Stuts2学习——HelloWorld

　　这两天从对Struts一窍不通到成功运行HelloWorld，在SSH这条路上迈出了第一步。

　　下面我把我的第一个Struts程序放上来：

　　一、新建web project，配置文件等准备工作

　　1. 新建一个Web Project项目，这个不用多说了把。

　　2. 在WebRoot -> WEB-INF -> lib下导入jar包

　　3. 配置 web.xml、struts.xml、logging.properties文件

　　(1) 在WEBRoot -> WEB-INF 下新建web.xml，代码如下：　　

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
 3     xmlns="http://xmlns.jcp.org/xml/ns/javaee"  
 4     xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"  
 5     version="3.1">
 6   <display-name>TestStruts2</display-name>
 7   <welcome-file-list>
 8     <welcome-file>index.jsp</welcome-file>
 9   </welcome-file-list>
10   <filter>
11     <filter-name>Struts2</filter-name>
12     <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class>
13   </filter>
14   <filter-mapping>
15     <filter-name>Struts2</filter-name>
16     <url-pattern>/*</url-pattern>
17   </filter-mapping>
18 </web-app>

web.xml

　　(2) 在 src 下新建struts.xml，代码如下：

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE struts PUBLIC  
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN"  
 4     "http://struts.apache.org/dtds/struts-2.5.dtd">
 5 <struts>  
 6 <constant name="struts.enable.DynamicMethodInvocation" value="true"/>  
 7 <constant name="struts.devMode" value="true"></constant>  
 8     <package name="helloworld" namespace="/helloworld" extends="struts-default">  
 9         <global-allowed-methods>regex:.*</global-allowed-methods>  
10         <action name="hello" class="com.mike.struts.HelloWorldAction" method="execute">  
11             <result name="success">/pages/HelloWorld.jsp</result>  
12         </action>
13     </package>  
14 </struts>

struts.xml

　　(3) 在 src 下新建logging.properties，代码如下：

org.apache.catalina.core.ContainerBase.[Catalina].level = INFO
org.apache.catalina.core.ContainerBase.[Catalina].handlers =java.util.logging.ConsoleHandler

logging.properties

　　二、建立一个Action

　　代码如下：

 1 package com.mike.struts;
 2 
 3 public class HelloWorldAction {
 4     private String name;
 5 
 6     public String getName() {
 7         return name;
 8     }
 9 
10     public void setName(String name) {
11         this.name = name;
12     }
13     
14     public String execute() throws Exception {
15         return "success";
16     }
17     
18 }

HelloWorld.java

　　三、jsp界面代码

　　1. index.jsp

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%@ taglib prefix="s" uri="/struts-tags"%>
 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   </head>
20   
21   <body>
22       <form action="helloworld/hello">
23         <label for="name">Please enter your name:</label><br>
24         <input type="text" name="name"/>
25         <input type="submit" value="Say Hello!"/>
26     </form>
27   </body>
28 </html>

index.jsp

　　2. 在 WebRoot -> WEB-INF 下，新建一个 pages 文件夹用来存放其它jsp文件，

　　　在 pages 文件夹下，新建HelloWorld,jsp，代码如下：

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%@ taglib prefix="s" uri="/struts-tags"%>
 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 'HelloWorld.jsp' starting page</title>
14     
15     <meta http-equiv="pragma" content="no-cache">
16     <meta http-equiv="cache-control" content="no-cache">
17     <meta http-equiv="expires" content="0">    
18     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
19     <meta http-equiv="description" content="This is my page">
20   </head>
21   
22   <body>
23     Hello World!
24     <s:property value="name"/>
25   </body>
26 </html>