java-springboot

Comprehensive best practices guide for building production-ready Spring Boot applications. Your goal is to help me write high-quality Spring Boot applications by following established best practices. - Covers project structure, dependency injection patterns, and configuration management including externalized config, type-safe properties, and environment profiles - Details web layer design with RESTful APIs, DTOs, validation, and global exception handling - Addresses service layer statelessness, transaction management, and data access patterns using Spring Data JPA with custom queries and projections - Includes logging standards with SLF4J, testing strategies across unit and integration tests with test slices and Testcontainers, and security fundamentals with Spring Security and password encoding - Build Tool: Use Maven ( pom.xml ) or Gradle ( build.gradle ) for dependency management. - Starters: Use Spring Boot starters (e.g., spring-boot-starter-web , spring-boot-starter-data-jpa ) to simplify dependency management. - Package Structure: Organize code by feature/domain (e.g., com.example.app.order , com.example.app.user ) rather than by layer (e.g., com.example.app.controller , com.example.app.service ). - Constructor Injection: Always use constructor-based injection for required dependencies. This makes components easier to test and dependencies explicit. - Immutability:...