定时器的2种方式和用法

引入pom插件

   org.quartz-scheduler
   quartz
   2.3.0

import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.stereotype.Component;


@Component
public class TestScheduler implements ApplicationRunner {

    @Override
    public void run(ApplicationArguments args) throws Exception {
        appStart();
    }

    
    public  void appStart() throws SchedulerException, InterruptedException {
        // 1、创建调度器Scheduler
        SchedulerFactory schedulerFactory = new StdSchedulerFactory();
        Scheduler scheduler = schedulerFactory.getScheduler();
        // 2、创建JobDetail实例，并与PrintWordsJob类绑定(Job执行内容)
        JobDetail jobDetail = JobBuilder.newJob(TestTimer.class)
                .withIdentity("job1", "group1").build();
        // 3、构建Trigger实例,每隔1s执行一次
       

        // 3、构建Trigger实例,按照cron表达式执行 在线表达式网址：https://cron.qqe2.com/
        CronTrigger trigger = TriggerBuilder.newTrigger().withIdentity("trigger1", "triggerGroup1")
                .usingJobData("trigger1", "这是jobDetail1的trigger")
                .startNow()//立即生效
                .withSchedule(CronScheduleBuilder.cronSchedule("1-30 * * * * ? * "))
                .build();

        //4、执行
        scheduler.scheduleJob(jobDetail, trigger);
        System.out.println("--------scheduler start ! ------------");
        scheduler.start();

        //睡眠
       


    }
}

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import org.springframework.stereotype.Component;
import javax.annotation.PostConstruct;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Random;

@Component
public class TestTimer implements Job {

    private static TestTimer  testTimer ;
    @PostConstruct //通过@PostConstruct实现初始化bean之前进行的操作
    public void init() {
        testTimer = this;
        // 初使化时将已静态化的testService实例化
    }

    
    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        String printTime = new SimpleDateFormat("yy-MM-dd HH-mm-ss").format(new Date());
        System.out.println("PrintWordsJob start at:" + printTime + ", prints: Hello Job-" + new Random().nextInt(100));
    }

}

控制台打印效果图: 

在需要调用定时器的方法上加入这个注解

@Scheduled(cron = "${corn.time}")

然后再配置文件里填入时间表达式

corn.time=0 */2 * * * ?