springboot的定时任务

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
</dependency>

package com.example.demo;

@SpringBootApplication
@EnableScheduling
public class DemoApplication {

    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
        System.out.println("你好");
    }
}

package com.example.demo.Time;

@Component
public class timer {
    @Scheduled(cron = "0/15 * * * * ? ")  //每隔15秒执行一次
    private void test(){
        System.out.println("任务开始时间："+new Date());
    }
}