下面直接上程式碼：
QuartzManager.java 動態新增、修改和刪除定時任務管理類

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: 新增一個定時任務 
     *  
     * @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 cron   時間設定，參考quartz說明文件  
     */  
    @SuppressWarnings({ "unchecked", "rawtypes" })  
    public static void addJob(String jobName, String jobGroupName, 
            String triggerName, String triggerGroupName, Class jobClass, String cron) {  
        try
 
 {  
            Scheduler sched = schedulerFactory.getScheduler();  
            // 任務名，任務組，任務執行類
            JobDetail jobDetail= JobBuilder.newJob(jobClass).withIdentity(jobName, jobGroupName).build();

            // 觸發器  
            TriggerBuilder<Trigger> triggerBuilder = TriggerBuilder.newTrigger();
            // 觸發器名,觸發器組  
            triggerBuilder.withIdentity(triggerName, triggerGroupName);
            triggerBuilder.startNow();
            // 觸發器時間設定  
            triggerBuilder.withSchedule(CronScheduleBuilder.cronSchedule(cron));
            // 建立Trigger物件
            CronTrigger trigger = (CronTrigger) triggerBuilder.build();

            // 排程容器設定JobDetail和Trigger
            sched.scheduleJob(jobDetail, trigger);  

            // 啟動  
            if (!sched.isShutdown()) {  
                sched.start();  
            }  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        }  
    }  

    /** 
     * @Description: 修改一個任務的觸發時間
     *  
     * @param jobName 
     * @param jobGroupName
     * @param triggerName 觸發器名
     * @param triggerGroupName 觸發器組名 
     * @param cron   時間設定，參考quartz說明文件   
     */  
    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 ：呼叫 rescheduleJob 開始 */
                // 觸發器  
                TriggerBuilder<Trigger> triggerBuilder = TriggerBuilder.newTrigger();
                // 觸發器名,觸發器組  
                triggerBuilder.withIdentity(triggerName, triggerGroupName);
                triggerBuilder.startNow();
                // 觸發器時間設定  
                triggerBuilder.withSchedule(CronScheduleBuilder.cronSchedule(cron));
                // 建立Trigger物件
                trigger = (CronTrigger) triggerBuilder.build();
                // 方式一 ：修改一個任務的觸發時間
                sched.rescheduleJob(triggerKey, trigger);
                /** 方式一 ：呼叫 rescheduleJob 結束 */

                /** 方式二：先刪除，然後在建立一個新的Job  */
                //JobDetail jobDetail = sched.getJobDetail(JobKey.jobKey(jobName, jobGroupName));  
                //Class<? extends Job> jobClass = jobDetail.getJobClass();  
                //removeJob(jobName, jobGroupName, triggerName, triggerGroupName);  
                //addJob(jobName, jobGroupName, triggerName, triggerGroupName, jobClass, cron); 
                /** 方式二 ：先刪除，然後在建立一個新的Job */
            }  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        }  
    }  

    /** 
     * @Description: 移除一個任務 
     *  
     * @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);// 停止觸發器  
            sched.unscheduleJob(triggerKey);// 移除觸發器  
            sched.deleteJob(JobKey.jobKey(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 = schedulerFactory.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 = schedulerFactory.getScheduler();  
            if (!sched.isShutdown()) {  
                sched.shutdown();  
            }  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        }  
    }  
}

MyJob.java 任務類

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...");
    }
}

Test.Java 測試類

public class Test {

    public static String JOB_NAME = "動態任務排程";  
    public static String TRIGGER_NAME = "動態任務觸發器";  
    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("【系統啟動】開始(每1秒輸出一次)...");    
            QuartzManager.addJob(JOB_NAME, JOB_GROUP_NAME, TRIGGER_NAME, TRIGGER_GROUP_NAME, MyJob.class, "0/1 * * * * ?");    

            Thread.sleep(5000);    
            System.out.println("【修改時間】開始(每5秒輸出一次)...");    
            QuartzManager.modifyJobTime(JOB_NAME, JOB_GROUP_NAME, TRIGGER_NAME, TRIGGER_GROUP_NAME, "0/5 * * * * ?");    

            Thread.sleep(6000);    
            System.out.println("【移除定時】開始...");    
            QuartzManager.removeJob(JOB_NAME, JOB_GROUP_NAME, TRIGGER_NAME, TRIGGER_GROUP_NAME);    
            System.out.println("【移除定時】成功");    
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }
}