servlet，filter，listener三者的載入順序
阿新 • • 發佈：2019-02-02
我們在配置tomcat的入口檔案web.xml時，一般都配置這三項，那他們的執行順序你知道？
<!-- 載入spring容器 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/applicationContext-*.xml</param-value> </context-param> <!-- spring的監聽器 --> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!-- 中文過濾器 --> <filter> <filter-name>encoding</filter-name> <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class> <init-param> <param-name>encoding</param-name> <param-value>UTF-8</param-value> </init-param> </filter> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>*.do</url-pattern> </filter-mapping> <filter-mapping> <filter-name>encoding</filter-name> <url-pattern>*.shtml</url-pattern> </filter-mapping> <!-- springmvc--> <servlet> <servlet-name>front</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:spring/springmvc.xml</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>front</servlet-name> <url-pattern>*.do</url-pattern> </servlet-mapping>
經過測試他們的載入順序是，listener，filter，servlet（和他們在xml配置的先後無關）