spring管理下系统加载类

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系统加载时执行的类，也是我们将需要加载的参数配置的地方。必须实现 ServletContextListener

package com.chain.store.mutual;import javax.servlet.ServletContext;import javax.servlet.ServletContextEvent;import javax.servlet.ServletContextListener;import org.springframework.context.ApplicationContext;import org.springframework.web.context.WebApplicationContext;import org.springframework.web.context.support.WebApplicationContextUtils;import com.chain.store.bean.SystemParamBean;import com.chain.store.service.impl.SystemParamServicesImpl;public class LoadConfiguration implements ServletContextListener {private static final long serialVersionUID = 1L;//private SystemParamServicesImpl sysParamService;private static WebApplicationContext springContext; private SystemParamBean sysBean ;private ServletContext context;public LoadConfiguration(){super();}public void contextDestroyed(ServletContextEvent sce) {System.out.println("系统停止......");}@SuppressWarnings("unchecked")public void contextInitialized(ServletContextEvent sce) {// TODO Auto-generated method stubSystem.out.println("系统启动加载......");springContext = WebApplicationContextUtils.getWebApplicationContext(sce.getServletContext()); SystemParamServicesImpl sysServices = (SystemParamServicesImpl)springContext.getBean("sysParamService");sysBean = sysServices.listAllParams();context = sce.getServletContext();context.setAttribute("sysParams", sysBean);} public static ApplicationContext getApplicationContext() { return springContext; } }

说明：

SystemParamBean 放置我需要加载的系统参数

sysParamService 是我在 applicationContext.xml 中配置的从数据库中得到参数值的bean

当然不要忘记在 web.xml 中添加

<listener> <listener-class> com.chain.store.mutual.LoadConfiguration </listener-class> </listener>

在Action 中得到系统参数：

ServletContext context = ServletActionContext.getServletContext();SystemParamBean sysBean = (SystemParamBean)context.getAttribute("sysParams");System.out.println("----------系统参数----------");System.out.println("NEWS_SHOWIMG " + sysBean.getNEWS_SHOWIMG());System.out.println("---------------------------");

参考文章：

http://hi.baidu.com/29163077/blog/item/b3b77bdd5c1a94ea76c638f7.html

http://lichengyezi.javaeye.com/blog/508128