Quartz做定时任务，如何能达到手动控制这个任务的执行与终止？

实现思路:
1.Quartz的JobDetail可以是无状态的，也可以是有状态的。Trigger无状态的，所以只能使用JobDetail有状态的子接口StatefulJob.Job代码如下:

package test.quartz.spring;  
  
import java.util.Date;  
  
import org.quartz.Job;  
import org.quartz.JobDataMap;  
import org.quartz.JobExecutionContext;  
import org.quartz.JobExecutionException;  
import org.quartz.StatefulJob;  
  
public class TJob implements StatefulJob {  
  
    /** 
     * 不用挣扎了，Quartz都是无状态的，他不知道执行了几次。 
     * 如果想要记录状态就需要持久化到数据库. 
     */  
    public void execute(JobExecutionContext cntxt) throws JobExecutionException {  
           
        JobDataMap jobDataMap = cntxt.getJobDetail().getJobDataMap();  
        Integer count = (Integer) jobDataMap.get("count");  
        if(count==null){  
            count=0;  
        }  
        count++;  
         System.out.println("杨春龙,太帅了");  
         System.out.println("不是我说的");  
         System.out.println( " Generating report -  "  
                +  count  
                +  "-"  
                +   new  Date());  
         jobDataMap.put("count", count);  
         cntxt.getJobDetail().setJobDataMap(jobDataMap);  
           
  
    }  
  
}  

根据ApI描述，如果是有状态的Job，所有的Job都共享jobDataMap,所有把执行次数记录下来.虽然我记录了执行次数，但是因为Job是一个Thread，由ThreadPool来维持,那么如何监视Job的执行情况，在看源码中，发现有一个Listener，可以监听进程的执行，代码如下:

package test.quartz.spring;  
  
import org.quartz.CronTrigger;  
import org.quartz.JobExecutionContext;  
import org.quartz.SchedulerException;  
import org.quartz.Trigger;  
import org.quartz.listeners.TriggerListenerSupport;  
  
public class TriggerListener extends TriggerListenerSupport {  
      
    private String name;    
      
    private Integer count;   
    public void setName(String name)     
    {     
        this.name=name;     
    }     
      
    public String getName() {  
        // TODO Auto-generated method stub  
        return this.name;  
    }  
      
  
    public Integer getCount() {  
        return count;  
    }  
  
    public void setCount(Integer count) {  
        this.count = count;  
    }  
  
    @Override  
    public void triggerComplete(Trigger trigger, JobExecutionContext context,  
            int triggerInstructionCode) {  
        System.out.println("Trigger :"+trigger.getGroup()+"."+trigger.getName()+" completed with code:"+triggerInstructionCode);  
        Integer current = (Integer) context.getJobDetail().getJobDataMap().get("count");  
        System.out.println("调用次数:"+current);    
        if(current == count){  
            try {  
                context.getScheduler().shutdown();  
            } catch (SchedulerException e) {  
                // TODO Auto-generated catch block  
                e.printStackTrace();  
            }  
        }  
        super.triggerComplete(trigger, context, triggerInstructionCode);  
    }  
  
      
  
}  

在Job的执行中设置执行次数，在监听器中得到执行次数，当执行次数到达count的时候退出执行.
JobQuartz.xml配置如下

<?xml version="1.0" encoding="UTF-8"?>  
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">  
  
<beans>  
<!--要调度的对象-->  
  
    <bean id="job" class="test.quartz.spring.TJob"></bean>  
    <bean id="triggerListener" class="test.quartz.spring.TriggerListener">  
        <property name="name">  
            <value>triggerListener</value>  
        </property>  
        <property name="count">  
            <value>3</value>  
        </property>   
    </bean>  
<!-- 定义目标bean和bean中的方法 -->  
    <bean id="jobtask" class="org.springframework.scheduling.quartz.JobDetailBean">  
        <property name="jobClass">  
            <value>test.quartz.spring.TJob</value>  
        </property>  
  
    </bean>  
<!-- 定义触发的时间 -->  
    <bean id = "cron" class = "org.springframework.scheduling.quartz.CronTriggerBean">  
        <!-- jobDetail中的name,group都已经设置 -->  
        <property name="jobDetail">  
            <ref bean="jobtask"/>  
        </property>  
        <property name="triggerListenerNames">    
            <list>    
               <value>triggerListener</value>    
            </list>    
        </property>     
        <property name="cronExpression">  
            <value>0/10 * * * * ?</value>  
        </property>   
    </bean>  
<!-- 总管理 -->  
    <bean autowire = "no" class = "org.springframework.scheduling.quartz.SchedulerFactoryBean">  
        <property name="triggers">  
            <list>  
                <ref local ="cron"/>  
            </list>  
        </property>  
        <!-- 添加监听器 -->  
        <property name="triggerListeners">    
            <list>    
                <ref bean="triggerListener"/>   
            </list>    
        </property>    
          
    </bean>  
  
</beans>  

在SchedulerFactoryBean中配置监听器列表，在CronTriggerBean配置监听器名称，这样这个监听器就可以监听这个Trigger了，当执行了3次后自动退出
测试代码如下:

package test.quartz.spring;  
  
import org.springframework.context.ApplicationContext;  
import org.springframework.context.support.ClassPathXmlApplicationContext;  
  
public class TestSpring {  
  
    /** 
     * @param args 
     */  
    public static void main(String[] args) {  
        System.out.println("测试开始");  
        ApplicationContext ctx = new ClassPathXmlApplicationContext("JobQuartz.xml");  
        System.out.println("测试结束");  
  
    }  
  
}  

测试输出如下:
测试开始

Java代码  收藏代码
2010-09-27 09:33:39,640 INFO [org.springframework.context.support.ClassPathXmlApplicationContext] - <Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@3e86d0: display name [org.springframework.context.support.ClassPathXmlApplicationContext@3e86d0]; startup date [Mon Sep 27 09:33:39 CST 2010]; root of context hierarchy>  
2010-09-27 09:33:39,718 INFO [org.springframework.beans.factory.xml.XmlBeanDefinitionReader] - <Loading XML bean definitions from class path resource [JobQuartz.xml]>  
2010-09-27 09:33:39,781 INFO [org.springframework.context.support.ClassPathXmlApplicationContext] - <Bean factory for application context [org.springframework.context.support.ClassPathXmlApplicationContext@3e86d0]: org.springframework.beans.factory.support.DefaultListableBeanFactory@197a37c>  
2010-09-27 09:33:39,812 INFO [org.springframework.beans.factory.support.DefaultListableBeanFactory] - <Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@197a37c: defining beans [job,triggerListener,jobtask,cron,org.springframework.scheduling.quartz.SchedulerFactoryBean#0]; root of factory hierarchy>  
2010-09-27 09:33:39,953 INFO [org.quartz.core.SchedulerSignalerImpl] - <Initialized Scheduler Signaller of type: class org.quartz.core.SchedulerSignalerImpl>  
2010-09-27 09:33:39,953 INFO [org.quartz.core.QuartzScheduler] - <Quartz Scheduler v.1.8.3 created.>  
2010-09-27 09:33:39,953 INFO [org.quartz.simpl.RAMJobStore] - <RAMJobStore initialized.>  
2010-09-27 09:33:39,953 INFO [org.quartz.core.QuartzScheduler] - <Scheduler meta-data: Quartz Scheduler (v1.8.3) 'org.springframework.scheduling.quartz.SchedulerFactoryBean#0' with instanceId 'NON_CLUSTERED'  
  Scheduler class: 'org.quartz.core.QuartzScheduler' - running locally.  
  NOT STARTED.  
  Currently in standby mode.  
  Number of jobs executed: 0  
  Using thread pool 'org.quartz.simpl.SimpleThreadPool' - with 10 threads.  
  Using job-store 'org.quartz.simpl.RAMJobStore' - which does not support persistence. and is not clustered.  
>  
2010-09-27 09:33:39,953 INFO [org.quartz.impl.StdSchedulerFactory] - <Quartz scheduler 'org.springframework.scheduling.quartz.SchedulerFactoryBean#0' initialized from an externally provided properties instance.>  
2010-09-27 09:33:39,953 INFO [org.quartz.impl.StdSchedulerFactory] - <Quartz scheduler version: 1.8.3>  
2010-09-27 09:33:39,953 INFO [org.quartz.core.QuartzScheduler] - <JobFactory set to: org.springframework.scheduling.quartz.AdaptableJobFactory@1b09468>  
2010-09-27 09:33:39,953 INFO [org.springframework.scheduling.quartz.SchedulerFactoryBean] - <Starting Quartz Scheduler now>  
2010-09-27 09:33:39,953 INFO [org.quartz.core.QuartzScheduler] - <Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED started.>  
测试结束  
杨春龙,太帅了  
不是我说的  
 Generating report -  1-Mon Sep 27 09:33:40 CST 2010  
Trigger :DEFAULT.cron completed with code:0  
调用次数:1  
杨春龙,太帅了  
不是我说的  
 Generating report -  2-Mon Sep 27 09:33:50 CST 2010  
Trigger :DEFAULT.cron completed with code:0  
调用次数:2  
杨春龙,太帅了  
不是我说的  
 Generating report -  3-Mon Sep 27 09:34:00 CST 2010  
Trigger :DEFAULT.cron completed with code:0  
调用次数:3  
2010-09-27 09:34:00,000 INFO [org.quartz.core.QuartzScheduler] - <Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED shutting down.>  
2010-09-27 09:34:00,000 INFO [org.quartz.core.QuartzScheduler] - <Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED paused.>  
2010-09-27 09:34:00,000 INFO [org.quartz.core.QuartzScheduler] - <Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED shutdown complete.>