java web中的计划任务

监听类

package com.jrh.common.message;

import java.util.Calendar;
import java.util.Timer;

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

public class MyListener implements ServletContextListener {

	private static Timer timer;
	private static long period = 60*1000;
	
	@Override
	public void contextDestroyed(ServletContextEvent sce) {
		timer.cancel();
	}

	@Override
	public void contextInitialized(ServletContextEvent sce) {
		if (timer == null) {
			Calendar calendar = Calendar.getInstance();
			timer = new Timer();
			timer.schedule(new MyTask(), calendar.getTime(), period);
		}
	}

}

任务类

package com.jrh.common.message;

import java.util.Calendar;
import java.util.TimerTask;

public class MyTask extends TimerTask {

	@Override
	public void run() {
		System.out.println("开始发短信：----------------------");
		ShortMessage.replyRegisterSure();
	}

}

web.xml配置加上listener

<listener>
  <listener-class>com.jrh.common.message.MyListener</listener-class> 
</listener>