quartz定时:修改时间及时生效的定时任务

Quartz 1.x的用法如下，下方有2.x的大致用法，使用quartz定时任务在服务重启后会失效，如果想要任务不消失的定时任务，参照我的另一篇博客 ：spring定时:动态设置定时任务 。

maven配置如下：

        UTF-8
        3.0.7.RELEASE
        1.8.6
    
  
    
      junit
      junit
      3.8.1
      test
    
    
            org.springframework
            spring-context
            ${spring.version}
            
                
                
                    commons-logging
                    commons-logging
                
            
        

        
            org.springframework
            spring-context-support
            ${spring.version}
        
        
            org.springframework
            spring-webmvc
            ${spring.version}
        
        
            org.springframework
            spring-orm
            ${spring.version}
            jar
            compile
        

        
            org.springframework
            spring-test
            ${spring.version}
            jar
            test
        
		
		
            org.quartz-scheduler
            quartz
            ${quartz.version}
        
		
  

springContext.xml配置

创建QuartzManager.java类

package com.ld.nhmz.quartz;

import org.quartz.CronTrigger;
import org.quartz.JobDetail;
import org.quartz.Scheduler;

/**
 * Quartz调度管理器
 */
public class QuartzManager {
    private static String JOB_GROUP_NAME = "EXTJWEB_JOBGROUP_NAME";
    private static String TRIGGER_GROUP_NAME = "EXTJWEB_TRIGGERGROUP_NAME";

    /**
     * @Description: 添加一个定时任务，使用默认的任务组名，触发器名，触发器组名
     */
    public static void addJob(Scheduler sched, String jobName, @SuppressWarnings("rawtypes") Class cls, String time) {
        try {
            JobDetail jobDetail = new JobDetail(jobName, JOB_GROUP_NAME, cls);// 任务名，任务组，任务执行类
            // 触发器
            CronTrigger trigger = new CronTrigger(jobName, TRIGGER_GROUP_NAME);// 触发器名,触发器组
            trigger.setCronExpression(time);// 触发器时间设定
            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(使用默认的任务组名，触发器名，触发器组名)
     */
    @SuppressWarnings("rawtypes")
    public static void modifyJobTime(Scheduler sched, String jobName, String time) {
        try {
            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(sched, jobName);
                addJob(sched, jobName, objJobClass, time);
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * @Description: 移除一个任务(使用默认的任务组名，触发器名，触发器组名)
     */
    public static void removeJob(Scheduler sched, String jobName) {
        try {
            sched.pauseTrigger(jobName, TRIGGER_GROUP_NAME);// 停止触发器
            sched.unscheduleJob(jobName, TRIGGER_GROUP_NAME);// 移除触发器
            sched.deleteJob(jobName, JOB_GROUP_NAME);// 删除任务
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * @Description:启动所有定时任务
     */
    public static void startJobs(Scheduler sched) {
        try {
            sched.start();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    /**
     * @Description:关闭所有定时任务
     */
    public static void shutdownJobs(Scheduler sched) {
        try {
            if (!sched.isShutdown()) {
                sched.shutdown();
            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}

创建自己的任务，例如我这里是用QuartzJobExample.java类

public class QuartzJobExample implements Job {
    public void execute(JobExecutionContext arg0) throws JobExecutionException {
        System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()) + "+++++++++++++");
    }
}

这样就可以动态的添加，删除，修改定时时间。

下面是2.x的使用方法

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);  
        }  
    }  
}

如果想传递参数，那么在QuartzManager.java中对JobDetail进行

jobDetail.getJobDataMap().put("txt",txt);

在自己的Job中get即可得到传递的参数。

public class QuartzJobExample implements Job {
    public void execute(JobExecutionContext arg0) throws JobExecutionException {
        String txt = arg0.getJobDetail().getJobDataMap().getString("txt");
    }
}