DispatcherServlet中有九個引用類型的屬性，這就是springmvc的九大組件。

springmvc在工作的時候，關鍵位置都是由這些組件完成的。

/** MultipartResolver used by this servlet 文件上傳解析器 */private MultipartResolver multipartResolver;/** LocaleResolver used by this servlet 區域信息解析器，和國際化有關 */private LocaleResolver localeResolver;/** ThemeResolver used by this servlet 主題解析題 */private ThemeResolver themeResolver;/** List of HandlerMappings used by this servlet Handler映射信息*/private List<HandlerMapping> handlerMappings;/** List of HandlerAdapters used by this servlet Handler適配器*/private List<HandlerAdapter> handlerAdapters;/** List of HandlerExceptionResolvers used by this servlet springmvc強大的異常解析功能，異常解析器 */private List<HandlerExceptionResolver> handlerExceptionResolvers;/** RequestToViewNameTranslator used by this servlet */private RequestToViewNameTranslator viewNameTranslator;/** FlashMapManager used by this servlet */private FlashMapManager flashMapManager;/** List of ViewResolvers used by this servlet 視圖解析器 */private List<ViewResolver> viewResolvers;

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