Struts 2.x基本环境搭建
就像初学java一样，依旧写一个hello world，不过这个是通过struts2来控制它如何显示在页面上。
软件环境：jdk 6.0 , tomcat 6.0, struts 2.3.12。
1. 从strut2s官网http://struts.apache.org/development/2.x/index.html 来下载 struts 2.3.12的 相关文件，包括完整的压缩包、应用示例、文档、依赖库、源代码等。如下图所示：
2. 新建一个web工程，打开struts-2.3.12-apps.zip将其中的struts2-blank.war下的lib中的jar包放到工程lib中，或者将其引入工程。
3. 现在我们捋顺我们的思路：
1) 创建一个存储welcome信息的类；
2) 创建展现该message的页面HelloWorld.jsp;
3) 创建用于一个用于控制用户、model层、view层三者交互的action类；
4) 创建配置文件struts.xml来映射view层与action类使之关联起来；
4. 代码实现：
1)model类:
package com.hsy.struts2;
public class MessageStore
{
private String message;
public MessageStore()
{
super();
this.setMessage("[struts2 test]: hello world!");
}
public String getMessage()
{
return message;
}
public void setMessage(String message)
{
this.message = message;
}
}
2) HelloWorld.jsp
<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Hello World!</title>
</head>
<body>
<h2><s:property value="messageStore.message" /></h2>
</body>
</html>
3)Action类
package com.hsy.struts2;
import com.opensymphony.xwork2.ActionSupport;
public class HelloWorldAction extends ActionSupport
{
private static final long serialVersionUID = 1L;
private MessageStore messageStore;
public MessageStore getMessageStore()
{
return messageStore;
}
public void setMessageStore(MessageStore messageStore)
{
this.messageStore = messageStore;
}
public String execute() throws Exception
{
messageStore = new MessageStore();
return SUCCESS;
}
}
4)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>
<constant name="struts.devMode" value="true" />
<package name="basicstruts2" extends="struts-default">
<action name="index">
<result>/index.jsp</result>
</action>
<action name="hello" class="com.hsy.struts2.HelloWorldAction" method="execute">
<result name="success">/HelloWorld.jsp</result>
</action>
</package>
</struts>
5) 在index.jsp中创建URL Action
<%@ page language="java" contentType="text/html;charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="s" uri="/struts-tags" %> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Basic Struts 2 Application - Welcome</title> </head> <body> <h1>Welcome To Struts 2!</h1> <p><a href="<s:url action='hello'/>">Hello World</a></p> </body> </html>
6) web.xml中配置
<?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">
<display-name>Struts Blank</display-name>
<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</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>