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设置全局的timer需要在web.xml中添加servlet, 并设置load-on-startup 为 1, 然后在servlet的init()中开启timer, 具体代码如下：
1. web.xml
<servlet> <servlet-name>backup</servlet-name> <servlet-class>locationService.backup.Backup</servlet-class> <load-on-startup>1</load-on-startup> </servlet>
2. Backup.java
public class Backup extends HttpServlet {
private static final long serialVersionUID = 1L;
private static final Logger logger = Logger.getLogger(Backup.class);
public void init() throws ServletException
{
TimerTask bakcupTask = new TimerTask(){
public void run(){
try {
backup();
} catch (Exception e) {
e.printStackTrace();
}
}
};
/* Schedule the task to be run every 24 hours */
Timer time = new Timer();
time.scheduleAtFixedRate(bakcupTask, new Date(),1000*60*60*24);
}
...
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原文地址：http://www.cnblogs.com/codingforum/p/4425610.html
