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Struts2 教程

第一个Struts程序  ---Hello World

第一步:  下载安装struts

1. 下载链接: http://archive.apache.org/dist/struts/binaries/

2. 从网站上下载的Struts2包含了二三十个库文件,但大多数是可选的,这里只需要struts2-blank-*.war里WEB-INF/lib的库文件。

    在Eclipse里 Window->Preferences->Java->Build Path->User Libraries 添加struts的user libraries(新建然后引入包)

3. 新建web工程,右键工程选择Build Path->Add Libraries,将之前建立的struts的user libraries引入。

4. 在工程的WEB-INF/web.xml中配置struts的拦截器

##注意填入的filter-class可能因为版本不同而有所不同

<!-- Struts2 配置 --> <filter> <filter-name>struts</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>

5. 配置struts.xml,配置要调用的action,如果直接建立在src目录下,部署时会自动发布到WEB-INF/classses目录

<?xml version="1.0" encoding="UTF-8"?><!DOCTYPE struts PUBLIC      "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"      "http://struts.apache.org/dtds/struts-2.3.dtd"> <struts><package name="struts" extends="struts-default"><action name="HelloWorld" class="tutorial.HelloWorld"><result>/HelloWorld.jsp</result></action></package></struts>

package类似于java的包机制,action对应于表单所填的的action=”FromAction”,这里的action运行后会转到HelloWorld.jsp

6. 编写action类,即tutorial.HelloWorld

package tutorial;import com.opensymphony.xwork2.ActionSupport;public class HelloWorld extends ActionSupport {    public final static String MESSAGE = "Struts2 is up and running ...";    private String message;    public String getMessage() {        return message;    }    public void setMessage(String message) {        this.message = message;    }    public String execute() throws Exception{        setMessage(MESSAGE);        return SUCCESS;    }    }

7. 编写jsp页面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><%@ taglib prefix="s" uri="/struts-tags" %><%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 Hello World Struts</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=http://www.mamicode.com/"styles.css">>-->  </head>    <body>    <h2><s:property value="message" /></h2> <br>  </body></html>

8. 部署运行,打开浏览器输入: http://localhost:8080/HelloWorldStruts/HelloWorld (tomcat默认8080端口)