SpringMVC中web.xml配置详解

web.xml配置文件是web项目的核心文件，是web项目的入口文件,web项目的启动从这里开始

头约束配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app 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/javaee
         http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
</web-app>

项目名称

<display-name> com.qd.demo </display-name>

加载spring核心配置文件

<context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:application.xml</param-value>
</context-param>

springmvc配置

<servlet>
    <servlet-name>dispatcherServlet</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>

  <servlet-mapping>
    <servlet-name>dispatcherServlet</servlet-name>
    <url-pattern>/</url-pattern>  //拦截所有url
  </servlet-mapping>

配置编码过滤器

<filter>
    <filter-name>setCharacterEncoding</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>setCharacterEncoding</filter-name>
    <url-pattern>/</url-pattern>
  </filter-mapping>

监听器，可以配置多个

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

session超时时间，单位分钟

<session-config>
    <session-timeout>60</session-timeout>
</session-config>

指定欢迎文件

<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
</welcome-file-list>