quartz定时任务-job

1,首先添加对quartz组建的引用 quartz-2.2.3.jar,slf4j-api-1.7.7.jar

https://files.cnblogs.com/files/renjing/quartz.zip

2,新增类实现job接口

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.quartz.Job;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

public class TestJob implements Job {

    private static final Logger logger = LogManager.getLogger(TestJob.class);
    
    @Override
    public void execute(JobExecutionContext arg0) throws JobExecutionException {
        logger.debug("TestJob执行啦！");
    }
}

3.新增一个Servlet,并且设置为在网站启动的时候自动初始化

import java.util.TimeZone;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.quartz.CronScheduleBuilder;
import org.quartz.CronTrigger;
import org.quartz.JobBuilder;
import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.TriggerBuilder;
import org.quartz.impl.StdSchedulerFactory;

//loadOnStartup表示：网站启动的时候自动初始化QuartzInitServlet（即init被调用）
@WebServlet(value = "/QuartzInitServlet", loadOnStartup = 1)
public class QuartzInitServlet extends HttpServlet {
    
    private static final Logger logger = LogManager.getLogger(QuartzInitServlet.class);
    @Override
    public void init() throws ServletException {
        super.init();
        
        try
        {
            Scheduler scheduler = StdSchedulerFactory.getDefaultScheduler();
            JobDetail job = JobBuilder.newJob(TestJob.class).build();
            CronScheduleBuilder cronScheduleBuilder = 
                    CronScheduleBuilder.cronSchedule("0 0 0/1 * * ? ").inTimeZone(TimeZone.getTimeZone("GMT+08:00"));//每小时执行一次
                    //CronScheduleBuilder.cronSchedule("10/5 * * * * ? ").inTimeZone(TimeZone.getTimeZone("GMT+08:00"));//从10秒开始，每隔5秒执行一次
                    //CronScheduleBuilder.cronSchedule("45 53 23 * * ? ").inTimeZone(TimeZone.getTimeZone("GMT+08:00"));//每天23:53:45
                    //CronScheduleBuilder.dailyAtHourAndMinute(23, 48).inTimeZone(TimeZone.getTimeZone("GMT+08:00"));
            CronTrigger trigger = TriggerBuilder.newTrigger().withSchedule(cronScheduleBuilder).build();
            scheduler.scheduleJob(job, trigger);
            scheduler.start();//不要忘了启动
        }
        catch(Throwable ex)
        {
            logger.error("定时任务安排出错",ex);
        }
    }
}