quartz 简单定时器

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
    <version>2.1.8.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz</artifactId>
    <version>2.3.0</version>
</dependency>
<dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz-jobs</artifactId>
    <version>2.3.0</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>8.0.13</version>
</dependency>

package com.newpwr.wechat.service;

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

public class HelloJob implements Job {
    public static void main(String[] args) throws SchedulerException {
        cc();
    }
    @Override
    public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
        System.out.println("hello~~~~~~~~~~~~~~~~~~");
    }

    public static void cc() throws SchedulerException {
        //定时器对象
        Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
        //定义一个工作对象 设置工作名称与组名
        JobDetail job =JobBuilder.newJob(HelloJob.class).withIdentity("job41","group1").build();
        //定义一个触发器 简单Trigger 设置工作名称与组名 5秒触发一次
        // Trigger trigger = TriggerBuilder.newTrigger().withIdentity("trigger1","group1").startNow().withSchedule(SimpleScheduleBuilder.repeatSecondlyForever(5)).build();
        //定义一个任务调度的Trigger 设置工作名称与组名 每天的15:4触发一次
        Trigger trigger = TriggerBuilder.newTrigger().withIdentity("trigger1","group1").withSchedule(CronScheduleBuilder.cronSchedule("0 4 15 1-31 * ? *")).build();
        //设置工作 与触发器
        scheduler.scheduleJob(job, trigger);
        // and start it off
        //开始定时任务
        scheduler.start();
    }
}