依赖

在 pom.xml 增加下面依赖

<dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz</artifactId>
    <version>2.3.2</version>
</dependency>

要执行的类

package std;

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

import java.text.SimpleDateFormat;
import java.util.Date;

public class PrintJob implements Job {

    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        String printTime = new SimpleDateFormat("yy-MM-dd HH-mm-ss").format(new Date());
        System.out.println("时间:" + printTime);

    }
}

定时执行

package std;

import org.quartz.*;
import org.quartz.impl.StdSchedulerFactory;

import java.util.concurrent.TimeUnit;

public class Test {
    public static void main(String[] args) throws SchedulerException, InterruptedException {
        // 1、创建调度器Scheduler
        Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
        // 2、创建JobDetail实例，并与PrintWordsJob类绑定(Job执行内容)
        JobDetail jobDetail = JobBuilder.newJob(PrintJob.class)
                .withIdentity("job1", "group1").build();
        // 3、构建Trigger实例,每隔1s执行一次
        Trigger trigger = TriggerBuilder.newTrigger().withIdentity("trigger1", "triggerGroup1")
                .startNow()//立即生效
                .withSchedule(
                        SimpleScheduleBuilder
                            .simpleSchedule()
                            .withIntervalInSeconds(1)//每隔1s执行一次
                            .repeatForever()//一直执行
                        )
                .build();

        //4、将 Trigger触发器 和 Job任务 结合起来
        scheduler.scheduleJob(jobDetail, trigger);
        System.out.println("--------scheduler start ! ------------");
        //5、启动
        scheduler.start();

        //休眠5秒后，停止执行
        TimeUnit.SECONDS.sleep(5);
        //6、关闭
        scheduler.shutdown();
        System.out.println("--------scheduler shutdown ! ------------");
    }
}

参考：https://blog.csdn.net/noaman_wgs/article/details/80984873

原文出处：/show_1IX6opeRzZku.html