package com.huawei.common.example;
import java.util.Timer;
import java.util.TimerTask;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
public class TimeJobDemo implements ServletContextListener {
Timer timer;
public void contextDestroyed(ServletContextEvent arg0) {
timer.cancel();
System.out.println("定时器关闭");
}
public void contextInitialized(ServletContextEvent arg0) {
System.out.println("定时器启动");
timer = new Timer();
timer.schedule(new Task(), 5000, 2 * 1000);// 服务启动5秒后,每隔二十秒执行一次
System.out.println("----XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX");
}
public static void main(String[] args){
new TimeJobDemo().contextInitialized(null);
}
}
package com.huawei.common.example;
import java.text.SimpleDateFormat;
import java.util.Timer;
import java.util.TimerTask;
class Task extends TimerTask{
private static SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
@Override
public void run() {
System.out.println("开始执行任务:"+sdf.format(new java.util.Date()));
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("执行任务。。。。。。。");
System.out.println("执行任务结束:"+sdf.format(new java.util.Date()));
}
}