Example tutorial for configuring web.xml

Today on the project, you need to do a timing task. If you learn temporarily, the function of Quartz is still very convenient to use. The DEMO here is only implemented once a day. Other functions can continue to study on this basis. Haha sleeps on this. Haha sleeps. , continue tomorrow.

I have always had the idea to record, organize and share what I have learned. I have never done it. Today I will start the first article. This is a scheduled task that needs to be done on today’s project. I learned it temporarily. The function of quartz is still It is very powerful and easy to use. The demo here only implements scheduled execution once a day. Other functions can be further studied on this basis. Haha, sleep and continue tomorrow.

1. Maven dependency:

<dependency><groupId>org.quartz-scheduler</groupId><artifactId>quartz</artifactId><version>2.2.3</version>
  </dependency>
  <dependency><groupId>org.quartz-scheduler</groupId><artifactId>quartz-jobs</artifactId><version>2.2.3</version>
  </dependency>

2. Doem:

TimingTaskSchedule needs to implement the ServletContextListener interface to start the project after listening Class

package com.thinkgem.jeesite.modules.sys.listener;import javax.servlet.ServletContextEvent;import javax.servlet.ServletContextListener;public class TimingTaskSchedule implements ServletContextListener{// 服务器启动时执行该事件    @Overridepublic void contextInitialized(ServletContextEvent arg0) {try {
            QuartzLoad.run();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }// 服务器停止时执行该事件    @Overridepublic void contextDestroyed(ServletContextEvent arg0) {try {
            QuartzLoad.stop();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

The 0 0 0 ? * * means execution once every day at 00:00:00

represents seconds from left to right Time-sharing day-month anniversary

? Indicates that you don’t care* means you can ignore it and don’t write it every year

package com.thinkgem.jeesite.modules.sys.listener;import org.quartz.CronScheduleBuilder;import org.quartz.CronTrigger;import org.quartz.Job;import org.quartz.JobBuilder;import org.quartz.JobDetail;import org.quartz.Scheduler;import org.quartz.SchedulerFactory;import org.quartz.TriggerBuilder;import org.quartz.impl.StdSchedulerFactory;import com.thinkgem.jeesite.modules.sys.listener.job;public class QuartzLoad {private static Scheduler sched; public static void run() throws Exception { 
        System.out.println("定时任务启动");
        JobDetail jobDetail = JobBuilder.newJob((Class<? extends Job>) job.class)
                .withIdentity("myjob", "group1").build();CronTrigger trigger =(CronTrigger) TriggerBuilder.newTrigger()
                .withIdentity("trigger", "group1")
                .withSchedule(CronScheduleBuilder.cronSchedule("0 0 0 ? * *"))
                .build();
        SchedulerFactory sfact = new StdSchedulerFactory();
        Scheduler schedule = sfact.getScheduler();
        schedule.start();
        schedule.scheduleJob(jobDetail, trigger);
    }//停止  public static void stop() throws Exception{  
           sched.shutdown();  
     }  
}

Job is your own business processing

  job   execute(JobExecutionContext arg0) ==  SimpleDateFormat("yyyy-MM-dd HH:mm:ss""Time:"+"Hello"

三, web.xml listening:

com.thinkgem.jeesite.modules.sys.listener.TimingTaskSchedule

<listener>
<listener-class>com.thinkgem.jeesite.modules.sys.listener.TimingTaskSchedule
</listener-class>
</listener>

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