskfile.md](references/taskfile.md) for easier commands execution.