web.xml简单配置

<?xml version="1.0" encoding="UTF-8"?><web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd "> <display-name>hello_world</display-name> <servlet>      <servlet-name>dateServlet</servlet-name>      <servlet-class>web.DateServlet</servlet-class>      <init-param>        <param-name>test</param-name>        <param-value>test.t</param-value>      </init-param> </servlet>  <servlet-mapping>      <servlet-name>dateServlet</servlet-name>      <url-pattern>/date</url-pattern>  </servlet-mapping>  <welcome-file-list>    <welcome-file>info.jsp</welcome-file>  </welcome-file-list>  <servlet>    <servlet-name>deal</servlet-name>    <servlet-class>web.DealWithServlet</servlet-class>  </servlet>  <servlet-mapping>    <servlet-name>deal</servlet-name>    <url-pattern>/web/DealWithServlet</url-pattern>  </servlet-mapping>  <filter>    <filter-name>Encoding</filter-name>    <filter-class>web.EnCondingFilter</filter-class>  </filter>  <filter-mapping>    <filter-name>Encoding</filter-name>    <url-pattern>/*</url-pattern>  </filter-mapping>  <error-page>    <error-code>404</error-code>    <location>/anErrorPage.jsp</location>  </error-page>  <error-page>    <exception-type>java.lang.Exception</exception-type>    <location>/anErrorPage.jsp</location>  </error-page>  <servlet>    <servlet-name>stu</servlet-name>    <servlet-class>web.StudentServlet</servlet-class>  </servlet>  <servlet-mapping>    <servlet-name>stu</servlet-name>    <url-pattern>/stu</url-pattern>  </servlet-mapping>  <servlet>    <servlet-name>file</servlet-name>    <servlet-class>web.FileServlet</servlet-class>  </servlet>  <servlet-mapping>    <servlet-name>file</servlet-name>    <url-pattern>/fileServlet</url-pattern>  </servlet-mapping>  <filter>    <filter-name>ses</filter-name>    <filter-class>web.SessionFilter</filter-class>  </filter>  <filter-mapping>    <filter-name>ses</filter-name>    <servlet-name>sess</servlet-name>  </filter-mapping>  <servlet>    <servlet-name>sess</servlet-name>    <servlet-class>web.SessionServlet</servlet-class>  </servlet>  <servlet-mapping>    <servlet-name>sess</servlet-name>    <url-pattern>/sess</url-pattern>  </servlet-mapping>  <filter-mapping>    <filter-name>ses</filter-name>    <url-pattern>/welcome.jsp</url-pattern>  </filter-mapping></web-app>