Quartz 2.2 的实现原理和运行过程, http://blog.csdn.net/xlxxcc/article/details/52104463
Quartz 2.2 动态添加、修改和删除定时任务
下面直接上代码：
QuartzManager.java 动态添加、修改和删除定时任务管理类
import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.Job;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.JobKey;
import org.quartz.Scheduler;
import org.quartz.SchedulerFactory;
import org.quartz.Trigger;
import org.quartz.TriggerBuilder;
import org.quartz.TriggerKey;
import org.quartz.impl.StdSchedulerFactory;
public class QuartzManager {
private static SchedulerFactory schedulerFactory = new StdSchedulerFactory();
/**
* @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 cron 时间设置，参考quartz说明文档
*/
@SuppressWarnings({ "unchecked", "rawtypes" })
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 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);
}
}
/**
* @Description: 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 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 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);
}
}
/**
* @Description: 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);
}
}
/**
* @Description: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);
}
}
/**
* @Description: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);
}
}
}
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MyJob.java 任务类
import java.util.Date;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
public class MyJob implements Job{
public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
System.out.println(new Date() + ": doing something...");
}
}
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Test.Java 测试类
public class Test {
public static String JOB_NAME = "动态任务调度";
public static String TRIGGER_NAME = "动态任务触发器";
public static String JOB_GROUP_NAME = "XLXXCC_JOB_GROUP";
public static String TRIGGER_GROUP_NAME = "XLXXCC_JOB_GROUP";
public static void main(String[] args) {
try {
System.out.println("【系统启动】开始(每1秒输出一次)...");
QuartzManager.addJob(JOB_NAME, JOB_GROUP_NAME, TRIGGER_NAME, TRIGGER_GROUP_NAME, MyJob.class, "0/1 * * * * ?");
Thread.sleep(5000);
System.out.println("【修改时间】开始(每5秒输出一次)...");
QuartzManager.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...");
QuartzManager.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();
}
}
}
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