tomcat定时任务

1.监听类

import java.util.Timer;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;  
public class TestListener implements ServletContextListener {
    
    private Timer timer = null;
    public void contextInitialized(ServletContextEvent event){
        timer = new Timer(true);
        timer.schedule(new TestTimer(), 0, 2000); 
    }
    public void contextDestroyed(ServletContextEvent event){     
        timer.cancel();
    }
}

import java.util.Timer;
import javax.serv