struts2基础

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>
     <package name="hello" namespace="/" extends="struts-default">
         <action name="HelloWorld" class="com.struts2.action.HelloWorld">
            <result>helloWorld.jsp</result>
        </action>
     </package>
</struts>

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>struts2</display-name>
  
  <!-- 
  StrutsPrepareAndExecuteFilter类是Struts2的控制器，用于过滤
     客户端的所有请求。它是Struts2框架的入口，如果未在web.xml
     中进行配置，Struts2框架就会失去其作用
  
   -->
  <filter>
     <filter-name>struts2</filter-name>
         <filter-class>
       org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
         </filter-class>
    </filter>
    <filter-mapping>
         <filter-name>struts2</filter-name>
         <url-pattern>*.action</url-pattern>
    </filter-mapping>
  
  
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>