DEV Community: Tejas Agravat

Top 10 Spring Boot Dependency Injection Patterns for 2026

Tejas Agravat — Sun, 11 Jan 2026 16:36:16 +0000

Dependency Injection (DI) is the backbone of Spring Boot. It helps you write clean, maintainable, and testable applications by removing tight coupling between classes.

In this post, I’m sharing 10 essential DI patterns in Spring Boot that every backend developer should understand going into 2026.

🔑 Essential DI Patterns

Constructor Injection – Recommended approach; clear and testable
Field Injection – Simple but discouraged in production
Setter Injection – Useful for optional dependencies
Interface-Based Injection – Promotes loose coupling
@Qualifier – Resolves multiple bean conflicts
@primary – Sets a default bean implementation
Prototype Scope – Creates a new instance per request
@lazy Injection – Improves startup performance
@Configuration + @bean – Explicit bean definitions
@Profile-Based Injection – Environment-specific beans

Why These Patterns Matter

Using the right DI patterns helps you:

Improve code readability
Make applications easier to test
Avoid tight coupling
Build scalable, production-ready systems

📘 Read the Full Article

For detailed explanations, diagrams, and examples, check out the full post here:

👉 Top 10 Spring Boot Dependency Injection Patterns for 2026

https://tejas-agravat.hashnode.dev/top-10-spring-boot-dependency-injection-patterns-for-2026

Let’s Connect

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If you’re learning Spring Boot or improving backend architecture:

Share your experience
Ask questions
Learn together 🚀

👋 If you are new to Spring Boot, this article explains the basics in a clear and practical way. https://dev.to/tejas_agravat_1a781f196b0/getting-started-with-spring-boot-a-beginners-guide-257j

Tejas Agravat — Sun, 28 Dec 2025 12:24:07 +0000

Getting Started with Spring Boot: A Beginner’s Guide

Tejas Agravat ・ Dec 27

#java #backend #springboot #fullstack

Getting Started with Spring Boot: A Beginner’s Guide

Tejas Agravat — Sat, 27 Dec 2025 18:46:32 +0000

Introduction

Spring Boot is a powerful Java framework that makes it easier to build modern backend applications. In this guide, you’ll learn the basics of Spring Boot, how to create a project, understand its structure, manage dependencies, and build a simple REST API.

Canonical Link

https://tejas-agravat.hashnode.dev/getting-started-with-spring-boot-a-beginners-guide

🧠 Prerequisites

Before we begin, you should have a basic understanding of:

Core Java concepts
Object-Oriented Programming (OOP)
Classes, methods, and interfaces
Basic database concepts (tables, primary keys, foreign keys)
Writing simple SQL queries

These fundamentals will help you follow along more easily.

🎯 What You’ll Learn

In this article, you will cover:

What Spring Boot is
Why Spring Boot was introduced
Creating a Spring Boot project
Understanding project structure
Managing dependencies with Maven
Building and running a Spring Boot app
Creating a simple REST API

Source Code

You can go through the Git link to check out the exact code. I write each lesson in a way that makes it easy for you to follow on your own. I have organized the source code in a GitHub repository, which you can find at github.com

📦 Introduction to Spring Boot

Spring Boot is a Java framework built on top of the Spring Framework. It simplifies development by reducing manual configurations and setup.

Instead of writing extensive XML or Java configuration and setting up external servers, Spring Boot provides:

Auto-configuration
Embedded servers
Opinionated defaults
Easy REST API support

This makes it ideal for building standalone, production-ready applications.

🧩 Why Spring Boot Was Introduced

Before Spring Boot:

Projects required lots of configuration
Developers wrote repetitive boilerplate code
Dependency management was manual
You needed an external application server

Spring Boot solves these pain points by standardizing and automating much of the setup.

⭐ Key Features of Spring Boot

✔ Auto-Configuration — Automatically configures the app based on dependencies.

✔ Embedded Servers — Includes Tomcat/Jetty, so no external server is needed.

✔ Easy REST APIs — Build web APIs with minimal code.

✔ Database Integration — Works well with JDBC, JPA, and popular databases.

✔ Spring Security Support — Built-in authentication and authorization support.

🚀 Create a Spring Boot Project

The easiest way is using Spring Initializr:

👉 https://start.spring.io

Steps

Open Spring Initializr
Configure project:
- Project: Maven
- Language: Java
- Spring Boot Version: Default
- Group: com.codewithtejas
- Artifact: store
- Java Version: 17
Add Spring Web dependency
Click Generate
Extract the downloaded .zip file into your workspace

📁 Understanding Project Structure

store
├── .mvn
├── src
│ ├── main
│ │ ├── java
│ │ └── resources
├── pom.xml

Important Parts

pom.xml — Manages dependencies and build.
mvnw / mvnw.cmd — Maven wrapper scripts for consistent builds.
src/main/java — Application source code.
src/main/resources — Config files like application.properties.
src/test/java — Test cases (JUnit).
target/ — Auto-generated build output.

🛠 Managing Dependencies with Maven

Dependencies are defined in pom.xml:

<dependency>
  <groupId>org.springframework.boot</groupId>
  <artifactId>spring-boot-starter-web</artifactId>
</dependency>

groupId → Organization or project group
artifactId → Library name
version → Library version
👉 In Spring Boot, versions are often managed automatically.

spring-boot-starter-web

This single dependency includes:

Spring MVC
Embedded Tomcat
Jackson (JSON)
Validation

Updating Dependencies

After modifying pom.xml:

IDE automatically reloads

Or run:

mvn clean install

Building and running a Spring Boot application

Creating a Simple REST Controller**

Step 1: Create a Controller Class**

Create a new package:

com.codewithtejas.store.controller

Create a class:

@RestController
@RequestMapping("/api")
public class HelloController {

    @GetMapping("/hello")
    public String hello() {
        return "Hello from Spring Boot!";
    }
}

Explanation of Annotations

@RestController → Marks the class as a REST controller
@RequestMapping("/api") → Base URL path
@GetMapping("/hello") → Handles HTTP GET requests

Run Using Maven Wrapper (Terminal / CMD)

** Go to the project root (where pom.xml exists).**

Run Using Maven (If Installed)

mvn spring-boot:run

Open:

http://localhost:8080/hello

🚀 What’s Next?

Now that you understand the basics of Spring Boot, the next important step is learning Dependency Injection (DI) and the Inversion of Control (IoC) Container.

These concepts are the foundation of the Spring Framework and are used everywhere in Spring Boot applications.

Let’s Connect!

Linkedin Github

If you have any recommended resources, better approaches to my challenges, or insights, I’d love to hear them! Drop your thoughts in the comments.

Have a wonderful day!

Setting Up Java & Maven for Spring Boot – Step-by-Step Guide

Tejas Agravat — Sun, 21 Dec 2025 09:07:09 +0000

Introduction

Before starting with Maven or Spring Boot, we need to set up the basic development environment. This includes installing Java (JDK) and Apache Maven.

Canonical Link

Original Hashnode Post

☕ Step 1: Install Java (JDK)

Java is required to compile and run Java applications.

Download Java

Install Java 17 (LTS) (recommended). You can choose OpenJDK / Temurin or Oracle JDK.

Java JDK 17 download link: Sign in to Oracle India and download it.

Windows Installation

Download the .exe installer
Run the installer and follow the steps
Note the installation path (example):

Set JAVA_HOME

Windows:

Create a system variable:

  JAVA_HOME = C:\Program Files\Java\jdk-17

Add to Path:

%JAVA_HOME%\bin

Verify Java Installation

java -version
javac -version

📦 Step 2: Install Apache Maven

Download Apache Maven 3.9.x (Binary zip) from official site
Apache Maven Download Link

Windows Installation

1 Extract the zip file Example:

 C:\Program Files\Apache\maven

2 Folder structure should include:

 bin
 conf
 lib

Set MAVEN_HOME

Windows

Create system variable:

  MAVEN_HOME = C:\Program Files\Apache\maven

Add to Path:

  %MAVEN_HOME%\bin

Verify Maven Installation

mvn -version

Expected output:

Apache Maven 3.9.x
Java version: 17

⚠️ Common Installation Issues

Issue	Fix
`java not recognized`	Check JAVA_HOME
`mvn not recognized`	Check MAVEN_HOME
Wrong Java version	Restart terminal / IDE

✅ Conclusion

After completing these installation steps:

-Java is ready to compile code

-Maven is ready to build projects

-You can now create and run Maven-based Java applications

🚀 What’s Next?

Now that the development environment is ready with Java and Maven, the next steps focus on building a strong foundation before moving into Spring Boot.

Let’s Connect!

LinkedIn Github

If you have any recommended resources, better approaches to my challenges, or insights, I’d love to hear them! Drop your thoughts in the comments.

Have a wonderful day!

Learning Java Spring Boot: A Step-by-Step Backend Development

Tejas Agravat — Sun, 21 Dec 2025 08:20:16 +0000

Java Spring Boot Development Starts – Learning in Public

Introduction

Today, I’m excited to begin a meaningful journey — learning Java Spring Boot with purpose and passion. Over the years, I’ve worked with various technologies, but Spring Boot has always stood out as a major skill for backend development, especially for building scalable, real‑world applications.

So I’m committing to learning it deeply — and most importantly — sharing everything I learn publicly.

Whether you are a beginner, a fellow learner, or someone curious about backend development, I hope this journey inspires you or helps you grow too.

Check out the original version here:

https://tejas-agravat.hashnode.dev

How I Discovered Java Spring Boot

I first encountered Java Spring Boot while working on backend features at my previous projects. I noticed that many enterprise applications and cloud‑ready systems use Spring Boot because of its simplicity, strong ecosystem, and powerful features like:

✔ Auto‑configuration

✔ Embedded servers

✔ Easy REST API support

✔ Strong integration with databases

✔ Built‑in security with Spring Security (authentication & authorization)

Even though I used parts of Spring Boot in practice, I realized my conceptual depth needed improvement. I could write code that worked, but I didn’t always understand why certain things worked the way they did.

That’s when I decided — it’s time to learn Spring Boot from the fundamentals to advanced patterns.

Why Learning in Public

I believe learning is strongest when it’s shared.

Here’s why I’m learning in public:

✨ Consistency: When you share progress publicly, you stay accountable.

✨ Community support: There’s always someone who can teach you or learn with you.

✨ Real feedback: Other developers can help correct mistakes and give guidance.

✨ Helping others: Your journey could be exactly what someone else needs.

So I’ll be sharing lessons, insights, mistakes, and breakthroughs with clear explanations and real examples.

My Java Spring Boot Learning Plan

To stay organized and focused, I created a detailed learning roadmap that guides my steps through Java Spring Boot.

🔗 Roadmap Link: https://whimsical.com/java-spring-boot-road-map-3sAdvMaUzMNucMhaCt9tG9

My plan includes:

📌 Setting up my Java & Spring Boot environment

📌 Understanding Spring Boot basics (Beans, DI, configuration)

📌 Building REST APIs

📌 Connecting with databases (JPA, Hibernate)

📌 Security & authentication

📌 Unit & integration testing

📌 Deployment & cloud readiness

Each week, I’ll cover one or more topics from the roadmap, write examples, and share code walkthroughs.

Join Me on This Journey

This journey isn’t just mine — it’s ours.

If you are learning Spring Boot, want to start backend development, or are simply curious about Java frameworks, I invite you to join me:

👥 Follow my progress

💬 Ask questions

📌 Share your tips

📌 Build alongside me