Java定时执行任务

package com.ygkq.usermanager.controller.utils;

 

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Timer;
import java.util.TimerTask;

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

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

 public void contextInitialized(ServletContextEvent event) {
  timer = new Timer(true);  
  timer.schedule(new CleanClicksListener(event.getServletContext()), 0,60*60*1000*24);
   }

 public void contextDestroyed(ServletContextEvent event)   timer.cancel();
  event.getServletContext().log("Timer Destory");
 }
}

class CleanClicksListener extends TimerTask{
 @SuppressWarnings("unused")
 private ServletContext context = null;
 
 public CleanClicksListener(ServletContext context) {
  this.context = context;
 }

 public void run(){
  /*

你要执行的任务

 */  } catch (SQLException e) {
   e.printStackTrace();
  }
 }
}

 

web.xml里面配置：

<!-- 监听器 每隔二十四小时初始化软文点击量-->
 <listener>
  <listener-class>
   com.ygkq.usermanager.controller.utils.SysContextListener
  </listener-class>
 </listener>