SpringBoot2 task scheduler 定时任务调度器四种方式

@Component
@Configurable
@EnableScheduling
public class Task1 {
  private static Log logger = LogFactory.getLog(Task1.class);
  @Scheduled(cron = "0/2 * * * * * ")
  public void execute() {
    logger.info("Task1>>" + new Date());
  }
}

@SpringBootApplication
@ImportResource(value = { "classpath:applicationContext*.xml" })
public class Springboot2TaskApplication {

  public static void main(String[] args) {
    SpringApplication.run(Springboot2TaskApplication.class, args);
  }
}

<context:component-scan base-package="com.chenyingjun.task.schedual"></context:component-scan>
<task:scheduler id="appScheduler" pool-size="2" /> 
<!-- 调整定时任务 -->
<task:scheduled-tasks>  
  <task:scheduled ref="task2" method="method2" cron="0/10 * * * * ?"/>
</task:scheduled-tasks>

@Service
public class Task2 {
  private static Log logger = LogFactory.getLog(Task2.class);
  public void method2() {
    logger.info("Task2----method2>>>>" + new Date());
  }
}

<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-context-support</artifactId>
</dependency>
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-tx</artifactId>
</dependency>
<dependency>
  <groupId>org.quartz-scheduler</groupId>
  <artifactId>quartz</artifactId>
  <version>2.3.0</version>
</dependency>

@Configuration
public class SchedledConfiguration {

  /**
   * attention:
   * Details：配置定时任务
   */
  @Bean(name = "jobDetail")
  public MethodInvokingJobDetailFactoryBean detailFactoryBean(Task3 task) {// TestTask为需要执行的任务
    MethodInvokingJobDetailFactoryBean jobDetail = new MethodInvokingJobDetailFactoryBean();
    /*
     * 是否并发执行
     * 例如每5s执行一次任务，但是当前任务还没有执行完，就已经过了5s了，
     * 如果此处为true，则下一个任务会执行，如果此处为false，则下一个任务会等待上一个任务执行完后，再开始执行
     */
    jobDetail.setConcurrent(false);

    // 设置任务的名字
    jobDetail.setName("jobDetailName");

    // 设置任务的分组，这些属性都可以存储在数据库中，在多任务的时候使用
    jobDetail.setGroup("jobDetailGroup");

    /*
     * 为需要执行的实体类对应的对象
     */
    jobDetail.setTargetObject(task);

    /*
     * 通过这几个配置，告诉JobDetailFactoryBean我们需要执行定时执行ScheduleTask类中的task方法
     */
    jobDetail.setTargetMethod("task");
    return jobDetail;
  }

  /**
   * Details：配置定时任务的触发器，也就是什么时候触发执行定时任务
   */
  @Bean(name = "jobTrigger")
  public CronTriggerFactoryBean cronJobTrigger(JobDetail jobDetail) {
    CronTriggerFactoryBean tigger = new CronTriggerFactoryBean();
    tigger.setJobDetail(jobDetail);
    // 初始时的cron表达式，可以改成从数据库中获取
    tigger.setCronExpression("0/2 * * * * ?");
    // trigger的name
    tigger.setName("tiggerName");
    return tigger;

  }

  /**
   * Details：定义quartz调度工厂
   */
  @Bean(name = "scheduler")
  public SchedulerFactoryBean schedulerFactory(Trigger trigger) {
    SchedulerFactoryBean bean = new SchedulerFactoryBean();
    // 用于quartz集群,QuartzScheduler 启动时更新己存在的Job
    bean.setOverwriteExistingJobs(true);
    // 延时启动，应用启动1秒后
    bean.setStartupDelay(1);
    // 注册触发器
    bean.setTriggers(trigger);
    return bean;
  }
}

@Service
public class Task3 {

  @Resource(name = "jobTrigger")
  private CronTrigger cronTrigger;

  @Resource(name = "scheduler")
  private Scheduler scheduler;

  private static Log logger = LogFactory.getLog(Task3.class);

  public void task() {
    logger.info("Task3---------" + new Date());
  }

  /**
   * 设置cron并重启定时器
   * @param cron cron值
   */
  public void setCron(String cron) {
    try {
      // 表达式调度构建器
      CronScheduleBuilder scheduleBuilder = CronScheduleBuilder.cronSchedule(cron);
      // 按新的cronExpression表达式重新构建trigger
      CronTrigger trigger = (CronTrigger) scheduler.getTrigger(cronTrigger.getKey());
      trigger = trigger.getTriggerBuilder().withIdentity(cronTrigger.getKey())
          .withSchedule(scheduleBuilder).build();
      // 按新的trigger重新设置job执行
      scheduler.rescheduleJob(cronTrigger.getKey(), trigger);
    } catch (SchedulerException e) {
      logger.info("cron表达式错误");
    }
  }
}

public class Task4 implements Runnable {

  private ThreadPoolTaskScheduler threadPoolTaskScheduler;

  private static Log logger = LogFactory.getLog(Task4.class);

  @Override
  public void run() {
    logger.info("Task4================" + new Date());
  }

  /**
   * 设置cron并启动
   * @param cronExp cron值
   */
  public void reStart(String cronExp) {
    if (null != this.threadPoolTaskScheduler) {
      ScheduledExecutorService scheduledExecutorService = this.threadPoolTaskScheduler.getScheduledExecutor();
      if (!scheduledExecutorService.isShutdown()) {
        scheduledExecutorService.shutdownNow();
      }

      this.threadPoolTaskScheduler.destroy();
    }

    if (null != cronExp && cronExp.trim().length() > 0) {
      this.threadPoolTaskScheduler = new ThreadPoolTaskScheduler();
      this.threadPoolTaskScheduler.setThreadNamePrefix("task4");
      this.threadPoolTaskScheduler.initialize();
      this.threadPoolTaskScheduler.schedule(this, new CronTrigger(cronExp));
    }
  }
}

/**
   * 初始化task4
   * 这里的代码不应该写在rest层上， 应该写在service层上
   */
  @PostConstruct
  private void initTask4() {
    //初始化task4任务调度器cron，可以从数据库中查询到cron值
    setTask4Cron("0/3 * * * * ?");
  }

  /**
   * 改变task4的cron
   * @param cron cron值
   * @return 成功标志
   */
  @RequestMapping(value = { "/setTask4Cron" }, method = RequestMethod.GET)
  @ResponseBody
  public String setTask4Cron(String cron) {
    if (null == task4) {
      task4 = new Task4();
    }

    task4.reStart(cron);
    return "success";
  }