Java 获取 @Scheduled注解

可以通过反射获取到带有 @Scheduled 注解的方法，然后再获取注解的属性值。具体实现可以参考以下代码：

import org.springframework.scheduling.annotation.Scheduled;

import java.lang.reflect.Method;

public class ScheduledAnnotationUtils {

    public static void main(String[] args) throws NoSuchMethodException {
        Class<?> clazz = ScheduledTask.class;
        Method method = clazz.getMethod("task");
        Scheduled scheduled = method.getAnnotation(Scheduled.class);
        String cron = scheduled.cron();
        System.out.println(cron);
    }

    static class ScheduledTask {
        @Scheduled(cron = "0/5 * * * * ?")
        public void task() {
            System.out.println("task");
        }
    }
}

输出结果为：`0/5 * * * * ?`