一、jsp默認設置
1、當訪問的Action不存在時，頁面會顯示錯誤信息，可以通過配置默認Action處理用戶異常的操作；
2。配置方法：
在struts.xml文件中的下添加如下內容：
<default-action-ref name="index"></default-action-ref>
其中index為默認Action的name屬性值；
3、配置默認Action后，相應的namespace下不存在要訪問的Action時，自動跳轉到默認Action處理。
4、實例
web.xml:
<?xml version="1.0" encoding="UTF-8"?><web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee ; http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <welcome-file-list> <welcome-file>hello.jsp</welcome-file> </welcome-file-list> <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></web-app>
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.enable.DynamicMethodInvocation" value="false" /> <constant name="struts.devMode" value="false" /> <include file="example.xml"/> <package name="default" namespace="/" extends="struts-default"> <default-action-ref name="index" /> <action name="index"> <result type="redirectAction"> <param name="actionName">HelloWorld</param> <param name="namespace">/example</param> </result> </action> </package> --> <!-- Add packages here --> <constant name="struts.devMode" value="true" /> <constant name="struts.i18n.encoding" value="GBK"></constant> <package name="user" namespace="/" extends="struts-default"> <default-action-ref name="index"></default-action-ref> <action name="index"> <result>/index.jsp</result> </action> </package></struts>
index.jsp:
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <base href="<%=basePath%>" rel="external nofollow" > <title>Index</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0"> <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css" rel="external nofollow" > --> </head> <body> Welcome to Magci's BLOG!<br /> <a href="magci/magc" rel="external nofollow" >magci/magc</a><br /> <a href="mgc/magc/magci/123456" rel="external nofollow" >mgc/magc/magci/123456</a><br /> </body></html>
二、action默認設置轉發
<!-- 默認action --> <default-action-ref name="index" /> <action name="index"> <result type="redirectAction"> <param name="actionName">page_toIndex</param> <!-- <param name="namespace">/example</param> --> </result> </action> <action name="page_*" class="indexAction" method="{1}"> <result name="toIndex">/WEB-INF/jsps/index.jsp</result> <result name="toAdminLogin">/WEB-INF/jsps/admin/admin_login.jsp</result> <!-- ajax --> <result name="ajaxInsertOneCallback" type="json"> <param name="root">action</param> </result> </action>以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VeVb武林網。
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