整理文档，java 动态增加定时任务示例，直接上代码。
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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。
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持创新互联。
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