MyEclipse下搭建第一个Struts2程序

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Struts2

Myeclipse JSP Struts Tomcat Apache

要使用Struts2，首先到官网(http://struts.apache.org/)下载个，最好把lib、doc、apps、src全部down下来,这里是以Struts2.2.1.1为例.
先把Struts2的lib解压到一个地方,打开一看里面有几十个jar包,其实示例应用并不需要这么多,这只需要以下的这几个就OK了

可能你会发现lib下面没有javassist-3.7.ga.jar这个包,把apps解压到一个地方,把struts2-blank.war放到tomcat的webapps下面,开启tomcat,在webapps下打开struts2-blank\WEB-INF\lib，这里有你想要的jar包.

   准备工作做好了，现在正式开始:
       一、在MyEclipse下新建一个Web Project,将struts2-blank\WEB-INF\lib下的全部jar包copy到新建项目的WebRoot/WEB-INF/lib下面.

       二、在WebRoot下面新建一个login.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>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" method="post"> 
    	用户名: <input name="username" type="text"><br>
    	密  码: <input name="password" type="password"><br>
    	<input type="submit" value="submit">
    	<input type="reset" value="reset">
    </form>
  </body>
</html>

三、配置web.xml文件

<?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>
	  	<!-- 过滤调度器 -->
	  	<filter-class>
	  		org.apache.struts2.dispatcher.FilterDispatcher
	  	</filter-class>
	  </filter>
  	
  	 <filter-mapping>
  	 	<filter-name>struts2</filter-name>
  	 	<!-- 过滤所有请求 -->
  	 	<url-pattern>/*</url-pattern>
  	 </filter-mapping>
  	 
	  <welcome-file-list>
	    <welcome-file>index.jsp</welcome-file>
	  </welcome-file-list>
</web-app>

四、在src下新建一个LoginAction的Class


public class LoginAction {
	// 对应表单上的属性
	private String username;
	private String password;

	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;
	}
	
	/**
	 * Action中必须有execute方法
	 * @return
	 * @throws Exception
	 */
	public String execute() throws Exception {
		return "success";
	}
}

五、在src下新建struts2的配置文件struts.xml

<?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="czc.action.LoginAction">
			<!-- result的name属性默认名字是success -->
			<result name="success">/result.jsp</result>
		</action>
	</package>
</struts>

六、在WebRoot下面新建一个result.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>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>
    	用户名: ${requestScope.username}<br>
    	密码: ${requestScope.password}
  </body>
</html>

到此编码工作就完成了，下面就来看下效果