What methods do you use to implement request handlers in your application?

Request handlers in Java applications can be implemented in several ways:

1. Servlet API — a class implementing the HttpServlet interface, overriding methods like doGet(), doPost(), etc.

public class MyServlet extends HttpServlet {
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        resp.getWriter().write("Hello from Servlet");
    }
}

2. Spring MVC controllers — annotated classes with methods that handle requests.

@RestController
public class MyController {
    @GetMapping("/hello")
    public String hello() {
        return "Hello from Spring MVC";
    }
}

3. Java EE/Jakarta EE JAX-RS — RESTful services with annotations like @Path, @GET, etc.

@Path("/api")
public class MyResource {
    @GET
    @Path("/hello")
    public String hello() {
        return "Hello from JAX-RS";
    }
}

The choice of method depends on the framework and architecture of the application.