Spring MVC web.xml file analysis description

Spring MVC web.xml file analysis description

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns="http://xmlns.jcp.org/xml/ns/javaee"
	xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
	version="3.1">

	<!-- //1. Provide a name that GUI tools may use to label this particular web application -->
	<display-name>CESmart</display-name>

	<!-- //1. Used to declare the context initialization parameters within the application scope (the entire WEB project). -->
	<!-- //2.param-name, is key -->
	<!-- //3.param-value,为value -->
	<context-param>
		<param-name>WebApp</param-name>
		<param-value>com.proserver</param-value>
	</context-param>

	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/configs/spring/applicationContext*.xml</param-value>
	</context-param>

	<!-- //1. Initialize the spring environment, use contextConfigLocation in context-param -->
	<!-- //2. The web container uses the instance of ContextLoaderListener to complete the initialization of SpringMVC, which is to establish a working environment (context) -->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>

	<!-- //1. The servlet specified by the Context of the container (Tomcat) -->
	<!-- //2. servlet initialization and DispatcherServlet establish related mapping relationship -->
	<servlet>
		<servlet-name>SpringMVC</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<init-param>
			<!-- //1. Parameters used when DispatcherServlet runs, -->
			<!-- //2.DispatcherServlet needs to scan those names to find the controller, and establish a mapping table relationship -->
			<param-name>contextConfigLocation</param-name>
			<param-value>/WEB-INF/configs/spring/mvc-demo-servlet.xml,/WEB-INF/configs/spring/applicationContext*.xml
            </param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<!-- //1. The URL of the servlet specified by the Context of the container (Tomcat) -->
	<!-- //2.url-pattern defines matching mapping filtering (there can be multiple) -->
	<!-- //(1). Strings starting with "/" and ending with "/*" are used for path mapping. Such as "/xing/*" -->
	<!-- //(2). Starting with "*.", it is used for extended mapping. (extension match) -->
	<!-- //(3). A string containing only "/", specifying the current servlet as the default servlet for the application. Such as "/xing/*" -->
	<!-- //(4). Others are exact matches. Such as "/TestConnect" -->
	<servlet-mapping>
		<servlet-name>SpringMVC</servlet-name>
		<!-- <url-pattern>/</url-pattern> -->
		<url-pattern>/xing/*</url-pattern>
	</servlet-mapping>

	<listener>
		<description>HttpSessionListener监听器</description>
		<listener-class>com.proserver.common.controller.Test.Listener.MyServletContextListener</listener-class>
	</listener>

	<!-- //1. Filter configuration -->
	<filter>
		<filter-name>filterTest3</filter-name>
		<filter-class>com.proserver.common.controller.Test.filter.FilterTest3</filter-class>
		<init-param>
			<param-name>userName</param-name>
			<param-value>HelloWorld</param-value>
		</init-param>
	</filter>
	<!-- //1. Filter rule configuration -->
	<filter-mapping>
		<filter-name>filterTest3</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>
</web-app>