[심화] 11. Reflection 예제

package ex02;

// B 개발자가 만든 것
public class UserController {
    public void login(int n1, String s1) {
        System.out.println("login 호출 됨");
    }

    public void join() {
        System.out.println("join 호출 됨");
    }

    public void logout() {
        System.out.println("logout 호출 됨");
    }
}

package ex02;

import java.lang.reflect.Method;
import java.lang.reflect.Parameter;

// A 개발자가 만든 것
public class App {
    public static void main(String[] args) {
        String path = "/login";

        Method[] methods = UserController.class.getDeclaredMethods();

        for (Method method : methods) {
            System.out.println(method.getName());

            if (method.getName().equals("login")) {
                int paramCount = method.getParameterCount();
                System.out.println(paramCount);

                Parameter[] params = method.getParameters();
                for (Parameter param : params) {
                    System.out.println(param.getName());
                    System.out.println(param.getType());
                }

            }
        }
    }
}

Annotation anno = method.getDeclaredAnnotation(RequestMapping.class);
RequestMapping rm = (RequestMapping) anno;