Handling Multiple Beans of the Same Type in Spring with Qualifier

Written by: Tushar Sharma

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In Spring application, it's common to have multiple beans of the same type. However, this can lead to issues when Spring tries to autowire these beans, as it doesn't know which bean to inject. This problem can be resolved using Qualifier annotation.

Problem of multiple beans

Suppose you have two beans of same type like

When Spring encounters these beans, it will throw an error due to the ambiguity of which bean to autowire.

Solution using Qualifier

To differentiate these beans, you can use the @Qualifier annotation. This annotation helps Spring identify which bean to inject when multiple beans of the same type exist.

Define Beans with @Qualifier:

Autowire Beans with Qualifier

Use the @Qualifier annotation to specify which bean to inject in your components:

Using the @Qualifier annotation in Spring allows you to manage multiple beans of the same type efficiently. By specifying unique qualifiers for each bean and using these qualifiers during autowiring, you can avoid conflicts and ensure your application runs smoothly.