集成struts2 mvc

添加jee5(demo中的third-lib/jee5目录中)的jar到java build path中

复制struts2的jar包到lib目录，并添加这些jar到java build path中
struts2(下载)的包依赖关系如：

=============================================
struts2 lib: v2.2.3
	struts2-core-2.2.3.jar
	xwork-core-2.2.3.jar
	ognl-3.0.1.jar
	
	depend on libs:
		commons-io-2.0.1.jar
		commons-lang-2.5.jar
		freemarker-2.3.16
=============================================

最终java build path如图：

在目录WEB-INF/jsp中创建登录页面login.jsp和welcome.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
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>系统登录:</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">
	</head>

	<body>
		<form action="loginAction!check.do" method="post">
			<table align="center">
					<tr><td>用户名：</td><td><input name="userName" value="${userName }"></td></tr>
					<tr><td>密&nbsp;码：</td><td><input name="password" type="password"></td></tr>
					<tr><td><input type="submit" value="登录"></td><td><input type="reset" value="重置"></td></tr>
			</table>
		</form>
	</body>
</html>

welcome.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
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>系统首页</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">
	</head>

	<body>
		<center>
			<h1>欢迎您：${userName }!</h1>
		</center>
	</body>
</html>

创建登录验证action, LoginAction

/**
 * Copyright (c) 2010-2020 by wasion.com
 * All rights reserved.
 * @author <a href="mailto:skzr.org@gmail.com">skzr.org</a>
 * @date 2011-5-19 下午10:20:57
 */
package org.skzr.demo.action;

import com.opensymphony.xwork2.ActionSupport;

/**
 * 登录检测
 * @author <a href="mailto:skzr.org@gmail.com">skzr.org</a>
 * @version 1.0.0
 * @since JDK1.6
 */
public class LoginAction extends ActionSupport {
	private static final long serialVersionUID = 1L;
	/** 用户名 */
	private String userName;
	/** 密码 */
	private String password;
	
	/**
	 * @return {@link #userName}
	 */
	public String getUserName() {
		return userName;
	}
	/**
	 * @param userName {@link #userName}
	 */
	public void setUserName(String userName) {
		this.userName = userName;
	}
	/**
	 * @return {@link #password}
	 */
	public String getPassword() {
		return password;
	}
	/**
	 * @param password {@link #password}
	 */
	public void setPassword(String password) {
		this.password = password;
	}

	/**
	 * 登录验证
	 * @return 验证后页面视图
	 */
	public String check() {
		return "admin".equals(userName) ? "welcome" : "success";
	}
}

修改web.xml文件，增加struts2拦截器配置

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
	<description>我爱编程</description>
	<display-name>我爱编程</display-name>
	
	<filter>
		<filter-name>struts2</filter-name>
		<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
		<init-param>
			<param-name>config</param-name>
			<param-value>struts-default.xml,struts-plugin.xml,struts.xml</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>struts2</filter-name>
		<url-pattern>*.do</url-pattern>
	</filter-mapping>
	
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
</web-app>

创建struts.xml文件，并配置LoginAction

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd">
<struts>
	<package name="demo" extends="struts-default" namespace="/">
		<action name="loginAction" class="org.skzr.demo.action.LoginAction">
			<result>/WEB-INF/jsp/login.jsp</result>
			<result name="welcome">/WEB-INF/jsp/welcome.jsp</result>
		</action>
	</package>
</struts>

struts.properties文件配置为：

##这个根本不能够使用 struts.configuration.files=struts-default.xml,struts-plugin.xml,struts.xml,cfg/struts/struts-cems.xml
#struts.i18n.encoding=UTF-8
#指定Struts2处于开发状态
struts.devMode=false
struts.i18n.reload=false
#指定当Struts2配置文件改变后，web框架是否重新加载Struts2的配置文件
struts.configuration.xml.reload=false
#是不是允许actionName!MethodName.action的调用形式
#struts.enable.DynamicMethodInvocation=true
#struts.custom.i18n.resources=globalMessages
#配置服务器运行的端口号（所有生成的URL都会被正确创建）
#struts.url.http.port = 8080
#struts.serve.static.browserCache=false
#struts.custom.i18n.resources=i18n
#struts.ui.templateDir=/WEB-INF/template
### struts标签使用哪种默认样式
#struts.ui.theme=simple

### struts标签的模板所在路径
#struts.ui.templateDir=template

## struts拦截的名称，防止出现问题
struts.action.extension=do
#struts.objectFactory=spring

#struts.multipart.saveDir=temp/
#struts.multipart.maxSize=10485760
#struts.enable.SlashesInActionNames=true