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<Trigger> 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<Trigger> 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<? extends Job> 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);  
        }  
    }  
}

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...");
    }
}

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();  
        }  
    }
}