Spring boot - How to get all loaded beans with Class Type information?

Dive into Spring Boot: Discover All Loaded Beans by Class Type!

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Introduction to Spring Beans

If you're working with Spring Boot, you've likely heard of "Beans." In simple terms, a Bean is just an object that is managed by the Spring Framework. The Spring IoC (Inversion of Control) container is responsible for creating, configuring, and managing these beans throughout their lifecycle.

Why Find Beans by Class Type?

Sometimes, your application might have multiple implementations of an interface, or you just want to verify exactly which beans of a specific type are currently loaded in your ApplicationContext. Knowing how to filter and find these beans programmatically is a powerful debugging and configuration tool.

How it Works in Spring Boot

Spring provides the ListableBeanFactory interface, which allows you to fetch all beans that match a specific class or interface type. This returns a Map where the keys are the bean names and the values are the actual bean instances.

Map<String, MyClass> beans = applicationContext.getBeansOfType(MyClass.class);

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