进程停止,由此进程启动的线程也会停止;
一、触发器类
package my.test
import java.util.Timer;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
/**
* 任务触发器,Tomcat启动时
*
* @author Administrator
*
*/
public class TaskTrigger implements ServletContextListener
{
private Timer timer = null;
private TaskThread task = null;
public void contextInitialized(ServletContextEvent event)
{
//初始化监听器,在tomcat启动的时候监听器启动
timer = new Timer(true);
task = TaskThread.GetTaskThread(event.getServletContext());
timer.schedule(task, 1000);//延迟1s后执行,当然也可以定时循环执行,请自己查看Timer类的说明
log.info("启动任务进程************");
}
public void contextDestroyed(ServletContextEvent event)
{
//关闭监听器
timer.cancel();
log.info("关闭任务进程************");
}
}
二、任务类,必须继承java.util.TimerTask类
package my.test
public class TaskThread extends TimerTask
{
public static TaskThread taskThread = null;
@SuppressWarnings("unused")
private ServletContext context = null;
public TaskThread(ServletContext context)
{
this.context = context;
}
public static TaskThread GetTaskThread(ServletContext context)
{
if(taskThread ==null)
taskThread = new TaskThread(context);
return taskThread ;
}
public void run()
{
// 在此添加要执行的任务
}
}
三、在web.xml中添加
<listener>
<listener-class>my.test.TaskTrigger</listener-class>
</listener>
一、触发器类
package my.test
import java.util.Timer;
import javax.servlet.ServletContextEvent;
import javax.servlet.ServletContextListener;
/**
* 任务触发器,Tomcat启动时
*
* @author Administrator
*
*/
public class TaskTrigger implements ServletContextListener
{
private Timer timer = null;
private TaskThread task = null;
public void contextInitialized(ServletContextEvent event)
{
//初始化监听器,在tomcat启动的时候监听器启动
timer = new Timer(true);
task = TaskThread.GetTaskThread(event.getServletContext());
timer.schedule(task, 1000);//延迟1s后执行,当然也可以定时循环执行,请自己查看Timer类的说明
log.info("启动任务进程************");
}
public void contextDestroyed(ServletContextEvent event)
{
//关闭监听器
timer.cancel();
log.info("关闭任务进程************");
}
}
二、任务类,必须继承java.util.TimerTask类
package my.test
public class TaskThread extends TimerTask
{
public static TaskThread taskThread = null;
@SuppressWarnings("unused")
private ServletContext context = null;
public TaskThread(ServletContext context)
{
this.context = context;
}
public static TaskThread GetTaskThread(ServletContext context)
{
if(taskThread ==null)
taskThread = new TaskThread(context);
return taskThread ;
}
public void run()
{
// 在此添加要执行的任务
}
}
三、在web.xml中添加
<listener>
<listener-class>my.test.TaskTrigger</listener-class>
</listener>