Spring Boot

Spring Boot#

Spring Boot is a Java-based framework used to create stand-alone, production-grade Spring applications with minimal configuration. It simplifies the bootstrapping and development of new Spring applications by providing various capabilities like auto-configuration, standalone code, and opinionated defaults.

Tree Achitecture#

• java/: Contains Java source code, including the main application class.
• resources/: Stores configuration files, static assets, and templates.
• test/: Holds test classes and resources.
• static/: For static files like CSS and JavaScript.
• templates/: For server-side templates.
• service/: Contains business logic implementation.
• models/: Defines data structures.
• repository/: Handles database operations.
• META-INF/: For special files like MANIFEST.MF.
• target/: Generated build artifacts.
• pom.xml or build.gradle: Build configuration files.

Annotations#

• @Controller: Marks a class as a Spring MVC controller, handling HTTP requests.
• @RestController: Combines @Controller and @ResponseBody, making it suitable for building RESTful APIs.
• @RequestMapping: Maps all HTTP verbs to controller methods.
• @GetMapping, @PostMapping, @PutMapping, @DeleteMapping: Specialized versions of @RequestMapping for specific HTTP methods.
• @PathVariable: Extracts values from the URI and maps them to method parameters.
• @RequestParam: Binds HTTP request parameters to method parameters.
• @RequestBody: Binds HTTP request body to a method parameter, typically used for receiving JSON or XML data in RESTful APIs.
• @ResponseBody: Indicates that the return value of a method should be serialized and included in the HTTP response body.
• @Autowired: Performs automatic dependency injection of Spring components.
• @Service: Marks a class as a service component, often used for business logic.
• @Repository: Marks a class as a repository component, typically used for database access.