@Qualifier vs @Primary in Spring Boot | Dependency Injection Simplified
Java Spring Boot Interview Q18 !!
In this video, we explore two essential Spring Boot annotations: @Qualifier and @Primary. Understanding these annotations is crucial for mastering dependency injection and resolving bean conflicts in Spring applications.
We begin by explaining what the @Qualifier annotation does, why it is used in Spring Boot, and the scenarios where it becomes necessary. You’ll also learn about some of its limitations and why relying solely on @Qualifier may not always be ideal.
Next, we cover the @Primary annotation — how it helps define a default bean when multiple candidates are available, and how it works together with @Qualifier to support cleaner, conflict-free dependency injection.
This video is especially helpful for those trying to understand the dependency inversion principle, Spring Boot annotations, and the practical differences between @Qualifier and @Primary.
Whether you're preparing for interviews or working on real-world Spring Boot projects, this tutorial will give you clarity and confidence in using these annotations.
00:00 : Introduction
00:38 : @Qualifier Hands On : Example 1
06:58 : @Qualifier Hands On : Example 2
11:34 : @Primary Annotation
12:46 : Interview Tip of the Day !!
Spring Boot Basics to Know :
Spring Boot and Java Setup
• Spring Boot and Java Setup
Project Object Model File | Understanding pom.xml
• Project Object Model File | Understanding ...
How to create an API ?
• How to create an API ?
How to Connect Spring Boot to a Database ?
• How to Connect Spring Boot to a Database ?
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