转: 一个完整的struts 2 Hello World程序(5)上
2.2??一个简单的HelloWorld
<?xml?version="1.0"?encoding="UTF-8"?>
<web-app?id="WebApp_ID"?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">????<filter>????????<!—?配置filter--?>????????<filter-name>struts2</filter-name>????????<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>????</filter>????<filter-mapping>????????????<!—拦截所有URL用户请求????????<filter-name>struts2</filter-name>????????<url-pattern>/*</url-pattern>????</filter-mapping>????<!—配置欢迎界面文件--?><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></web-app>
<?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"><!—配置struts2--><struts>????<!--?配置包，名称为bookcode??-->????<package?name="bookcode"?extends='struts-default'>????<!--?配置Action??-->????<action?name="HelloWorld"?class="ch2.helloworld.HelloWorld">????????????<!--?配置返回结果??-->????????????<result?name="success">/ch2/helloworld/success.jsp</result>????????????<result?name="error">/ch2/helloworld/error.jsp</result>????????</action>????</package>?</struts>
package?ch2.helloworld;
public?class?HelloWorld?{
????//定义msg属性????private?String?msg;????//msg的get方法
????public?String?getMsg()?{????????return?msg;
????}????//msg的set方法????public?void?setMsg(String?msg)?{????????this.msg?=?msg;????}????//Action的execute()处理方法????public?String?execute()?{????????//判断条件????????if?(getMsg().equals(""))?{????????????//显示错误信息????????????System.out.println("no?String?input!");????????????//返回错误结果????????????return?"error";????????}?else?{????????????//显示用户输入的信息????????????System.out.println(getMsg());????????????//返回一个处理成功结果????????????return?"success";????????}????}
}
?
