接口转发和重定向区别(三)
我们就一起来简单学习一下Action的4种Result type类型,分为:dispatcher(服务端页面跳转);redirect(客户端页面跳转);chain(动作链跳转);redirectAction(客户端Action跳转),当然还有其他类型,这里我们就以这四种为例为大家介绍一下,其他几种大家有兴趣单独学习。下面我们一起来看一下上面四种的具体实现,首先是我们的配置文件:
<package name="resultFilter" namespace="/resultFilter" extends="struts-default">
<!-- http://localhost:8080/Struts/resultFilter/default -->
<action name="default" class="com.edu.action.ResultFilter">
<result name="success">/default.jsp</result>
</action>
<!-- http://localhost:8080/Struts/resultFilter/dispatcher 服务端跳转-->
<action name="dispatcher" class="com.edu.action.ResultFilter" method="Dispatcher">
<result name="success" type="dispatcher">/dispatcher.jsp</result>
</action>
<!-- http://localhost:8080/Struts/resultFilter/redirect 客户端跳转 -->
<action name="redirect" class="com.edu.action.ResultFilter" method="Redirect">
<result name="success" type="redirect">/redirect.jsp</result>
</action>
<!-- http://localhost:8080/Struts/resultFilter/chain 动作链跳转-->
<!-- http://blog.****.net/randomnet/article/details/8656759 -->
<action name="chain" class="com.edu.action.ResultFilter" method="Chain">
<result name="success" type="chain">chain1</result>
</action>
<action name="chain1" class="com.edu.action.ResultFilter" method="Chain">
<result name="success">/chain.jsp</result>
</action>
<!-- http://localhost:8080/Struts/resultFilter/redirectAction 客户端跳转-->
<action name="redirectAction" class="com.edu.action.ResultFilter" method="RedirectAction">
<result name="success" type="redirectAction">
<param name="namespace">/redirectAction</param>
<param name="actionName">default</param>
</result>
</action>
<!-- http://localhost:8080/Struts/resultFilter/redirectAction 客户端跳转(单值传参)-->
<action name="redirectAction" class="com.edu.action.ResultFilter" method="RedirectAction">
<result name="success" type="redirectAction">
<param name="namespace">/redirectAction</param>
<param name="actionName">default?value1=${value1}</param>
</result>
</action>
<!-- http://localhost:8080/Struts/resultFilter/redirectAction 客户端跳转(多值传参)-->
<action name="redirectAction" class="com.edu.action.ResultFilter" method="RedirectAction">
<result name="success" type="redirectAction">
<param name="namespace">/redirectAction</param>
<param name="actionName">default</param>
<param name="value1">${value1}</param>
<param name="value2">${value2}</param>
</result>
</action>
</package>
<package name="redirectAction" namespace="/redirectAction" extends="struts-default">
<action name="default" class="com.edu.action.ResultFilter">
<result name="success">/redirectAction.jsp</result>
</action>
</package>
default action我们并没有设置result的type类型,系统默认设置为:dispatcher类型,dispatcher类型和redirect下只能跳转到页面,两者的区别在于,dispatcher类型属于服务端调转,地址栏不更新,redirect属于客户端跳转,地址栏会更新。chain类型属于动态链跳转,故我们在第二个Action中任然可以拿到传递给第一个Action的参数,我们可以在页面上添加<s:debug></s:debug>来查看具体信息。最后一个redirectAction大家一看配置一定已经明白了,这里就不再赘述。下面我们看一下chain动态链跳转,首先看一下我的jsp页面:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<%@taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>Result类型跳转</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">
-->
</head>
<body>
result的chain跳转类型
<s:debug></s:debug>
</body>
</html>
运行我们的工程,打开debug: