What will happen if you annotate a class with @RestController but forget to add @GetMapping or any request mapping on its methods?

medium📝 component behavior Q5 of 15

Spring Boot - REST Controllers

What will happen if you annotate a class with @RestController but forget to add @GetMapping or any request mapping on its methods?

AAll methods will respond to GET requests by default

BThe controller will not handle any HTTP requests

CThe application will fail to start

DThe methods will respond to POST requests by default

Step-by-Step Solution

Solution:

Step 1: Understand mapping annotations role
Request mapping annotations like @GetMapping define which HTTP requests a method handles.
Step 2: Effect of missing mappings
Without any mapping, methods are not linked to any URL or HTTP method, so they won't handle requests.
Final Answer:
The controller will not handle any HTTP requests -> Option B
Quick Check:
No mapping = no request handling [OK]

Quick Trick: Methods need mapping annotations to handle requests [OK]

Common Mistakes:

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