需求说明:本篇文章是基于SpringMvc框架,要求在web页面可以添加定时任务,启动定时任务,停用定时任务,删除定时任 务,修改定时任务。
注:考虑到定时器在项目启动的时候就要开启,就需要监听器方面的配置,在这里就直接写工具类了,不考虑监听器。
只需要两个类就可以完成动态定时器操作。
1.首先现在项目的Utils包(工具包)下创建工具类 MyQuartz类
2.接着就是我们的代码逻辑类MyJob类
package com.zpkj.space.utils; import org.quartz.Job; import org.quartz.JobExecutionContext; import org.quartz.JobExecutionException; import java.text.SimpleDateFormat; import java.util.Date; /** * Created by 李庆伟 on 2018/3/5. */ public class MyJob implements Job { public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException { //一般是拿当前时间和业务时间比较 System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()) + ": 定时器触发后执行的业务代码..."); } }
package com.zpkj.space.utils; import org.quartz.*; import org.quartz.impl.StdSchedulerFactory; /** * Created by 李庆伟 on 2018/3/5. * 定时器调度任务 */ public class MyQuartz { private static SchedulerFactory schedulerFactory = new StdSchedulerFactory(); /** * 添加一个定时任务 * * @param jobName 任务名 * @param jobGroupName 任务组名 * @param triggerName 触发器名 * @param triggerGroupName 触发器组名 * @param jobClass 定时器触发要执行的内容(可在里面添加业务代码,例如点发邮件了等) * @param cron 时间设置,参考quartz说明文档 */ public static void addJob(String jobName, String jobGroupName, String triggerName, String triggerGroupName, Class jobClass, String cron) { try { Scheduler sched = schedulerFactory.getScheduler(); // 任务名,任务组,任务执行类 JobDetail jobDetail= JobBuilder.newJob(jobClass).withIdentity(jobName, jobGroupName).build(); // 触发器 TriggerBuilder<Trigger> triggerBuilder = TriggerBuilder.newTrigger(); // 触发器名,触发器组 triggerBuilder.withIdentity(triggerName, triggerGroupName); triggerBuilder.startNow(); // 触发器时间设定 triggerBuilder.withSchedule(CronScheduleBuilder.cronSchedule(cron)); // 创建Trigger对象 CronTrigger trigger = (CronTrigger) triggerBuilder.build(); // 调度容器设置JobDetail和Trigger sched.scheduleJob(jobDetail, trigger); // 启动 if (!sched.isShutdown()) { sched.start(); } } catch (Exception e) { throw new RuntimeException(e); } } /** * 修改一个任务的触发时间 * * @param jobName * @param jobGroupName * @param triggerName 触发器名 * @param triggerGroupName 触发器组名 * @param cron 时间设置,参考quartz说明文档 */ public static void modifyJobTime(String jobName, String jobGroupName, String triggerName, String triggerGroupName, String cron) { try { Scheduler sched = schedulerFactory.getScheduler(); TriggerKey triggerKey = TriggerKey.triggerKey(triggerName, triggerGroupName); CronTrigger trigger = (CronTrigger) sched.getTrigger(triggerKey); if (trigger == null) { return; } String oldTime = trigger.getCronExpression(); if (!oldTime.equalsIgnoreCase(cron)) { /** 方式一 :调用 rescheduleJob 开始 */ // 触发器 TriggerBuilder<Trigger> triggerBuilder = TriggerBuilder.newTrigger(); // 触发器名,触发器组 triggerBuilder.withIdentity(triggerName, triggerGroupName); triggerBuilder.startNow(); // 触发器时间设定 triggerBuilder.withSchedule(CronScheduleBuilder.cronSchedule(cron)); // 创建Trigger对象 trigger = (CronTrigger) triggerBuilder.build(); // 方式一 :修改一个任务的触发时间 sched.rescheduleJob(triggerKey, trigger); /** 方式一 :调用 rescheduleJob 结束 */ /** 方式二:先删除,然后在创建一个新的Job */ //JobDetail jobDetail = sched.getJobDetail(JobKey.jobKey(jobName, jobGroupName)); //Class<? extends Job> jobClass = jobDetail.getJobClass(); //removeJob(jobName, jobGroupName, triggerName, triggerGroupName); //addJob(jobName, jobGroupName, triggerName, triggerGroupName, jobClass, cron); /** 方式二 :先删除,然后在创建一个新的Job */ } } catch (Exception e) { throw new RuntimeException(e); } } /** * 移除一个任务 * * @param jobName * @param jobGroupName * @param triggerName * @param triggerGroupName */ public static void removeJob(String jobName, String jobGroupName, String triggerName, String triggerGroupName) { try { Scheduler sched = schedulerFactory.getScheduler(); TriggerKey triggerKey = TriggerKey.triggerKey(triggerName, triggerGroupName); sched.pauseTrigger(triggerKey);// 停止触发器 sched.unscheduleJob(triggerKey);// 移除触发器 sched.deleteJob(JobKey.jobKey(jobName, jobGroupName));// 删除任务 } catch (Exception e) { throw new RuntimeException(e); } } /** * 启动所有定时任务 */ public static void startJobs() { try { Scheduler sched = schedulerFactory.getScheduler(); sched.start(); } catch (Exception e) { throw new RuntimeException(e); } } /** * 关闭所有定时任务 */ public static void shutdownJobs() { try { Scheduler sched = schedulerFactory.getScheduler(); if (!sched.isShutdown()) { sched.shutdown(); } } catch (Exception e) { throw new RuntimeException(e); } } public static String JOB_NAME = "动态任务调度";//任务名称 public static String TRIGGER_NAME = "动态任务触发器";//任务触发器 public static String JOB_GROUP_NAME = "XLXXCC_JOB_GROUP";//触发器名 public static String TRIGGER_GROUP_NAME = "XLXXCC_JOB_GROUP";//触发器组名 public static String JOB_NAME_1 = "动态任务调度_1"; public static String TRIGGER_NAME_1 = "动态任务触发器_1"; public static String JOB_GROUP_NAME_1 = "XLXXCC_JOB_GROUP_1"; public static String TRIGGER_GROUP_NAME_1 = "XLXXCC_JOB_GROUP_1"; public static void main(String[] args) { try { System.out.println("【系统启动】开始(每1秒输出一次)..."); MyQuartz.addJob(JOB_NAME, JOB_GROUP_NAME, TRIGGER_NAME, TRIGGER_GROUP_NAME, MyJob.class, "0/1 * * * * ?"); //MyQuartz.addJob(JOB_NAME_1, TRIGGER_NAME_1, JOB_GROUP_NAME_1, TRIGGER_GROUP_NAME_1, MyJob1.class, "0/2 * * * * ?"); /* Thread.sleep(5000); System.out.println("修改时间==开始(每5秒输出一次)..."); MyQuartz.modifyJobTime(JOB_NAME, JOB_GROUP_NAME, TRIGGER_NAME, TRIGGER_GROUP_NAME, "0/5 * * * * ?"); Thread.sleep(6000); System.out.println("移除定时==开始..."); MyQuartz.removeJob(JOB_NAME, JOB_GROUP_NAME, TRIGGER_NAME, TRIGGER_GROUP_NAME); System.out.println("移除定时==成功");*/ } catch (Exception e) { e.printStackTrace(); } } }
3.关于触发规则参考quartz文档。
语:在程序员的路上不断前行