Spring Boot AOP #before not working - spring

Question

I have written this code :
It seems perfect but not working
When i run the code it runs fine
I hit the URL for (/) and only the greetings method is called
AOP method is not getting called
This is my main Class
DemoApplication.java
package com.example;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import com.aop.AOPSample;
com.services.TaskService;
#SpringBootApplication
#ComponentScan({"com.aop","com.services"})
#RestController
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
#RequestMapping("/")
public void greetings(){
new TaskService().startService();
System.out.println("In Greetings");
}
}
AOPSample.java
package com.aop;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.springframework.stereotype.Component;
#Aspect
#Component
public class AOPSample {
#Before("execution(public void com.services.TaskService.startService())")
public void beforeSampleCreation() {
System.out.println("Hello world");
}
}
TaskService.java
package com.services;
public class TaskService {
public void startService(){
}
public void endService(){
}
}
Output:
In Greetings