Handle HTTP POST, PUT, GET and HTTP Delete Requests - Store Users Temporary | RESTful Web Services

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Mastering CRUD Operations in Spring Boot

Understanding the four basic HTTP methods—POST, PUT, GET, and DELETE—is the foundation of building any RESTful Web Service. In this tutorial, we implement a complete CRUD flow using a temporary employee storage system in Spring Boot.

The CRUD Lifecycle

We walk through each operation step-by-step to show how data is created, retrieved, updated, and removed from our application:

• POST: Creating new employee records and understanding request bodies.
• GET: Fetching all employees or a specific individual using path variables.
• PUT: Updating existing employee information efficiently.
• DELETE: Removing records securely from our temporary storage.

Why Use Temporary Storage?

Before diving into complex databases, mastering the logic with an in-memory collection (like a Map or List) helps you focus on REST principles and Controller design. It’s a crucial stepping stone for every developer to understand how data flows through the application layers.

Level Up Your API Skills

By the end of this tutorial, you'll have a clear understanding of how to structure your Spring Boot controllers to handle standard web requests professionally. This knowledge is essential for building everything from simple microservices to large-scale enterprise systems.

📥 Download Slides & Source Code!

I have shared the full source code and PowerPoint presentation for this CRUD tutorial! Check out the download links in the YouTube video description.