鐪嬩竴涓婥ontextLoaderListener鐨勬簮鐮?榪欐槸涓涓猄ervletContextListener
/**
聽 * Initialize the root web application context.
聽 */
聽public void contextInitialized(ServletContextEvent event) {
聽 this.contextLoader = createContextLoader();
聽 this.contextLoader.initWebApplicationContext(event.getServletContext());
聽}
聽
聽 /**
聽 * Create the ContextLoader to use. Can be overridden in subclasses.
聽 * @return the new ContextLoader
聽 */
聽protected ContextLoader createContextLoader() {
聽 return new ContextLoader();
聽}
聽contextLoader鐨勬簮鐮?br />聽public WebApplicationContext initWebApplicationContext(ServletContext servletContext)
聽聽 throws BeansException {
聽 long startTime = System.currentTimeMillis();
聽 if (logger.isInfoEnabled()) {
聽聽 logger.info("Root WebApplicationContext: initialization started");
聽 }
聽 servletContext.log("Loading Spring root WebApplicationContext");
聽 try {
聽聽 // Determine parent for root web application context, if any.
聽聽 ApplicationContext parent = loadParentContext(servletContext);
聽聽 WebApplicationContext wac = createWebApplicationContext(servletContext, parent);
聽聽 servletContext.setAttribute(
聽聽聽聽 WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, wac);
聽聽 if (logger.isInfoEnabled()) {
聽聽聽 logger.info("Using context class [" + wac.getClass().getName() +
聽聽聽聽聽 "] for root WebApplicationContext");
聽聽 }
聽聽 if (logger.isDebugEnabled()) {
聽聽聽 logger.debug("Published root WebApplicationContext [" + wac +
聽聽聽聽聽 "] as ServletContext attribute with name [" +
聽聽聽聽聽 WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE + "]");
聽聽 }
聽聽 if (logger.isInfoEnabled()) {
聽聽聽 long elapsedTime = System.currentTimeMillis() - startTime;
聽聽聽 logger.info("Root WebApplicationContext: initialization completed in " + elapsedTime + " ms");
聽聽 }
聽聽 return wac;
聽 }
聽 catch (RuntimeException ex) {
聽聽 logger.error("Context initialization failed", ex);
聽聽 servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, ex);
聽聽 throw ex;
聽 }
聽 catch (Error err) {
聽聽 logger.error("Context initialization failed", err);
聽聽 servletContext.setAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE, err);
聽聽 throw err;
聽 }
聽}
聽娉ㄦ剰WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE,榪欓噷闈㈡斁浜哤ebApplicationContext,闇瑕佷嬌鐢ㄦ椂浠嶴ervletContext鍙栧嚭
聽鍙互浣跨敤WebApplicationContextUtils寰楀埌WebApplicationContext
聽public static WebApplicationContext getWebApplicationContext(ServletContext sc) {
聽 Object attr = sc.getAttribute(WebApplicationContext.ROOT_WEB_APPLICATION_CONTEXT_ATTRIBUTE);
聽 if (attr == null) {
聽聽 return null;
聽 }
聽 if (attr instanceof RuntimeException) {
聽聽 throw (RuntimeException) attr;
聽 }
聽 if (attr instanceof Error) {
聽聽 throw (Error) attr;
聽 }
聽 if (!(attr instanceof WebApplicationContext)) {
聽聽 throw new IllegalStateException("Root context attribute is not of type WebApplicationContext: " + attr);
聽 }
聽 return (WebApplicationContext) attr;
聽}
聽鍏抽敭鐨勯棶棰樺湪浜巗truts濡備綍鍚姩鐨剆pring鐨?ContextLoaderPlugIn鐨勬簮鐮?br />聽
聽// Publish the context as a servlet context attribute.
聽 String attrName = getServletContextAttributeName();
聽 getServletContext().setAttribute(attrName, wac);
聽
聽public String getServletContextAttributeName() {
聽 return SERVLET_CONTEXT_PREFIX + getModulePrefix();
聽}
聽涓嶅悓鍔犺澆鐨凨ey绔熺劧涓嶅悓,鍘熷洜灝辨槸WebApplicationContext鏀懼湪閭ｉ噷鐨勯棶棰?鍙痵pring璋冪敤鐨勬椂鍊欎細鏍規嵁WebApplicationContext閲岄潰瀹氫箟鐨勯偅涓悕瀛楀幓鎵劇殑,闂鍑哄湪榪欓噷
聽鍦╯truts-config.xml涓厤緗?br />聽聽聽 <plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">
聽聽聽聽聽 <set-property property="contextConfigLocation" value="/WEB-INF/applicationContext.xml" />
聽聽聽 </plug-in>
聽聽聽 <controller>
聽聽聽聽聽聽聽 <set-property property="processorClass" value="org.springframework.web.struts.DelegatingRequestProcessor" />
聽聽聽 </controller>
聽鍘熺悊鏄繖鏍風殑,Struts铏界劧鍙兘鏈変竴涓狝ctionServlet瀹炰緥,浣嗘槸瀵逛簬涓嶅悓鐨勫瓙搴旂敤鍒嗗埆鑳芥湁鑷繁鐨凴equestProcessor瀹炰緥姣忎釜RequestProcessor瀹炰緥鍒嗗埆瀵瑰簲涓嶅悓鐨剆truts閰嶇疆鏂囦歡銆?br />聽聽 瀛愬簲鐢ㄧ殑ProcessorClass綾誨繀欏婚噸鍐欎竴鑸氨鏄戶鎵縍equestProcessor綾伙紝鐒跺悗鍐嶅叾閰嶇疆鏂囦歡鐨刢ontroller鍏冪礌涓殑<processorClass>灞炴т腑浣滃嚭淇敼銆傞偅涔堝綋
聽 getRequestProcessor(getModuleConfig(request)).process(request,response);灝辮兘鏍規嵁request閫夋嫨鐩稿簲鐨刴oduleconfig,鍐嶆牴鎹叾<processorClass>灞炴ч夋嫨鐩稿簲鐨凴equestProcessor瀛愮被鏉ュ鐞嗙浉搴旂殑璇鋒眰浜嗐?/p>
聽