Spring Boot DTO Tutorial (Using Java record) – Complete CRUD REST API Implementation

Learn how to use DTOs in Spring Boot with Java record. Implement CRUD operations in the service, repository, and controller layers. Handle exceptions and use MapStruct for efficient mapping.

🚀 Introduction to DTOs in Spring Boot

When developing REST APIs in Spring Boot, returning entities directly can expose sensitive data and tightly couple the API response with the database structure.

✅ Solution? Use DTOs (Data Transfer Objects).

A DTO (Data Transfer Object) is a plain Java object used to carry data between layers. In Spring Boot, DTOs prevent over-exposing database entities and help maintain clean architecture.

📌 Why Use DTOs Instead of Entities?

Why Use DTOs Instead of Entities?

1️⃣ What is a Java record and Why Use It for DTOs?

Java record was introduced in Java 14 and became a stable feature in Java 16. A Java record is a special class used to store immutable data.

✅ Why Use record for DTOs?
✔ Immutability – Prevents unintentional modifications…