spring管理service类

package com.job;import javax.servlet.ServletContext;import javax.servlet.ServletContextEvent;import org.apache.log4j.Logger;import org.springframework.context.ApplicationContext;import org.springframework.web.context.ContextLoaderListener;import org.springframework.web.context.support.WebApplicationContextUtils;public class ContextUtil extends ContextLoaderListener{    /**     * Logger for this class     */    private static final Logger logger = Logger.getLogger(ContextUtil.class);    private static ApplicationContext context;    @Override    public void contextInitialized(ServletContextEvent event)    {        logger.debug("ContextUtil contextInitialized method running...");        super.contextInitialized(event);        ServletContext context = event.getServletContext();        ApplicationContext ctx = WebApplicationContextUtils                .getRequiredWebApplicationContext(context);        ContextUtil.setContext(ctx);        logger.debug("ContextUtil context initialized ok.");    }    public static ApplicationContext getContext()    {        return context;    }    public static void setContext(ApplicationContext context)    {        ContextUtil.context = context;    }}如何在manager中获得service对象BaseService JobService = (BaseService) ContextUtil.getContext().getBean("jobService");