Tag: Spring Boot Basics

Spring

Spring Boot: Building a RESTful Web Application

Introduction: REST stands for Representational State Transfer and is an architectural guideline for API design. We assume that you already have a background in building RESTful APIs. In this tutorial, we’ll design a simple Spring Boot RESTful web application, exposing a few REST endpoints. Project Setup: Let’s start by downloading the project template via Spring […]

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Spring

Spring Boot with H2 Database

Introduction: In this quick tutorial, we’ll bootstrap a simple Spring Boot application backed by an in-memory H2 database. We’ll use the Spring Data JPA to interact with our database. Project Setup: Firstly, let’s generate our project template using Spring Initializr: On clicking the ‘Generate the project’ link, our project files will get downloaded. Now, if […]

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Spring

@SpringBootConfiguration Annotation in Spring Boot

Introduction: @SpringBootConfiguration annotation in Spring Boot is a class-level annotation which indicates that this class provides the application configuration. Generally, the class with the main() method is best-suited for this annotation. We usually use @SpringBootApplication annotation which automatically inherits the @SpringBootConfiguration annotation. Annotation Usage: When we mark a class with @SpringBootConfiguration, it means that the […]

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Spring

Spring Boot CommandLineRunner and ApplicationRunner

Introduction: In this quick tutorial, we’ll explore the two very popular interfaces in Spring Boot: CommandLineRunner and ApplicationRunner. One common use case of these interfaces is to load some static data at application startup. Though, I have seen such usages mostly for test data setup only. Both of them are functional interfaces with a run() […]

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Spring

Introduction to Spring Boot

Introduction: In this tutorial, we’ll take a look at Spring Boot and see how it’s different from the Spring framework. We’ll also discuss various features offered by Spring Boot. What is the Spring Boot? Spring is a powerful framework when it comes to developing enterprise-level applications. It provides us with features like dependency injection along […]

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Spring

Spring Boot YAML Configuration

Introduction: In this quick tutorial, we’ll learn how to use a YAML file to configure properties of a Spring Boot application. What is YAML File? Instead of having an application.properties in Spring, we can use the application.yml as our configuration file. YAML is a superset of JSON and we can use it for configuring data. The […]

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Spring

Spring Boot Exit Codes – Create Custom Exit Code

Introduction: When running a Spring Boot application, we get a system exit code of 0, when everything goes fine.  For any unhandled exceptions, the application returns with an exit code 1. It’s possible for us to return a custom exit code from our Spring Boot application. In this tutorial, we’ll learn to do so. Implementing […]

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