本文介绍了一个简单的Struts2应用实例，通过创建一个包含用户输入姓名并显示问候消息的基本项目来演示Struts2框架的基本用法。项目包括index.jsp用于获取用户输入，msg.jsp用于显示结果，以及HelloAction2.java作为业务逻辑处理。
首先建立项目，在lib目录下导入Struts2所需要的jar包：
两个jsp页面：index.jsp:用户输入你的名字。msg.jsp:输入您好，名字信息。
[color=blue]index.jsp[/color]
<%@ 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>My JSP 'index.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="hello2.action" type="post">
请输入你的大名：<input type="text" name="uname" value="" /><br>
<input type="submit" value="确定" />
</form>
</body>
</html>
[color=blue]msg.jsp[/color]
<%@ 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>My JSP 'index.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>
${msg }
</body>
</html>
[color=blue]HelloAction2.java[/color]
package com.topnet.af.Action;
public class HelloAction2 {
private String uname;
private String msg;
public String sayHello() {
msg = "你好："+uname;
return "success";
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}
[color=blue]struts.xml配置文件[/color]
<?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>
<!-- 命名空间 -->
<package name="struts2" extends="struts-default">
<action name="hello2" class="com.topnet.af.Action.HelloAction2" method="sayHello">
<result name="success">/msg.jsp</result>
</action>
</package>
</struts>
启动Tomcat服务器，运行即可
两个jsp页面：index.jsp:用户输入你的名字。msg.jsp:输入您好，名字信息。
[color=blue]index.jsp[/color]
<%@ 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>My JSP 'index.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="hello2.action" type="post">
请输入你的大名：<input type="text" name="uname" value="" /><br>
<input type="submit" value="确定" />
</form>
</body>
</html>
[color=blue]msg.jsp[/color]
<%@ 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>My JSP 'index.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>
${msg }
</body>
</html>
[color=blue]HelloAction2.java[/color]
package com.topnet.af.Action;
public class HelloAction2 {
private String uname;
private String msg;
public String sayHello() {
msg = "你好："+uname;
return "success";
}
public String getUname() {
return uname;
}
public void setUname(String uname) {
this.uname = uname;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}
[color=blue]struts.xml配置文件[/color]
<?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>
<!-- 命名空间 -->
<package name="struts2" extends="struts-default">
<action name="hello2" class="com.topnet.af.Action.HelloAction2" method="sayHello">
<result name="success">/msg.jsp</result>
</action>
</package>
</struts>
启动Tomcat服务器，运行即可
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