原文地址:http://blog.csdn.net/shawearn1027/article/details/51457495
【寫在前面】
1. 本文中使用的 Quartz 版本爲 1.8.6;
2. 本文不會對 Quartz 做太多介紹;
3. 本文不會對代碼做過多解釋,因爲大部分已經在代碼的註釋中說明過了;
4. 目前官網上最新的 Quartz 版本爲 2.2.3,最新版的接口與本文所採用的 1.8.6 接口並不相同,使用本例代碼請注意 Quartz 版本問題;
5. Quartz 官網地址:http://www.quartz-scheduler.org/
6. 本文爲作者原創,轉載請註明文章出處:http://blog.csdn.net/shawearn1027
【正文】
1. 定義對任務的管理的接口:
package com.shawearn.quartz.util;
import java.text.ParseException;
import org.quartz.SchedulerException;
/**
* 定時任務工具類,用於管理定時任務;
*
* @author Shawearn
*
*/
public interface QuartzUtil {
/**
* 添加一個定時任務,使用傳入的任務名、任務羣組名、觸發器名、觸發器羣組名;
*
* @param jobName 任務名;
* @param jobGroupName 任務的羣組名;
* @param triggerName 觸發器名;
* @param triggerGroupName 觸發器羣組名;
* @param jobClass 任務類;
* @param cronExpression cron表達式,用於指定任務的執行時間,參考 Quartz 說明文檔;
* @throws SchedulerException
* @throws ParseException
*/
public void addJob(String jobName, String jobGroupName, String triggerName, String triggerGroupName, Class jobClass, String cronExpression) throws SchedulerException, ParseException;
/**
* 修改任務的執行時間;
*
* @param jobName 任務名;
* @param jobGroupName 任務的羣組名;
* @param triggerName 觸發器名;
* @param triggerGroupName 觸發器羣組名;
* @param cronExpression cron表達式,用於指定任務的執行時間,參考 Quartz 說明文檔;
* @throws SchedulerException
* @throws ParseException
*/
public void modifyJobTime(String jobName, String jobGroupName, String triggerName, String triggerGroupName, String cronExpression) throws SchedulerException, ParseException;
/**
* 移除指定任務;
*
* @param jobName 任務名;
* @param jobGroupName 任務的羣組名;
* @param triggerName 觸發器名;
* @param triggerGroupName 觸發器羣組名;
* @throws SchedulerException
*/
public void removeJob(String jobName, String jobGroupName, String triggerName, String triggerGroupName) throws SchedulerException;
/**
* 啓動所有定時任務;
* @throws SchedulerException
*/
public void startAllJobs() throws SchedulerException;
/**
* 關閉所有定時任務;
* @throws SchedulerException
*/
public void shutdownAllJobs() throws SchedulerException;
/**
* 暫停指定任務;
*
* @param jobName 任務名;
* @param jobGroupName 任務的羣組名;
* @throws SchedulerException
*/
public void pauseJob(String jobName, String jobGroupName) throws SchedulerException;
/**
* 恢復指定任務;
*
* @param jobName 任務名;
* @param jobGroupName 任務的羣組名;
* @throws SchedulerException
*/
public void resumeJob(String jobName, String jobGroupName) throws SchedulerException;
}
2. 實現對任務進行動態管理的接口方法:
package com.shawearn.quartz.util;
import java.text.ParseException;
import javax.annotation.Resource;
import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.springframework.stereotype.Service;
@Service("quartzUtil")
public class QuartzUtilImpl implements QuartzUtil {
@Resource
SchedulerFactory schedulerFactory;
@Override
public void addJob(String jobName, String jobGroupName, String triggerName,
String triggerGroupName, Class jobClass, String cronExpression) throws SchedulerException, ParseException {
// 獲得 Quartz 的調度器實例 scheduler;
Scheduler scheduler = schedulerFactory.getScheduler();
// 獲取 Quartz 任務類實例 jobDetail;
JobDetail jobDetail = new JobDetail(jobName, jobGroupName, jobClass);
// 獲取 Quartz 觸發器實例 trigger;
CronTrigger trigger = new CronTrigger(triggerName, triggerGroupName, cronExpression);
// 調度任務;
scheduler.scheduleJob(jobDetail, trigger);
// 如果調度器未被關閉,則啓動調度器;
if (!scheduler.isShutdown()) {
scheduler.start();
}
}
@Override
public void modifyJobTime(String jobName, String jobGroupName,
String triggerName, String triggerGroupName, String cronExpression) throws SchedulerException, ParseException {
// 獲得 Quartz 的調度器實例 scheduler;
Scheduler scheduler = schedulerFactory.getScheduler();
// 從調度器中獲取指定羣組的指定名稱的觸發器實例;
CronTrigger trigger = (CronTrigger) scheduler.getTrigger(triggerName, triggerGroupName);
// 對獲取的觸發器進行判空操作;
if (trigger == null) {
return;
}
String oldCronExpression = trigger.getCronExpression();
// 如果新的執行時間與舊的執行時間相同,則返回,不繼續下一步的操作;
if (oldCronExpression.equalsIgnoreCase(cronExpression)) {
return;
}
// 獲取任務信息;
JobDetail jobDetail = scheduler.getJobDetail(jobName, jobGroupName);
// 獲取到任務類;
Class jobClass = jobDetail.getJobClass();
// 移除舊的任務;
this.removeJob(jobName, jobGroupName, triggerName, triggerGroupName);
// 添加新任務;
this.addJob(jobName, jobGroupName, triggerName, triggerGroupName, jobClass, cronExpression);
}
@Override
public void removeJob(String jobName, String jobGroupName, String triggerName, String triggerGroupName) throws SchedulerException {
// 獲得 Quartz 的調度器實例 scheduler;
Scheduler scheduler = schedulerFactory.getScheduler();
// 暫停定時器;
scheduler.pauseTrigger(triggerName, triggerGroupName);
// 取消任務調度;
scheduler.unscheduleJob(jobName, jobGroupName);
// 刪除任務;
scheduler.deleteJob(jobName, jobGroupName);
}
@Override
public void startAllJobs() throws SchedulerException {
// 獲得 Quartz 的調度器實例 scheduler;
Scheduler scheduler = schedulerFactory.getScheduler();
// 如果調度器未被關閉,則啓動調度器;
if (!scheduler.isShutdown()) {
scheduler.start();
}
}
@Override
public void shutdownAllJobs() throws SchedulerException {
// 獲得 Quartz 的調度器實例 scheduler;
Scheduler scheduler = schedulerFactory.getScheduler();
// 如果調度器未被關閉,關閉調度器;
if (!scheduler.isShutdown()) {
scheduler.shutdown();
}
}
@Override
public void pauseJob(String jobName, String jobGroupName) throws SchedulerException {
// 獲得 Quartz 的調度器實例 scheduler;
Scheduler scheduler = schedulerFactory.getScheduler();
// 暫停調度器中的指定任務;
scheduler.pauseJob(jobName, jobGroupName);
}
@Override
public void resumeJob(String jobName, String jobGroupName) throws SchedulerException {
// 獲得 Quartz 的調度器實例 scheduler;
Scheduler scheduler = schedulerFactory.getScheduler();
// 恢復調度器中的指定任務;
scheduler.resumeJob(jobName, jobGroupName);
}
}
3. 實現作業類,作業類需要實現 org.quartz.Job 類,處於篇幅考慮,此處只貼出 MyJob1 類的代碼,其他作業類與 MyJob1 類似;
package com.shawearn.quartz.util;
import java.util.Date;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;
/**
* 作業類;
*
* @author Shawearn
*
*/
public class MyJob1 implements Job {
@Override
public void execute(JobExecutionContext context) throws JobExecutionException {
// 在此處定義任務所要執行的操作,本例中爲在控制檯輸出一串字符串;
System.out.println("MyJob1.execute() : " + new Date());
}
}
4. JUnit 測試類
package com.shawearn.test;
import java.text.ParseException;
import org.junit.BeforeClass;
import org.junit.Test;
import org.quartz.SchedulerException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.shawearn.quartz.util.MyJob1;
import com.shawearn.quartz.util.MyJob2;
import com.shawearn.quartz.util.MyJob3;
import com.shawearn.quartz.util.QuartzUtil;
public class TestService {
public static BeanFactory beanFactory = null;
public static QuartzUtil quartzUtil = null;
@BeforeClass
public static void init() {
beanFactory = new ClassPathXmlApplicationContext("applicationContext.xml");
quartzUtil = (QuartzUtil) beanFactory.getBean("quartzUtil");
}
@Test
public void test() {
String jobName1 = "MyJob1";
String jobName2 = "MyJob2";
String jobName3 = "MyJob3";
try {
System.out.println("開啓定時任務 " + jobName1 + ",每秒執行一次!");
quartzUtil.addJob(jobName1, "1", "1", "1", MyJob1.class, "0/1 * * * * ?");
Thread.sleep(5000);
System.out.println("修改定時任務 " + jobName1 + ",每兩秒執行一次!");
quartzUtil.modifyJobTime(jobName1, "1", "1", "1", "0/2 * * * * ?");
Thread.sleep(5000);
System.out.println("開啓定時任務 MyJob2,每秒執行一次!");
quartzUtil.addJob(jobName2, "1", "2", "1", MyJob2.class, "0/1 * * * * ?");
Thread.sleep(5000);
System.out.println("移除定時任務 " + jobName1);
quartzUtil.removeJob(jobName1, "1", "1", "1");
Thread.sleep(5000);
System.out.println("開啓定時任務 MyJob3,每三秒執行一次!");
quartzUtil.addJob(jobName3, "1", "3", "1", MyJob3.class, "0/3 * * * * ?");
Thread.sleep(5000);
Thread.sleep(1000000000);
} catch (SchedulerException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}