为了让我们以后开发方便，我们需要配置struts.xml的dtd的头，这样在编写struts.xml文件中可以有提示！
操作如下：
（1）打开myeclipse→window→Preferences→输入xml→XML→XML Catalog→Add→点击File System找到struts-2.1.7.dtd文件→在Key:输入-//Apache Software Foundation//DTD Struts Configuration 2.0//EN→勾选Specify alternative web address→在复选框下的输入框输入：http://struts.apache.org/dtds/struts-2.0.dtd→ok→ok
1.创建如下项目目录结构
2.在WebRoot下窗前index.jsp文件
1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <%@taglib uri="/struts-tags" prefix="s" %> 3 <% 4 String path = request.getContextPath(); 5 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 6 %> 7 8 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 9 <html> 10 <head> 11 <base href="<%=basePath%>"> 12 13 <title>My JSP 'index.jsp' starting page</title> 14 <meta http-equiv="pragma" content="no-cache"> 15 <meta http-equiv="cache-control" content="no-cache"> 16 <meta http-equiv="expires" content="0"> 17 <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> 18 <meta http-equiv="description" content="This is my page"> 19 <!-- 20 <link rel="stylesheet" type="text/css" href="styles.css"> 21 --> 22 </head> 23 24 <body> 25 <h1> 26 <s:property value="message"/> 27 </h1> 28 <hr/> 29 <form action="helloWorld.action" method="post"> 30 用户名:<input type="text" name="user"/> 31 <input type="submit" value="提交" /> 32 </form> 33 34 </body> 35 </html>
3.在src包下创建struts.xml文件
步骤：选中src→new→XML(Basic Templates)→next→File name:struts.xml→next→勾选Create XML file from a DTD file→next→勾选Select XML Catalog entry →找到key为：-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN→next →finish
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN" 4 "http://struts.apache.org/dtds/struts-2.0.dtd"> 5 <struts> 6 <package name="default" namespace="/" extends="struts-default"> 7 <action name="helloWorld" class="com.action.HelloWorldAction"> 8 <result name="success">index.jsp</result> 9 </action> 10 </package> 11 </struts>
4.编辑WebRoot下的WEB-INF的web.xml文件
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app id="WebApp_9" 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"> 3 4 <filter> 5 <filter-name>struts2</filter-name> 6 <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> 7 </filter> 8 9 <filter-mapping> 10 <filter-name>struts2</filter-name> 11 <url-pattern>/*</url-pattern> 12 </filter-mapping> 13 14 <welcome-file-list> 15 <welcome-file>index.jsp</welcome-file> 16 </welcome-file-list> 17 18 </web-app>
5.在com.actin包下创建HelloWorldAction.java
1 package com.action; 2 3 import com.opensymphony.xwork2.Action; 4 5 public class HelloWorldAction implements Action { 6 private String user; //表单中name的属性值 7 private String message; //错误信息 8 9 public String execute() throws Exception { 10 this.setMessage("Hello,"+this.getUser()); 11 return "success"; 12 } 13 14 public String getUser() { 15 return user; 16 } 17 18 public void setUser(String user) { 19 this.user = user; 20 } 21 22 public String getMessage() { 23 return message; 24 } 25 26 public void setMessage(String message) { 27 this.message = message; 28 } 29 30 31 }
6.运行
