Struts2学习笔记——入门

环境:MyEclipse 6.5 + Tomcat 6.29

Struts版本:struts-2.0.11

项目:登陆模拟

1、新建web项目:struts2

将struts2基本的支持包导入到lib下:

commons-logging-1.0.4.jar

freemarker-2.3.8.jar

ognl-2.6.11.jar

struts2-core-2.0.11.jar

xwork-2.0.4.jar

编写index.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags"%>
<html>
  	<head>
    <title>struts2 demo</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>
  		<s:form action="login">
  			<s:textfield label="username"></s:textfield>
  			<s:textfield label="password"></s:textfield>
  			<s:submit value="submit"></s:submit>
  		</s:form>
  	</body>
</html>

 在web.xml中添加struts2的filter:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	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_2_5.xsd">
	<filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
    </filter>

    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
  	<welcome-file-list>
    	<welcome-file>index.jsp</welcome-file>
  	</welcome-file-list>
</web-app>

 在src下新建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="userlogin" namespace="/" extends="struts-default">
		<action name="login" class="com.echo.action.LoginAction">
            <result name="success">/success.jsp</result>
        </action>
	</package>
</struts>

 新建Action:com.echo.action.LoginAction(可继承ActionSupport)

package com.echo.action;

public class LoginAction {
	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;
	}
	public String execute() throws Exception {
		return "success";
	}	
}

 新建返回页面success.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<html>
  	<head>
	    <title>struts2 - success</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>
    	username:${requestScope.username }<br/>
    	password:${requestScope.password }
  	</body>
</html>

 PS:struts默认的跳转方式是forward,所以都是在一个request范围呢。

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