一篇文章教你使用SpringBoot如何实现定时任务

@SpringBootApplication
@EnableScheduling
public class ScheduledApplication {

 public static void main(String[] args) {
  SpringApplication.run(ScheduledApplication.class, args);
 }

}

@Service
public class HelloService {
 //前面任务的结束时间和后面任务的开始时间之间间隔2s
 @Scheduled(fixedDelay = 2000)
 public void fixedDelay() {
  System.out.println("fixedDelay>>"+new Date());
 }
 //两次定时任务开始的间隔时间为2s
 @Scheduled(fixedRate = 2000)
 public void fixedRate() {
  System.out.println("fixedRate>>"+new Date());
 }
 @Scheduled(initialDelay = 2000,fixedDelay = 2000)
 public void initialDelay() {
  System.out.println("initialDelay>>>"+new Date());
 }
}

  @Scheduled(cron = "0/5 * * * * ?")
  public void cron() {
    System.out.println("cron>>"+new Date());
  }

@SpringBootApplication
@EnableScheduling
public class QuartzApplication {
  public static void main(String[] args) {
    SpringApplication.run(QuartzApplication.class, args);
  }
}

@Component
public class MyFirstJob {
  public void sayHello() {
    System.out.println("first job say hello:" + new Date());
  }
}

public class MySecondJob extends QuartzJobBean {
  private String name;

  public void setName(String name) {
    this.name = name;
  }

  @Override
  protected void executeInternal(JobExecutionContext jobExecutionContext) throws JobExecutionException {
    System.out.println("second job say hello:" + name + ":" + new Date());
  }
}

@Configuration
public class QuartzConfig {
  @Bean
  MethodInvokingJobDetailFactoryBean methodInvokingJobDetailFactoryBean() {
    MethodInvokingJobDetailFactoryBean bean = new MethodInvokingJobDetailFactoryBean();
    bean.setTargetBeanName("myFirstJob");
    bean.setTargetMethod("sayHello");
    return bean;
  }

  @Bean
  JobDetailFactoryBean jobDetailFactoryBean() {
    JobDetailFactoryBean bean = new JobDetailFactoryBean();
    JobDataMap map = new JobDataMap();
    map.put("name", "Yolo");
    bean.setJobDataMap(map);
    bean.setJobClass(MySecondJob.class);
    return bean;
  }

  @Bean
  SimpleTriggerFactoryBean simpleTriggerFactoryBean() {
    SimpleTriggerFactoryBean bean = new SimpleTriggerFactoryBean();
    bean.setJobDetail(methodInvokingJobDetailFactoryBean().getObject());
    bean.setStartTime(new Date());
    bean.setRepeatInterval(2000);
    bean.setRepeatCount(3);
    return bean;
  }

  @Bean
  CronTriggerFactoryBean cronTriggerFactoryBean() {
    CronTriggerFactoryBean bean = new CronTriggerFactoryBean();
    bean.setJobDetail(jobDetailFactoryBean().getObject());
    bean.setCronExpression("* * * * * ?");
    return bean;
  }

  @Bean
  SchedulerFactoryBean schedulerFactoryBean() {
    SchedulerFactoryBean bean = new SchedulerFactoryBean();
    bean.setTriggers(simpleTriggerFactoryBean().getObject(),cronTriggerFactoryBean().getObject());
    return bean;
  }
  @Bean
  HelloService helloService() {
    return new HelloService();
  }
}