一、struts2简介：
二、helloWorld：
1）工程结构：
HelloWorldAction.java:
package com.cy.action; import com.opensymphony.xwork2.Action; public class HelloWorldAction implements Action{ public String execute() throws Exception { System.out.println("执行了Action的默认方法"); return SUCCESS; } }
struts.xml配置文件：
<?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> <!-- 可以创建很多的package，用name来区分 --> <package name="helloWorld" extends="struts-default"> <action name="hello" class="com.cy.action.HelloWorldAction"> <!-- 默认是转发，转发到helloWorld.jsp --> <result name="success">helloWorld.jsp</result> </action> </package> </struts>
web.xml配置文件：
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"> <display-name>Struts2Chap01</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <filter> <filter-name>Struts2</filter-name> <!-- struts2的核心控制器 --> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <!-- /*拦截了所有的请求 --> <filter-mapping> <filter-name>Struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
helloWorld.jsp:
<body> struts2你好！！ </body>
2)测试结果：
浏览器中访问:http://localhost:8080/Struts2Chap01/hello
