15 Spring Boot Annotations Every Backend Developer Should Know
If you're learning Spring Boot, these 15 annotations appear in almost every real-world backend project.
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Entry point of a Spring Boot application.
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Creates REST APIs and returns JSON responses.
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Maps URLs to controller methods.
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Handles HTTP GET requests.
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Handles HTTP POST requests.
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Updates existing resources.
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Deletes resources.
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Reads values directly from the URL.
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Reads query parameters from requests.
Converts JSON request data into Java objects.
Injects dependencies automatically.
Marks a business logic class.
Marks a database access layer.
Maps a Java class to a database table.
Ensures database operations are completed successfully or rolled back on failure.
Learning annotations is useful, but understanding what happens behind them is even more important.
Which Spring Boot annotation confused you the most when you first started learning backend development?
Posted Jun 17, 2026, 1:12 PM UTC