spring 容器外的实例得到spring中的bean，达到启动后初始化数据目的
可用过在web.xml文件中配置一个listener或servlet启动时加载spring的bean，然后用WebApplicationContextUtils.getWebApplicationContext(servletContext).getBean("beanName");
得到bean,然后做需要的操作,得到的bean需要转换成借口类而不是具体类，因为得到的是代理。
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web.xml中的配置
<context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:/applicationContext.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener>
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如通过用servlet方式：
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1.创建servlet类
public class SystemLoadingServlet extends HttpServlet {/** * Constructor of the object. */public SystemLoadingServlet() {super();}/** * Destruction of the servlet. <br> */public void destroy() {super.destroy(); }/** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {}/** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to post. * * @param request the request send by the client to the server * @param response the response send by the server to the client * @throws ServletException if an error occurred * @throws IOException if an error occurred */public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {}/** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */public void init() throws ServletException {SystemParamObject.webNoticeDir=this.getServletContext().getRealPath("/") + "files/notice/";SystemParamObject.webDir=this.getServletContext().getRealPath("/") + "files/";IitemService itemService = (IitemService) WebApplicationContextUtils.getWebApplicationContext(this.getServletContext()).getBean("IItemService");try {itemService.addCreateItemXml();itemService.addCreateKjfsXml();} catch (Exception e) {throw new ServletException("生成栏目或快捷方式xml文件异常", e);}}}?
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2.配置web.xml 注意load-on-startup中的值
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<context-param> <param-name>contextConfigLocation</param-name> <param-value>WEB-INF/conf/applicationContext-*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener><filter> <filter-name>struts2</filter-name> <filter-class> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter </filter-class> <init-param> <param-name>config</param-name> <param-value>struts-default.xml,struts-plugin.xml,../conf/struts.xml</param-value> </init-param> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> <servlet> <servlet-name>initWebDir</servlet-name> <servlet-class>javacode.com.greatchn.tax.servlet.SystemLoadingServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>initWebDir</servlet-name> <url-pattern>/servlet/initWeb</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>login.jsp</welcome-file> </welcome-file-list>
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这样在项目启动后会就会在sevlet初始化时得到spring的bean并做相应操作
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参考http://www.iteye.com/problems/14886