哪位大神能帮帮忙解决下quartz问题

Question

为啥**不用配置**JobDetailBean 可以使用quartz 网上好多quartz都要配置这东西，我的一个项目不用配置这东西，定时器照样使用，是默认调用吗？
配置文件
<bean name="quartzScheduler"
    class="org.springframework.scheduling.quartz.SchedulerFactoryBean">
    <property name="dataSource">
        <ref bean="dataSource" />
    </property>
    <property name="applicationContextSchedulerContextKey" value="applicationContextKey" />
    <property name="configLocation" value="classpath:/quartz/qz.properties" />
</bean> 

java类
public class DelaySendCouponJobBean extends QuartzJobBean {
private static final Logger logger = Logger.getLogger(DelaySendCouponJobBean.class);
public DelaySendCouponJobBean() {
    // TODO Auto-generated constructor stub
}

@Override
protected void executeInternal(JobExecutionContext jobexecutioncontext)
        throws JobExecutionException {
    // TODO Auto-generated method stub}}

    数据库
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