java scheduler

一、java自带的 Timer

示例

class-1

import javax.servlet.ServletContextListener;
import java.util.Timer;
import javax.servlet.ServletContextEvent;

public class MyListener implements ServletContextListener {
    private Timer timer = null;

    public void contextInitialized(ServletContextEvent event) {
        timer = new Timer(true);
        timer.schedule(new MyTask(), 0, 1000*10);
    }

    public void contextDestroyed(ServletContextEvent event) {
        timer.cancel();
    }

}

class-2

import java.util.TimerTask;

public class MyTask extends TimerTask{
    public MyTask() {
        System.out.println("new timer "+System.currentTimeMillis());
    }
    public  void run(){
        System.out.println(" timer is running ,time is "+System.currentTimeMillis());
    }
}

配置

<listener>
        <listener-class>MyListener</listener-class>    
    </listener>

二、开源

quartz