java-spring-boot

Provides best practices for building Spring Boot applications with Java.

Updated Aug 22, 2026
One-click install
npx skills add https://github.com/balajirags/aifsd-kit --skill java-spring-boot-balajirags
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: java-spring-boot
Source: https://github.com/balajirags/aifsd-kit/tree/main/docs/skills/java-spring-boot
Command: npx skills add https://github.com/balajirags/aifsd-kit --skill java-spring-boot-balajirags

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve? Developers often write Spring Boot code that ignores established conventions, leading to hard-to-test components, inconsistent configuration, and security gaps. This Skill guides an AI agent to follow proven Spring Boot best practices across project structure, dependency injection, configuration, web, service, data, logging, testing, and security layers. ## Core Features & Use Cases - Architecture Guidance: Enforces constructor injection, feature-based package structure, DTO usage, and proper component stereotypes. - Configuration & Security Practices: Covers externalized configuration with @ConfigurationProperties, profiles, secrets management, Spring Security, and BCrypt password encoding. - Testing Strategy: Recommends JUnit 5, Mockito, test slices like @WebMvcTest and @DataJpaTest, and Testcontainers for integration tests. - Use Case: When asking an AI agent to scaffold a new REST API with Spring Boot, this Skill ensures the generated code uses constructor injection, validates request DTOs with Bean Validation, handles errors via @ControllerAdvice, and includes proper test coverage. ## Quick Start Ask the agent to create a Spring Boot REST controller with a service and repository following the Spring Boot best practices skill.

Frequently Asked Questions about java-spring-boot

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I structure a Spring Boot project following best practices?

Organize code by feature or domain (e.g., com.example.app.order) rather than by layer. Use Gradle with Spring Boot starters for dependencies, and apply constructor injection with private final fields for all required dependencies.

How to handle configuration in Spring Boot applications?

Use application.yml for externalized configuration and bind values to strongly-typed objects with @ConfigurationProperties. Manage environment differences with Spring Profiles and never hardcode secrets; use environment variables or tools like HashiCorp Vault.

Should I expose JPA entities directly in Spring Boot REST APIs?

No, use DTOs (Data Transfer Objects) in the API layer instead of exposing JPA entities. Validate incoming DTOs with Bean Validation annotations like @Valid and @NotNull, and handle errors globally with @ControllerAdvice.

What testing approach does Spring Boot recommend?

Write unit tests with JUnit 5 and Mockito, use @SpringBootTest for full-context integration tests, and apply test slices like @WebMvcTest or @DataJpaTest for isolated layer testing. Testcontainers is recommended for tests against real databases.

How do I secure passwords in a Spring Boot application?

Use Spring Security for authentication and authorization, and always encode passwords with a strong hashing algorithm like BCrypt. Prevent SQL injection through Spring Data JPA or parameterized queries and encode output to prevent XSS.