配置 Struts2 Hello World

http://javaweb.group.iteye.com/group/wiki/1505-struts2-under-helloworld---how-to-make-the-first-of-the-running-struts2

在刚刚下载的struts2-1-6目录下的lib中复制出如下六个文件
commons-logging-1.0.4.jar
freemarker-2.3.8.jar
ognl-2.6.11.jar
struts2-core-2.0.6.jar
xwork-2.0.1.jar
以及（因为是struts2-1-6版本的。所以一下这个文件也必不可少）
commons-fileupload-1.2.1

然后粘贴到WebRoot/WEB-INF/lib即可；
第四步：
WebRoot目录下新建一个login.jsp
代码如下
login.jsp

    <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>  
    <%  
    String path = request.getContextPath();  
    String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
    %>  
      
    <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
    <html>  
      <head>  
        <base href="<%=basePath%>">  
          
        <title>My JSP 'login.jsp' starting page</title>  
          
        <meta http-equiv="pragma" content="no-cache">  
        <meta http-equiv="cache-control" content="no-cache">  
        <meta http-equiv="expires" content="0">      
        <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">  
        <meta http-equiv="description" content="This is my page">  
        <!--  
        <link rel="stylesheet" type="text/css" href="styles.css">  
        -->  
      
      </head>  
        
      <body>  
        <form action="login.action" method="post">  
            username: <input name="username" type="text"><br>  
            password: <input name="password" type="password"><br>  
              
            <input type="submit" value="submit">  
        </form>  
      </body>  
    </html>

第五步：
修改WEB-INF下的web.xml文件
代码如下
web.xml

    <?xml version="1.0" encoding="UTF-8"?>  
    <web-app 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">  
      
        <filter>  
            <filter-name>struts2</filter-name>  
            <!-- 控制器 -->  
            <filter-class>  
            org.apache.struts2.dispatcher.FilterDispatcher  
            </filter-class>  
        </filter>                                                                 
                   
                   
                 <filter-mapping>  
                    <filter-name>struts2</filter-name>  
                    <!-- 任何请求均有过滤器 -->  
                    <url-pattern>/*</url-pattern>  
                 </filter-mapping>  
    </web-app>

第六步：
新建action
在src目录下新建包com.test.action
在包中新建一个action代码如下
LoginAction.java

    package com.test.action;  
      
    public class LoginAction   
    {  
          
      
                            //getter和setter方法   就是根据这里的方法名来匹配客户端的信息  
        public String getUsername() {  
            return username;  
        }  
        public void setUsername(String username) {  
            this.username = username;  
        }  
        public String getPassword() {  
            return password;  
        }  
        public void setPassword(String password) {  
            this.password = password;  
        }  
          
                   public String execute() throws Exception  
                   {  
                       return "success";  
                   }  
          
        //对应表单上的  
        private String username;  
        private String password;  
    }

第七步：
struts配置文件

在src目录下新建一个struts.xml代码如下：

    <?xml version="1.0" encoding="utf-8" ?>  
    <!DOCTYPE struts PUBLIC  
        "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"   
        "http://struts.apache.org/dtds/struts-2.0.dtd">  
                  
    <struts>  
                         
                       <package name="struts2" extends="struts-default">  
                                <action name="login" class="com.test.action.LoginAction">  
                                            <!-- result没有名字是默认的success -->  
                                        <result name="success">/result.jsp</result>  
                                </action>  
                        </package>  
    </struts>

注意，struts.xml中有句话是
!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

红色这句可能会报错，解决的方法是将“http://”字样去掉其他我不知道还有什么方法，有高手知道请指点一二；

第八步；
新建result文件
在WebRoot目录下新建一个result.jsp文件代码如下：

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>  
<%  
String path = request.getContextPath();  
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
%>  
  
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">  
<html>  
  <head>  
    <base href="<%=basePath%>">  
      
    <title>My JSP 'result.jsp' starting page</title>  
      
    <meta http-equiv="pragma" content="no-cache">  
    <meta http-equiv="cache-control" content="no-cache">  
    <meta http-equiv="expires" content="0">      
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">  
    <meta http-equiv="description" content="This is my page">  
    <!--  
    <link rel="stylesheet" type="text/css" href="styles.css">  
    -->  
  
  </head>  
    
  <body>  
helloworld  
        username: ${requestScope.username }<br>  
        password: ${requestScope.password }  
  </body>  
</html>