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整理文檔，java 動態增加定時任務示例，直接上代碼。
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: 定時任務管理類
* 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: 添加一個定時任務，使用默認的任務組名，觸發器名，觸發器組名
*
* @param jobName
* 任務名
* @param cls
* 任務
* @param time
* 時間設置，參考quartz說明文檔
*
* @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);// 任務名，任務組，任務執行類
jobDetail.getJobDataMap().put("params", params);
// 觸發器
CronTrigger trigger = new CronTrigger(jobName, TRIGGER_GROUP_NAME);// 觸發器名,觸發器組
trigger.setCronExpression(time);// 觸發器時間設定
sched.scheduleJob(jobDetail, trigger);
// 啟動
if (!sched.isShutdown()) {
sched.start();
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description: 添加一個定時任務
*
* @param jobName
* 任務名
* @param jobGroupName
* 任務組名
* @param triggerName
* 觸發器名
* @param triggerGroupName
* 觸發器組名
* @param jobClass
* 任務
* @param time
* 時間設置，參考quartz說明文檔
*
*/
@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);// 任務名，任務組，任務執行類
jobDetail.getJobDataMap().put("params",params);
// 觸發器
CronTrigger trigger = new CronTrigger(triggerName, triggerGroupName);// 觸發器名,觸發器組
trigger.setCronExpression(time);// 觸發器時間設定
sched.scheduleJob(jobDetail, trigger);
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description: 修改一個任務的觸發時間(使用默認的任務組名，觸發器名，觸發器組名)
*
* @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: 修改一個任務的觸發時間
*
*/
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;
// 修改時間
ct.setCronExpression(time);
// 重啟觸發器
sched.resumeTrigger(triggerName, triggerGroupName);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description: 移除一個任務(使用默認的任務組名，觸發器名，觸發器組名)
*
* @param jobName
*
*/
public static void removeJob(String jobName) {
try {
Scheduler sched = gSchedulerFactory.getScheduler();
sched.pauseTrigger(jobName, TRIGGER_GROUP_NAME);// 停止觸發器
sched.unscheduleJob(jobName, TRIGGER_GROUP_NAME);// 移除觸發器
sched.deleteJob(jobName, JOB_GROUP_NAME);// 刪除任務
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description: 移除一個任務
*
*/
public static void removeJob(String jobName, String jobGroupName,
String triggerName, String triggerGroupName) {
try {
Scheduler sched = gSchedulerFactory.getScheduler();
sched.pauseTrigger(triggerName, triggerGroupName);// 停止觸發器
sched.unscheduleJob(triggerName, triggerGroupName);// 移除觸發器
sched.deleteJob(jobName, jobGroupName);// 刪除任務
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description:啟動所有定時任務
*/
public static void startJobs() {
try {
Scheduler sched = gSchedulerFactory.getScheduler();
sched.start();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* @Description:關閉所有定時任務
*
*/
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;
}
}
測試類
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: 任務執行類
* 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("【移除定時】開始...");
QuartzManager.removeJob((String)params);
System.out.println("【移除定時】成功");
}
public static void main(String[] args) {
try {
String job_name = "動態任務調度";
System.out.println("【系統啟動】開始(每1秒輸出一次)...");
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("【修改時間】開始(每2秒輸出一次)...");
// QuartzManager.modifyJobTime(job_name, "10/2 * * * * ?");
// Thread.sleep(6000);
// System.out.println("【移除定時】開始...");
// QuartzManager.removeJob(job_name);
// System.out.println("【移除定時】成功");
//
// System.out.println("【再次添加定時任務】開始(每10秒輸出一次)...");
// QuartzManager.addJob(job_name, QuartzJob.class, "*/10 * * * * ?");
// Thread.sleep(60000);
// System.out.println("【移除定時】開始...");
// QuartzManager.removeJob(job_name);
// System.out.println("【移除定時】成功");
} catch (Exception e) {
e.printStackTrace();
}
}
}
不過最后發現，還是沒法做動態延遲。后面用延時mq實現的。
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持億速云。
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