Getting Started Articles
Step-by-step introductory articles for those new to Spring Boot, from environment setup to core concepts.
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What is spring-boot-starter-web? Its dependencies, how to add it with Maven/Gradle, and the rename to spring-boot-starter-webmvc
spring-boot-starter-web is the starter for building web applications and REST APIs with Spring MVC and embedded Tomcat. This guide expands its actual contents with mvn dependency:tree (spring-webmvc, Tomcat, Jackson; Bean Validation is not included), shows the minimal pom.xml / build.gradle setup, how to swap Tomcat for Jetty, how it differs from webflux, and covers the rename to spring-boot-starter-webmvc in Spring Boot 4 along with how to handle early migration issues.
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What Is @SpringBootApplication in Spring Boot? Understanding It by Breaking It Down into 3 Annotations
A beginner-friendly explanation of what the @SpringBootApplication annotation on a Spring Boot main class is. We walk through its three building blocks (@SpringBootConfiguration, @EnableAutoConfiguration, and @ComponentScan) and confirm with working code when to use scanBasePackages, exclude, and the --debug report.
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Implementing REST API CRUD in Spring Boot - The Basic Controller, Service, and Repository Structure
A step-by-step guide to implementing REST API CRUD (Create, Read, Update, Delete) in Spring Boot using the three-layer Controller, Service, and Repository architecture. Get the four GET/POST/PUT/DELETE endpoints running with copy-paste code, and verify them end-to-end with curl.
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What is a Spring Boot Starter?
A beginner-friendly explanation of the role and mechanism of Spring Boot Starters. Learn how to choose key Starters like spring-boot-starter-web, why dependency management becomes easier, and common pitfalls to watch out for.
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What is Spring AOP? Explaining the Mechanism and Usage with Sample Code
A clear explanation of how Spring AOP (Aspect-Oriented Programming) works. Learn how to separate common processing such as logging and permission checks from business logic, with Spring Boot setup steps and sample code.
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What is DI (Dependency Injection) in Spring Boot? Explaining the Mechanism, Syntax, and Benefits [For Beginners]
A beginner-friendly explanation of DI (Dependency Injection) in Spring Boot. We'll cover why using new is problematic, how to write constructor injection, and the concrete benefits—easier testing, swappable implementations, and avoiding unnecessary instance creation—all organized with sample code.
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Why Is Spring Boot So Widely Used in Enterprise Application Development?
Explains why Spring Boot is chosen for enterprise systems from the perspectives of development speed, maintainability, and operability. Covers which projects it suits and which it doesn't, plus pre-adoption checkpoints, all from a practical standpoint.