QUARZ—-简单入门DEMO（二）

<!– quartz –>
<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>
步骤一：
public class RAMJob implements Job{
@Override public void execute(JobExecutionContext arg0) throws JobExecutionException { 
//这里是你要执行什么，关键代码，如订单取消订单
_log.info(“Say hello to Quartz” + new Date()); 
}

步骤二：

public class RAMQuartz {
    private static Logger _log = LoggerFactory.getLogger(RAMQuartz.class);
    public static void main(String[] args) throws SchedulerException {
        //1.创建Scheduler的工厂
        SchedulerFactory sf = new StdSchedulerFactory();
        //2.从工厂中获取调度器实例
        Scheduler scheduler = sf.getScheduler();
        //3.创建JobDetail
        JobDetail JobDetail = JobBuilder.newJob(RAMJob.class)
                .withDescription(“this is a ram job”) //job的描述  
                .withIdentity(“ramJob”, “ramGroup”) //job 的name和group
                .build();

说明：

<!– 指定job的名称 –> 
<property name=“name” value=“hw_job”/> 
<!– 指定job的分组 –> 
<property name=“group” value=“hw_group”/>
        //任务运行的时间，SimpleSchedle类型触发器有效
        long time=  System.currentTimeMillis() + 3*1000L; //3秒后启动任务
        Date statTime = new Date(time);
        //4.创建Trigger
            //使用SimpleScheduleBuilder或者CronScheduleBuilder
        Trigger trigger = TriggerBuilder.newTrigger()
                    .withDescription(“”)
                    .withIdentity(“ramTrigger”, “ramTriggerGroup”)
                    //.withSchedule(SimpleScheduleBuilder.simpleSchedule())
                    .startAt(statTime)  //默认当前时间启动
                    .withSchedule(CronScheduleBuilder.cronSchedule(“0/2 * * * * ?”)) //两秒执行一次
                    .withSchedule(这里是触发器类型);
                    .build();
        //5.注册任务和定时器
        scheduler.scheduleJob(JobDetail, trigger);
        //6.启动 调度器
        scheduler.start();
        _log.info(“启动时间 ： ” + new Date());
    }
}