Building an Application with Spring Boot

Category : Spring Boot | Sub Category : Spring Boot | By Prasad Bonam Last updated: 2023-07-09 12:10:41 Viewed : 63

Building an Application with Spring Boot:

Here is a simple example of a Spring Boot application with a RESTful API:

import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RestController; @SpringBootApplication public class MyApplication { public static void main(String[] args) {, args); } } @RestController public class UserController { @GetMapping("/users/{id}") public User getUser(@PathVariable Long id) { // Logic to retrieve user from database User user = userRepository.findById(id); return user; } @PostMapping("/users") public User createUser(@RequestBody User user) { // Logic to save user to database User savedUser =; return savedUser; } } public class User { private Long id; private String name; private String email; // Getters and setters // Constructors }

In this example, we have a MyApplication class annotated with @SpringBootApplication. It serves as the main entry point for the Spring Boot application.

The UserController class is annotated with @RestController, indicating that it handles RESTful API requests. It contains two methods: getUser() and createUser(). The getUser() method handles a GET request to retrieve a user by their ID, while the createUser() method handles a POST request to create a new user.

The User class represents a user entity with id, name, and email properties.

When the application is run, it starts a Spring Boot server, and you can access the RESTful APIs provided by the UserController class at the defined endpoints.

This is a basic example to illustrate the structure of a Spring Boot application with a RESTful API. In a real-world scenario, you would typically have additional components like a service layer, data access layer, and more complex business logic.

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