Quartz1.7 动态添加、修改和删除定时任务(非spring集成版)

一、Quartz简介

Quartz是一个由James House创立的开源项目，是一个功能强大的作业调度工具，可以计划的执行任务，定时、循环或在某一个时间来执行我们需要做的事，这可以给我们工作上带来很大的帮助。例如，你的程序中需要每个月的一号导出报表、定时发送邮件或程序需要每隔一段执行某一任务……等等，都可以用Quartz来解决。


Quartz大致可分为三个主要的核心：


1、调度器Scheduler:是一个计划调度器容器，容器里面可以盛放众多的JobDetail和Trigger，当容器启动后，里面的每个JobDetail都会根据Trigger按部就班自动去执行.


2、任务Job：要执行的具体内容。JobDetail:具体的可执行的调度程序，包含了这个任务调度的方案和策略。


3、触发器Trigger：调度参数的配置，什么时候去执行调度。


可以这么理解它的原理：调度器就相当于一个容器，装载着任务和触发器。任务和触发器又是绑定在一起的，然而一个任务可以对应多个触发器，但一个触发器却只能对应一个任务。当JobDetail和Trigger在scheduler容器上注册后，形成了装配好的任务作业（JobDetail和Trigger所组成的一对儿），就可以伴随容器启动而调度执行了

二、实例：下面例子采用了quartz1.7实现两个任务(job)的切换、添加、移除

1、任务调度：

package quartz;import org.quartz.CronTrigger;import org.quartz.JobDetail;import org.quartz.Scheduler;import org.quartz.SchedulerFactory;import org.quartz.impl.StdSchedulerFactory;/** * @Description: 定时任务管理类 *  * @ClassName: QuartzManager * @date 2014-6-26 下午03:15:52 * @version V2.0 */public class QuartzManager {private static SchedulerFactory gSchedulerFactory = new StdSchedulerFactory();private static String JOB_GROUP_NAME = "EXTJWEB_JOBGROUP_NAME";private static String TRIGGER_GROUP_NAME = "EXTJWEB_TRIGGERGROUP_NAME";/** * @Description: 添加一个定时任务，使用默认的任务组名，触发器名，触发器组名 *  * @param jobName *            任务名 * @param cls *            任务 * @param time *            时间设置，参考quartz说明文档 *  * @date 2014-6-26 下午03:47:44 * @version V2.0 */@SuppressWarnings("unchecked")public static void addJob(String jobName, Class cls, String time) {try {Scheduler sched = gSchedulerFactory.getScheduler();JobDetail jobDetail = new JobDetail(jobName, JOB_GROUP_NAME, cls);// 任务名，任务组，任务执行类// 触发器CronTrigger trigger = new CronTrigger(jobName, TRIGGER_GROUP_NAME);// 触发器名,触发器组trigger.setCronExpression(time);// 触发器时间设定sched.scheduleJob(jobDetail, trigger);// 启动if (!sched.isShutdown()) {sched.start();}} catch (Exception e) {throw new RuntimeException(e);}}/** * @Description: 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 *            任务 * @param time *            时间设置，参考quartz说明文档 *  * @Title: QuartzManager.java * @date 2014-6-26 下午03:48:15 * @version V2.0 */@SuppressWarnings("unchecked")public static void addJob(String jobName, String jobGroupName,String triggerName, String triggerGroupName, Class jobClass,String time) {try {Scheduler sched = gSchedulerFactory.getScheduler();JobDetail jobDetail = new JobDetail(jobName, jobGroupName, jobClass);// 任务名，任务组，任务执行类// 触发器CronTrigger trigger = new CronTrigger(triggerName, triggerGroupName);// 触发器名,触发器组trigger.setCronExpression(time);// 触发器时间设定sched.scheduleJob(jobDetail, trigger);} catch (Exception e) {throw new RuntimeException(e);}}/** * @Description: 修改一个任务的触发时间(使用默认的任务组名，触发器名，触发器组名) *  * @param jobName * @param time *  * @Title: QuartzManager.java * @date 2014-6-26 下午03:49:21 * @version V2.0 */@SuppressWarnings("unchecked")public static void modifyJobTime(String jobName, String time) {try {Scheduler sched = gSchedulerFactory.getScheduler();CronTrigger trigger = (CronTrigger) sched.getTrigger(jobName,TRIGGER_GROUP_NAME);if (trigger == null) {return;}String oldTime = trigger.getCronExpression();if (!oldTime.equalsIgnoreCase(time)) {JobDetail jobDetail = sched.getJobDetail(jobName,JOB_GROUP_NAME);Class objJobClass = jobDetail.getJobClass();removeJob(jobName);addJob(jobName, objJobClass, time);}} catch (Exception e) {throw new RuntimeException(e);}}/** * @Description: 修改一个任务的触发时间 *  * @param triggerName * @param triggerGroupName * @param time *  * @Title: QuartzManager.java * @date 2014-6-26 下午03:49:37 * @version V2.0 */public static void modifyJobTime(String triggerName,String triggerGroupName, String time) {try {Scheduler sched = gSchedulerFactory.getScheduler();CronTrigger trigger = (CronTrigger) sched.getTrigger(triggerName,triggerGroupName);if (trigger == null) {return;}String oldTime = trigger.getCronExpression();if (!oldTime.equalsIgnoreCase(time)) {CronTrigger ct = (CronTrigger) trigger;// 修改时间ct.setCronExpression(time);// 重启触发器sched.resumeTrigger(triggerName, triggerGroupName);}} catch (Exception e) {throw new RuntimeException(e);}}/** * @Description: 移除一个任务(使用默认的任务组名，触发器名，触发器组名) *  * @param jobName *  * @Title: QuartzManager.java * @date 2014-6-26 下午03:49:51 * @version V2.0 */public static void removeJob(String jobName) {try {Scheduler sched = gSchedulerFactory.getScheduler();sched.pauseTrigger(jobName, TRIGGER_GROUP_NAME);// 停止触发器sched.unscheduleJob(jobName, TRIGGER_GROUP_NAME);// 移除触发器sched.deleteJob(jobName, JOB_GROUP_NAME);// 删除任务} catch (Exception e) {throw new RuntimeException(e);}}/** * @Description: 移除一个任务 *  * @param jobName * @param jobGroupName * @param triggerName * @param triggerGroupName *  * @Title: QuartzManager.java * @date 2014-6-26 下午03:50:01 * @version V2.0 */public static void removeJob(String jobName, String jobGroupName,String triggerName, String triggerGroupName) {try {Scheduler sched = gSchedulerFactory.getScheduler();sched.pauseTrigger(triggerName, triggerGroupName);// 停止触发器sched.unscheduleJob(triggerName, triggerGroupName);// 移除触发器sched.deleteJob(jobName, jobGroupName);// 删除任务} catch (Exception e) {throw new RuntimeException(e);}}/** * @Description:启动所有定时任务 *  *  * @Title: QuartzManager.java * @date 2014-6-26 下午03:50:18 * @version V2.0 */public static void startJobs() {try {Scheduler sched = gSchedulerFactory.getScheduler();sched.start();} catch (Exception e) {throw new RuntimeException(e);}}/** * @Description:关闭所有定时任务 *  *  * @Title: QuartzManager.java * @date 2014-6-26 下午03:50:26 * @version V2.0 */public static void shutdownJobs() {try {Scheduler sched = gSchedulerFactory.getScheduler();if (!sched.isShutdown()) {sched.shutdown();}} catch (Exception e) {throw new RuntimeException(e);}}}

2、具体的任务执行：

package quartz;import java.text.SimpleDateFormat;import java.util.Date;import org.quartz.Job;import org.quartz.JobExecutionContext;import org.quartz.JobExecutionException;/** * @Description: 任务执行类 * * @ClassName: QuartzJob * @date 2014-6-26 下午03:37:11 * @version V2.0 */public class QuartzJob implements Job {@Overridepublic void execute(JobExecutionContext arg0) throws JobExecutionException {System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())+ "我是任务1-----------------");  }}

具体任务2：

package quartz;import java.text.SimpleDateFormat;import java.util.Date;import org.quartz.Job;import org.quartz.JobExecutionContext;import org.quartz.JobExecutionException;/** * @Description: 任务执行类 * * @ClassName: QuartzJob * @date 2014-6-26 下午03:37:11 * @version V2.0 */public class QuartzJob implements Job {@Overridepublic void execute(JobExecutionContext arg0) throws JobExecutionException {System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())+ "我是任务2===================");  }}

3、测试：

package quartz;/** * @Description: 测试 * * @ClassName: QuartzTest * @version V2.0 */public class QuartzTest {public static void main(String[] args) {try {String job_name = "动态任务调度";System.out.println("【系统启动】开始(每1秒输出一次)...");  QuartzManager.addJob(job_name, QuartzJob.class, "0/1 * * * * ?");  Thread.sleep(5000);  System.out.println("【修改时间】开始(每2秒输出一次)...");  QuartzManager.modifyJobTime(job_name, "10/2 * * * * ?");  Thread.sleep(6000);  System.out.println("【移除定时】开始...");  QuartzManager.removeJob(job_name);  System.out.println("【移除定时】成功");  System.out.println("【再次添加定时任务】开始(每10秒输出一次)...");  QuartzManager.addJob(job_name+"1", QuartzJob1.class, "*/10 * * * * ?");  Thread.sleep(60000);  System.out.println("【移除定时】开始...");  QuartzManager.removeJob(job_name+"1");  System.out.println("【移除定时】成功");} catch (Exception e) {e.printStackTrace();}}}

代码下载：http://download.csdn.net/detail/liuxiao723846/8826285

文章参考：http://blog.csdn.net/pengpegv5yaya/article/details/37595889