spring boot annotation

Spring Boot uses annotations to reduce boilerplate code and make development faster. Instead of writing XML configuration, we use simple annotations to configure our application ..

Types of annotation

@SpringBootApplication
@RestController
@RequestMapping
@GetMapping
@PostMapping
@PutMapping
@DeleteMapping
@pathvariables

*@SpringBootApplication *

SpringBootApplication is the main annotation used to start a Spring Boot application.

@RestController

@RestController is used to create RESTful web services (APIs).

*@RequestMapping *

Maps HTTP requests to a class or method; used to define a base URL or endpoint

@GetMapping

Handles HTTP GET requests to retrieve data from the server.

@PostMapping

Handles HTTP POST requests to create new data on the server.

@PutMapping

Handles HTTP PUT requests to update existing data.

@DeleteMapping

Handles HTTP DELETE requests to remove data from the server

** @PathVariable**

Used to extract values from the URL and pass them as method parameters

Quick One-Line Summary

@SpringBootApplication → Start & configure app

@RestController → Create REST APIs

@RequestMapping → Define URL path

@GetMapping → Read data

@PostMapping → Create data

@PutMapping → Update data

@DeleteMapping → Delete data

@PathVariable → Get value from URL