监听器Listener中使用Spring创建的bean

package com.dxcollector.spider;import java.util.Timer;import javax.servlet.ServletContext;import javax.servlet.ServletContextEvent;import javax.servlet.ServletContextListener;import org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;/** * 任务监听器 *  * @author 忧里修斯 * */public class TaskListener implements ServletContextListener {public void contextDestroyed(ServletContextEvent context) {}public void contextInitialized(ServletContextEvent context) {ServletContext servletContext = context.getServletContext();WebApplicationContext wac = WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);SheduleTask sheduleTask = (SheduleTask) wac.getBean("sheduleTask");Timer timer = new Timer();//每隔30分钟执行一次//timer.schedule(new SheduleTask(), 0,1000*60*30);timer.schedule(sheduleTask, 0,1000*60*30);}}