Java定时调用

package com.zte.vic.common;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Timer;

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

public class AutoTimeLister implements ServletContextListener {
final LogBean log = new LogBean("auto.log");
int i=0;
private Timer timer;
public void contextDestroyed(ServletContextEvent arg0) {
if(null!=timer)
{
timer.cancel();
}

}

public void contextInitialized(ServletContextEvent arg0) {
timer=new Timer(true);

Date date=new Date();
SimpleDateFormat formatmm = new SimpleDateFormat("mm");
SimpleDateFormat formatss = new SimpleDateFormat("ss");
int mm=(60-Integer.parseInt(formatmm.format(date)))*60;
int ss=Integer.parseInt(formatss.format(date));
log.addlog("start time:"+(mm-ss));

timer.schedule(new AutoJob(),(mm-ss)*1000, 3600*1000);           //定时的调用AutoJob类中的方法

}

}




package com.zte.vic.common;

import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.TimerTask;

import javax.servlet.ServletContext;

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.GetMethod;

public class AutoJob extends TimerTask {


private static boolean isRunning = false;
final LogBean log = new LogBean("auto.log");
ResourceBundle bundle = ResourceBundle.getBundle("resource.auto",
new Locale(""));


@Override
public void run() {
if (!isRunning) {
HttpClient client = new HttpClient();
GetMethod method = new GetMethod(url);
try {
client.executeMethod(method);
Thread.sleep(5 * 1000);
} catch (Exception e) {
log.addlog("finally:" + e.toString());
}


}

}

 

 

 

在web.xml中加入

 <listener>
  <listener-class>
   com.zte.vic.common.AutoTimeLister
  </listener-class>
 </listener>