<?xml version="1.0" encoding="UTF-8"?><web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaeehttp://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
//以上为web.xml头信息，
//让web容器初始化的时候初始化这些配置，*号代表通配符，会在根目录下和jar包里找
<context-param><param-name>contextConfigLocation</param-name><param-value>classpath*:applicationContext.xmlclasspath:applicationContext-quartz.xmlclasspath:applicationContext-security.xml</param-value></context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>
//eclipse自带的字符编码过滤,打开web.xml,点到Tree ,选择web.xml右击新建Filte
//搜索 CharacterEncodingFilter
//<init-param>这个标签代表在这里过滤器的范围内，初始化的时候初始化该值，然后在这个过滤器里进行设值进去
<filter><filter-name>characterEncodingFilter</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>characterEncodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping>
//serlet 的配置 ，会拦截到url-pattern这个值的请求
<servlet><servlet-name>UploadServlet</servlet-name><servlet-class>com.ecar.mp.servlet.UploadServlet</servlet-class><init-param><param-name>filepath</param-name><param-value>upload</param-value></init-param><load-on-startup>2</load-on-startup></servlet><servlet-mapping><servlet-name>UploadServlet</servlet-name><url-pattern>/upload</url-pattern></servlet-mapping>
//前端控制器；springmvc的入口，*.do所有以.do结尾的请求都会被拦截
<servlet><servlet-name>springDispatcherServlet</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup></servlet><!-- Map all requests to the DispatcherServlet for handling --><servlet-mapping><servlet-name>springDispatcherServlet</servlet-name><url-pattern>*.do</url-pattern></servlet-mapping>
//配置服务启动以后初始化的页面或者请求路径
<welcome-file-list><welcome-file>index.html</welcome-file></welcome-file-list>
此配置是整合spring,springmvc的配置，整体介绍就是让web容器初始化的时候，去初始化spring容器；
以及springmvc的入口DispatcherServlet
——this)
