Spring Boot Application

Overview
When to Use
Quick Start
Reference Guides
Best Practices

Overview

Develop production-ready Spring Boot applications with proper annotation-based configuration, dependency injection, REST controllers, JPA data persistence, service layers, and security implementation following Spring conventions.

When to Use

Building Spring Boot REST APIs
Implementing service-oriented architectures
Configuring data persistence with JPA
Managing dependency injection
Implementing Spring Security
Building microservices with Spring Boot

Quick Start

Minimal working example:

<!-- pom.xml -->
<project>
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example</groupId>
    <artifactId>api-service</artifactId>
    <version>1.0.0</version>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.1.0</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide	Contents
Spring Boot Project Setup	Spring Boot Project Setup
Entity Models with JPA Annotations	Entity Models with JPA Annotations
Repository Layer with Spring Data JPA	Repository Layer with Spring Data JPA
Service Layer with Business Logic	Service Layer with Business Logic
REST Controllers with Request/Response Handling	REST Controllers with Request/Response Handling
Spring Security Configuration	Spring Security Configuration
Application Configuration	Application Configuration

Best Practices

✅ DO

Use dependency injection for loose coupling
Implement service layer for business logic
Use repositories for data access
Leverage Spring Security for authentication
Use @Transactional for transaction management
Validate input in controllers
Return appropriate HTTP status codes
Use DTOs for request/response mapping
Implement proper exception handling
Use Spring's @Async for async operations

❌ DON'T

Put business logic in controllers
Access database directly in controllers
Store secrets in configuration files
Use eager loading for large relationships
Ignore transaction boundaries
Return database entities in API responses
Implement authentication in controllers
Use raw SQL without parameterized queries
Forget to validate user input

spring-boot-application