使用quartz完成可动态修改时间的定点任务

1、xml文件的配置

 <span style="white-space:pre">	</span><bean class="org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor"/>
    <context:component-scan base-package="com.car.service">
		<context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/>
	</context:component-scan>
	<bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean">  
       <property name="triggers">  
           <list>  
              <ref bean="testTrigger"/>  
           </list>  
       </property>  
       <property name="autoStartup" value="true"/>  
	</bean>
	<bean id="testTrigger" class="org.springframework.scheduling.quartz.CronTriggerFactoryBean">  
       <property name="jobDetail" ref="testJobDetail"/>  
       <!-- 10 seconds -->
	    <property name="startDelay" value="10000" />
	    <!-- 刚开始设置成了5秒执行一次，根据自己的项目需求，可以先定义成每天定时执行 -->
	    <property name="cronExpression" value="0/5 * * * * ?" />
	</bean> 
	<bean id="testJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">  
         <property name="targetObject" ref="testJob"/>  
         <property name="targetMethod" value="execute"/>  
         <property name="concurrent" value="false"/>  
	</bean>
<span style="white-space:pre">	</span><bean id="testJob" class="com.TestJob"/>

2、TestJob里面存放的是定时执行的任务

public class TestJob{
	public void execute(){
		// TODO Auto-generated method stub
		System.out.println("执行任务 ，当前执行时间 :: " + (new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss")).format(new Date()));
		
	}
}

3、具体实现方法

定时任务表达式参考：http://www.blogjava.net/xmatthew/archive/2009/02/15/253864.html

public void retScheduleJob(String str) throws SchedulerException, ParseException {
		TriggerBuilder<CronTrigger> tb = newTrigger.getObject()
				.getTriggerBuilder();
		// 表达式调度构建器
		CronScheduleBuilder scheduleBuilder = CronScheduleBuilder
				.cronSchedule(str);//此处字符串就是前台传过来的定时执行的时间!!
	
		// 按新的cronExpression表达式重新构建trigger
		Trigger trigger = newTrigger.getObject().getTriggerBuilder()
				.withIdentity(newTrigger.getObject().getKey())
				.withSchedule(scheduleBuilder).build();
		
		System.out.println("动态改变执行时间为："+str);
		myScheduler.getObject().rescheduleJob(newTrigger.getObject().getKey(),
				trigger);
	}