java 三大件 JavaWwe 三大件 servlet Filter listener

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>


  <servlet>
  <!--配置前端控制器-->
  <servlet-name>springmvc</servlet-name>
  <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  <!--初始化参数-->

  <init-param>
  <param-name>contextConfigLocation</param-name>
  <param-value>classpath:applicationContext4.xml</param-value>
   </init-param>
  <!--这句话什么意思:只要tomcat一起动，就将servlet对象创建好放入内存了-->
  <load-on-startup>1</load-on-startup>
</servlet>
  <!--JavaWwe  三大件  servlet  Filter listener-->
<!--静态资源的方式--><!--拦截所有资源-->
  <filter>
    <filter-name>CharactorEncodingFilters</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>
    <init-param>
      <param-name>com.sun.faces.forceLoadConfiguration</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>

  <filter-mapping>
    <filter-name>CharactorEncodingFilters</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>


  <servlet-mapping>
  <servlet-name>springmvc</servlet-name>
  <url-pattern>/</url-pattern>
  </servlet-mapping>
<!--

<servlet-mapping>
  <servlet-name>default</servlet-name>
  <url-pattern>*.jpg</url-pattern>
</servlet-mapping>


  <servlet-mapping>
    <servlet-name>default</servlet-name>
    <url-pattern>*.pn</url-pattern>
  </servlet-mapping>-->
</web-app>