在spring的aop中获取自定义注解的参数值，即在切面中获取annotation的参数值

annotation

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface Delete {

	String key() default "";
}

@Aspect
@Component
public class Aspect {

	@After(value = "@annotation(d)", argNames = "d")
	public void after(Delete d) {
		System.out.println(d.key());
		System.out.println("after");
	}
}

@Service
public class UserService {

	@Delete(key = "abc")
	public void update() {
		System.out.println("update user");
	}
}