quartz两种方式实现定时器

导入jar包，其他项目依赖的jar包自行导入

<dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz</artifactId>
    <version>2.2.1</version>
    </dependency>
    <dependency>
    <groupId>org.quartz-scheduler</groupId>
    <artifactId>quartz-jobs</artifactId>
    <version>2.2.1</version>
    </dependency>

1代码实现：
QuartzArt类

public class QuartzArt implements Job {
  @Override
  public void execute(JobExecutionContext jobExecutionContext) throws JobExecutionException {
      System.out.println(new Date() + ": job 1 doing something...");
  }
}

QuartzManager类（两种方法搜需要这个类进行管理）

public class QuartzManager {
    private Scheduler scheduler;

    /**
     * @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 void addJob(String jobName, String jobGroupName,
                       String triggerName, String triggerGroupName, Class jobClass, String cron) {
        try {
            // 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
            scheduler.scheduleJob(jobDetail, trigger);

            // 启动
            if (!scheduler.isShutdown()) {
                scheduler.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 void modifyJobTime(String jobName,
                              String jobGroupName, String triggerName, String triggerGroupName, String cron) {
        try {
            TriggerKey triggerKey = TriggerKey.triggerKey(triggerName, triggerGroupName);
            CronTrigger trigger = (CronTrigger) scheduler.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
                scheduler.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 = scheduler.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 void removeJob(String jobName, String jobGroupName,
                          String triggerName, String triggerGroupName) {
        try {
            TriggerKey triggerKey = TriggerKey.triggerKey(triggerName, triggerGroupName);

            scheduler.pauseTrigger(triggerKey);// 停止触发器
            scheduler.unscheduleJob(triggerKey);// 移除触发器
            scheduler.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 void startJobs() {
        try {
            scheduler.start();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

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

    public Scheduler getScheduler() {
        return scheduler;
    }

    public void setScheduler(Scheduler scheduler) {
        this.scheduler = scheduler;
    }
}

测试类：Test.java

public static void main(String[] args) throws BeansException {
        QuartzManager quartzManager = (QuartzManager) ctx.getBean("quartzManager");
        try {  
            System.out.println("【系统启动】开始(每1秒输出一次 job2)...");      
            quartzManager.addJob("test", "test", "test", "test", MyJob.class, "0/1 * * * * ?");    

            Thread.sleep(5000);    
            System.out.println("【修改job1时间】开始(每2秒输出一次)...");    
            quartzManager.modifyJobTime("test", "test", "test", "test", "0/2 * * * * ?");    

            Thread.sleep(10000);    
            System.out.println("【移除job1定时】开始...");    
            quartzManager.removeJob("test", "test", "test", "test");    

            // 关掉任务调度容器
            // quartzManager.shutdownJobs();
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
    }

2配置文件实现：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd"
       default-lazy-init="true">

    <!-- 这个类用来做需要完成的业务-->
    <bean id="QuartzJob2" class="com.haiziyouke.service.utils.QuartzJob2"></bean>

    <!-- 定时任务 -->
    <!-- 定义调用对象和调用对象的方法，这个配置和普通的一样的,id是JobDetail的名字  -->
    <bean id="jobtask" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <!-- 调用的类  -->
        <property name="targetObject" ref="QuartzJob2" />
        <!-- 调用类中的方法  -->
        <property name="targetMethod" value="doSomething" />
        <!-- 是否并发  -->
        <property name ="concurrent" value ="false"  />
    </bean>

    <!-- 定义触发时间 ，这边就不同了，这里必须将时间设置成无限长，因为我们要去读取数据库的时间来做为定时器的触发时间-->
    <bean id="cronTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean ">
        <property name="jobDetail" ref="jobtask" />
        <!-- cron表达式  -->

        <property name="cronExpression" value="0/5 * * * * ?" />
        <!--<property name="cronExpression" value="0 0 6 * * ?" />-->
    </bean>

    <!-- 总管理类 如果将lazy-init='false'那么容器启动就会执行调度程序  -->
    <bean id="startQuertz" lazy-init="true" autowire="no" class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
        <property name="triggers">
            <list>
                <ref bean="cronTrigger" />
            </list>
        </property>
    </bean>

    <!--这个类是用来设置触发时间的， startJobs方法启动调度容器，然后按照上面触发器每隔1s执行所配置的myJob2.doSomething()方法 -->
    <bean id="quartzManager" class="com.haiziyouke.service.utils.QuartzManager" lazy-init="false" init-method="startJobs" >
        <!--这个对象一定要注入，这样类才能进行管理，还有在类型要用get set方法，不然会报错。-->
        <property name="scheduler" ref="startQuertz" />
    </bean>
</beans>

业务类：QuartzJob2 (这个类可以是你项目中的任何一个类，只要在XML配置下就好)

public class QuartzJob2 {
    public void doSomething(){
        System.out.println(new Date() + ": job 2 doing something...");
    }
}

测试类：Test2.java

public class QuartzTest {
    public static void main(String[] args) throws BeansException {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("quartz-config.xml");
        //QuartzManager quartzManager = (QuartzManager) ctx.getBean("quartzManager");
        try {

            System.out.println(new Date() + ": job 1 doing something...");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}