当tomcat启动时想调用某个类的某些方法

有些时候我们有这样的需求当tomcat启动时候或者关闭的时候我们想要调用某些方法。这个时候就可以这么做。直接贴代码

import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;

import org.quartz.SchedulerException;
import org.springframework.context.ApplicationContext;



public class MyListener implements ServletContextListener {
	private static MyJobScheduler myJobScheduler;
	@Override
	public void contextDestroyed(ServletContextEvent arg0) {
		try {
			MyJobScheduler.getScheduler().shutdown();
		} catch (SchedulerException e) {
			e.printStackTrace();
		}
	}

	@Override
	public void contextInitialized(ServletContextEvent arg0) {
		myJobScheduler = new MyJobScheduler();
	}

}




import java.util.Date;

import org.quartz.JobDetail;
import org.quartz.Scheduler;
import org.quartz.SchedulerException;
import org.quartz.SchedulerFactory;
import org.quartz.SimpleTrigger;
import org.quartz.impl.StdSchedulerFactory;

public class MyJobScheduler {
	private static SchedulerFactory schedulerFactory = new StdSchedulerFactory();
	private static Scheduler scheduler = null;

	
	public static Scheduler getScheduler() {
		return scheduler;
	}


	public MyJobScheduler(){
		try {
			scheduler.start();
		} catch (SchedulerException e) {
			e.printStackTrace();
		}
	}
	
	
	static{
		try {
			scheduler = schedulerFactory.getScheduler();
			JobDetail jobDetail = new JobDetail("job1", "jgroup", MyJob.class);
			SimpleTrigger simpleTrigger = new SimpleTrigger("simpleTrigger", new Date(), null, SimpleTrigger.REPEAT_INDEFINITELY, Long.parseLong(ReadingProperties.getPp().getProperty("time")));
			scheduler.scheduleJob(jobDetail, simpleTrigger);
			
		} catch (NumberFormatException e) {
			e.printStackTrace();
		} catch (SchedulerException e) {
			e.printStackTrace();
		}
	}
}

在web.xml中需要加上

 <listener>
  	<listener-class>com.energyfuture.action.MyListener</listener-class>
  </listener>

这样我们就可以在tomcat启动时就做我们要做的事情