Introduction to @RequestMapping annotation in Spring Boot
@RequestMapping is an important annotation in Spring Boot. It is used to map HTTP requests to specific handler methods in controller classes. It is used to create a mapping between a URI and a method or a controller class. @RequestMapping annotation is used to map HTTP requests to specific handler methods in controller classes. It is used to create a mapping between a URI and a controller class or a method.
Advantages of Using @RequestMapping Annotation
@RequestMapping annotation offers several advantages such as:
• It helps in reducing the complexity of writing controller classes by allowing the mapping of multiple URLs to a single method.
• It helps in separating the logic of the controller class from the logic of the application.
• It provides a unified way to handle requests coming from different sources such as web browsers, mobile devices etc.
• It provides support for various HTTP methods such as GET, POST, PUT, DELETE etc.
Example of @RequestMapping Annotation
Here is a simple example of using the @RequestMapping annotation in Spring Boot.
@Controller
public class HelloController {
@RequestMapping(“/hello”)
public String sayHello(){
return “Hello World!”;
}
}
In the above example, the @RequestMapping annotation is used to map the URL “/hello” to the method sayHello() in the HelloController class. The method sayHello() will return the string “Hello World!” when the URL “/hello” is accessed.
Conclusion
@RequestMapping annotation is an important annotation in Spring Boot that allows you to map URLs to specific handler methods in controller classes. It helps in reducing the complexity of writing controller classes by allowing the mapping of multiple URLs to a single method. It also provides support for various HTTP methods such as GET, POST, PUT, DELETE etc.
