目录

 

简单用法

配置cronSchedule的写法

 

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简单用法

直接@EnableScheduling后，方法上加上@Scheduled(cron = "0 */1 * * * * ")就行了。

此种方式需要写死时间、写死实现，生产环境不方便配置控制。

 

 

@EnableScheduling
@SpringBootApplication
public class TestApplication {public static void main(String[] args) {SpringApplication.run(DataCheckApplication.class, args);}
//30秒执行一次
@Scheduled(fixedRate = 1000 * 30)public void reportCurrentTime(){System.out.println ("Scheduling Tasks Examples: The time is now " + dateFormat ().format (new Date ()));}
//每1分钟执行一次@Scheduled(cron = "0 */1 *  * * * ")public void reportCurrentByCron(){System.out.println ("Scheduling Tasks Examples By Cron: The time is now " + dateFormat ().format (new Date ()));}private SimpleDateFormat dateFormat(){return new SimpleDateFormat ("HH:mm:ss");}
}

 

配置cronSchedule的写法

启动类

 

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

 

 

任务类

public class CheckJob implements Job {@Overridepublic void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {System.out.println ("Scheduling Tasks Examples")}
}

初始任务

 

public void initTask(){//1.创建Scheduler的工厂SchedulerFactory sf = new StdSchedulerFactory();try {//2.从工厂中获取调度器实例Scheduler scheduler = sf.getScheduler();//3.启动 调度器scheduler.start();//4.创建JobDetailJobDetail jobDetail =JobBuilder.newJob(CheckJob.class).withDescription("数据库操作定时任务").withIdentity("jobName", "group").usingJobData("name", 1).build();//5.创建TriggerTrigger trigger = TriggerBuilder.newTrigger().withDescription("定时任务，可自定义时间执行").withIdentity("jobName", "group")//默认在当前时间启动.startAt(new Date())//重复执行的次数.withSchedule(CronScheduleBuilder.cronSchedule("0 0/5 * * * ?")).build();//6.注册任务和定时器scheduler.scheduleJob(jobDetail, trigger);} catch (Exception e) {e.printStackTrace();}
}

这样任务就可以每隔五分钟执行一次了。