<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <version>2.2.4.RELEASE</version>
  </dependency>
 <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
 </parent>

@Component
@Configuration//标记配置类
@EnableScheduling   //开启定时任务
@Slf4j
public class Config  {
  @Scheduled(cron = "0 0 6 * * ? ")
    public void test() {
    	System.out.private("每天早上六点执行");
	}
	@Scheduled(fixedRate = 3000)
	public void test() {
    	System.out.private("每三秒执行，时间单位毫秒");
	}
}