java定时器,普通类取spring的bean

package com.cqa.cms.utils;

import java.sql.SQLException;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

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

import org.springframework.web.context.support.WebApplicationContextUtils;

import com.cqa.cms.entity.CMSColumn;
import com.cqa.cms.service.IColumnTreeService;
import com.cqa.cms.service.IStatisticsColumnService;

public class TimerListener implements ServletContextListener {

private Timer timer = null;
public void contextDestroyed(ServletContextEvent arg0) {
timer.cancel();
}

public void contextInitialized(ServletContextEvent arg0) {

timer = new Timer();
timer.schedule(new RemoveTopTopicsTask(arg0.getServletContext()), 10000, 1000 * 6 * 1);
}

class RemoveTopTopicsTask extends TimerTask {
private ServletContext context;
public RemoveTopTopicsTask(ServletContext context){
this.context = context;
}
@Override
public void run() {
IColumnTreeService columnTreeService= WebApplicationContextUtils.getWebApplicationContext(context).getBean("columnTreeService", IColumnTreeService.class);
IStatisticsColumnService statisticsColumnService = WebApplicationContextUtils.getWebApplicationContext(context).getBean("statisticsColumnService", IStatisticsColumnService.class);
try {
List<CMSColumn> list = columnTreeService.columnsTree();
statisticsColumnService.accountStatistics(list);
System.out.println(list);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}


}
}