java 动态增加定时任务示例

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.StdSchhttp://edulerFactory;

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。

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