所在类：org.springframework.web.servlet.DispatcherServlet

    1.     protected void doService(HttpServletRequest request, HttpServletResponse response) throws Exception {
    2.         this.logRequest(request);
    3.         Map<String, Object> attributesSnapshot = null;
    4.         if (WebUtils.isIncludeRequest(request)) {
    5.             attributesSnapshot = new HashMap();
    6.             Enumeration attrNames = request.getAttributeNames();
    8.             label120:
    9.             while(true) {
    10.                 String attrName;
    11.                 do {
    12.                     if (!attrNames.hasMoreElements()) {
    13.                         break label120;
    14.                     }
    16.                     attrName = (String)attrNames.nextElement();
    17.                 } while(!this.cleanupAfterInclude && !attrName.startsWith("org.springframework.web.servlet"));
    19.                 attributesSnapshot.put(attrName, request.getAttribute(attrName));
    20.             }
    21.         }
    23.         request.setAttribute(WEB_APPLICATION_CONTEXT_ATTRIBUTE, this.getWebApplicationContext());
    24.         request.setAttribute(LOCALE_RESOLVER_ATTRIBUTE, this.localeResolver);
    25.         request.setAttribute(THEME_RESOLVER_ATTRIBUTE, this.themeResolver);
    26.         request.setAttribute(THEME_SOURCE_ATTRIBUTE, this.getThemeSource());
    27.         if (this.flashMapManager != null) {
    28.             FlashMap inputFlashMap = this.flashMapManager.retrieveAndUpdate(request, response);
    29.             if (inputFlashMap != null) {
    30.                 request.setAttribute(INPUT_FLASH_MAP_ATTRIBUTE, Collections.unmodifiableMap(inputFlashMap));
    31.             }
    33.             request.setAttribute(OUTPUT_FLASH_MAP_ATTRIBUTE, new FlashMap());
    34.             request.setAttribute(FLASH_MAP_MANAGER_ATTRIBUTE, this.flashMapManager);
    35.         }
    37.         RequestPath requestPath = null;
    38.         if (this.parseRequestPath && !ServletRequestPathUtils.hasParsedRequestPath(request)) {
    39.             requestPath = ServletRequestPathUtils.parseAndCache(request);
    40.         }
    42.         try {
    43.             this.doDispatch(request, response);
    44.         } finally {
    45.             if (!WebAsyncUtils.getAsyncManager(request).isConcurrentHandlingStarted() && attributesSnapshot != null) {
    46.                 this.restoreAttributesAfterInclude(request, attributesSnapshot);
    47.             }
    49.             if (requestPath != null) {
    50.                 ServletRequestPathUtils.clearParsedRequestPath(request);
    51.             }
    53.         }
    55.     }