[Spring Boot2.4.2] AOP(アスペクト指向プログラミング)

pom.xml

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-aop</artifactId>
		</dependency>

AOPファイル TestLog.java

package com.example.demo;
import org.aspectj.lang.annotation.After;
import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class TestLog {
	
	@After("within(com.example.demo.MainController)")
	public void write1() {
		System.out.println("ログイン後");
	}
}

@AspectはAOPとして動作
@After, @Before, @Around, @AfterReturning, @AfterThrowing などがある。

MainController.java

package com.example.demo;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class MainController {
	
	@GetMapping("/test1")
    public String input1() {
        return "test1";
    }
	
	@GetMapping("/test2")
	public String input2(){
        return "test2";
    }
}

Error starting ApplicationContext. To display the conditions report re-run your application with ‘debug’ enabled.
2021-02-07 11:29:27.692 ERROR 43506 — [ restartedMain] o.s.boot.SpringApplication : Application run failed

org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘requestMappingHandlerMapping’ defined in class path resource [org/springframework/boot/autoconfigure/web/servlet/WebMvcAutoConfiguration$EnableWebMvcConfiguration.class]: Invocation of init method failed; nested exception is java.lang.IllegalStateException: Ambiguous mapping. Cannot map ‘test1’ method
com.example.demo.Test1#write1()
to {GET [/test2]}: There is already ‘mainController’ bean method
com.example.demo.MainController#input2() mapped.

ん？　何故だ？？