springboot common annotations

The following are some common Spring Boot annotations and the Markdown format of common interview questions:

Spring Boot common annotations

1. Controller-related annotations
   @RestController : Mark the class as a RESTful controller, which is used to handle HTTP requests and return RESTful responses.
   @RequestMapping : Mapping HTTP requests to controller processing methods.
   @GetMapping, @PostMapping, @PutMapping , @DeleteMapping : respectively map HTTP GET, POST, PUT, and DELETE requests to the corresponding processing methods.
2. Database and persistence related annotations
   @Entity : Mark the class as a JPA entity class for mapping with database tables.
   @Repository : Mark the class as a data access component for operating on the database.
   @Autowired : Automatically assemble dependent objects, usually used to inject data access objects (such as Repository) or service objects.
3. Notes on services and business logic :
   @Service : Mark the class as a service component, which is used to handle business logic.
   @Transactional : Mark a method or class as a transactional operation, ensuring that a set of operations either all succeed or all are rolled back.
4. Notes on data verification and form processing
   @Valid : Indicates that parameter verification is enabled and is used for data verification on controller method parameters.
   @RequestBody : Bind the JSON or XML data of the HTTP request to the method parameters.
   @ModelAttribute : Bind request parameters to method parameters for receiving form data.
5. Notes on scheduled tasks and scheduling
   @Scheduled : used to execute scheduled tasks at specific time intervals or fixed points in time.
   @EnableScheduling : Enables support for scheduling tasks.
   The above are just some common Spring Boot annotations. The specific usage and scenarios may vary depending on project requirements and architecture.

Spring Boot common interview questions

1. What is Spring Boot? What are its main features?
2. What are the advantages of Spring Boot? Why use it to develop applications?
3. How does Spring Boot implement automatic configuration?
4. Please explain the core principles and working mechanism of Spring Boot.
5. How does Spring Boot handle external configuration files?
6. What is Starter in Spring Boot? What does it do?
7. How does Spring Boot handle logs?
8. How does Spring Boot implement hot deployment (Hot Deployment)?
9. What is the relationship between Spring Boot and Spring and Spring MVC?
10. Please explain the role and usage scenarios of Spring Boot Actuator.

These questions are designed to test the interviewer's understanding and practical application experience of Spring Boot. It is recommended to carefully study the relevant documentation and examples of Spring Boot before the interview and be prepared to answer these questions.