java 动态增加定时任务示例

整理文档，java 动态增加定时任务示例，直接上代码。

import org.apache.tools.ant.util.DateUtils;
import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.impl.StdSchedulerFactory;
import java.util.Calendar;
import java.util.Date;
/**
* @Description: 定时任务管理类
* Created by zhangxb on 2017/2/10.
*/
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
  *
  * @Title: QuartzManager.java
  */
 @SuppressWarnings("unchecked")
 public static void addJob(String jobName, Class cls, String time,Object params) {
   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
     jobDetail.getJobDataMap().put("params", params);
     // 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
  *
  */
 @SuppressWarnings("unchecked")
 public static void addJob(String jobName, String jobGroupName,
              String triggerName, String triggerGroupName, Class jobClass,
              String time,Object params) {
   try {
     Scheduler sched = gSchedulerFactory.getScheduler();
     JobDetail jobDetail = new JobDetail(jobName, jobGroupName, jobClass);// 任务名，任务组，任务执行类
     jobDetail.getJobDataMap().put("params",params);
     // 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
  *
  */
 @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 ,jobDetail.getJobDataMap());
     }
   } catch (Exception e) {
     throw new RuntimeException(e);
   }
 }
/**
  * @Description: 修改一个任务的触发时间
  *
  */
 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
  *
  */
 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
  *
  */
 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
  */
 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
  *
  */
 public static void shutdownJobs() {
   try {
     Scheduler sched = gSchedulerFactory.getScheduler();
     if (!sched.isShutdown()) {
       sched.shutdown();
     }
   } catch (Exception e) {
     throw new RuntimeException(e);
   }
 }
public static String formatTime(Date date){
   //0/1 * * * * ?
   String time = DateUtils.format( date, "s m h d * ?");
   System.out.println(time);
   return time;
 }
}

测试类

import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
/**
* @Description: 任务执行类
* Created by zhangxb on 2017/2/10.
*/
public class QuartzJob implements Job {
 @Override
 public void execute(JobExecutionContext context) throws JobExecutionException {
   Object params =  context.getJobDetail().getJobDataMap().get("params");
   System.out.println(params);
   System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date())+ "★★★★★★★★★★★");
   System.out.println("【移除定时】开始...");
   QuartzManager.removeJob((String)params);
   System.out.println("【移除定时】成功");
 }
 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)...");
     Calendar cal = Calendar.getInstance();
     cal.add( Calendar.SECOND,10);
     QuartzManager.addJob(job_name, QuartzJob.class, QuartzManager.formatTime(cal.getTime()),job_name);
     Thread.sleep(11);
     cal.setTime( new Date());
     cal.add( Calendar.SECOND,10);
     QuartzManager.addJob(job_name+1, QuartzJob.class, QuartzManager.formatTime(cal.getTime()),job_name+1);
     Thread.sleep(11);
//      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, QuartzJob.class, "*/10 * * * * ?");
//      Thread.sleep(60000);
//      System.out.println("【移除定时】开始...");
//      QuartzManager.removeJob(job_name);
//      System.out.println("【移除定时】成功");
   } catch (Exception e) {
     e.printStackTrace();
   }
 }
}

不过最后发现，还是没法做动态延迟。后面用延时mq实现的。

来源：http://www.cnblogs.com/foreverzxb/p/6491190.html