http://hi.baidu.com/hjayxhuvtzfpuvr/item/e93958db617a5a16e1f46ffb

 

1.使用redirect类型的result通过URL传递参数，也可以使用${属性名}动态设置参数；
2.在JSP中使用<s:property value="#parameters.属性名"/>显示接收的参数；
3.通过redirect类型的result传递的参数，不能使用<s:property value="属性名"/>显示接收的参数；
    因为redirect不通过Action，ValueStack为空，只能从#parameters中取得参数；

实例：

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">
        <action name="user" class="cn.edu.ahau.mgc.struts2.action.UserAction">
            <result type="redirect">/addSuccess.jsp?userName=${userName}</result>
        </action>
    </package>
</struts>

 


UserAction.java:

package cn.edu.ahau.mgc.struts2.action;

import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {

    private String userName;
    
    public String add() {
        return SUCCESS;
    }
    
    public String getUserName() {
        return this.userName;
    }
    
    public void setUserName(String userName) {
        this.userName = userName;
    }

}

 

index.jsp:

<%@ page language="java" 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%>">
    
    <title>ResultParam</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>
      User:<br />
    <form action="user!add" method="post">
        UserName: <input type="text" name="userName" />
        <input type="submit" value="Submit" />
    </form>
</body>
</html>

 


addSuccess.jsp:

<%@ page language="java" pageEncoding="GB18030"%>
<%@ taglib uri="/struts-tags" prefix="s" %>
<%
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%>">
    
    <title>Dynamic</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>
    User Add Success! <br />
      UserName:<s:property value="userName"/><br />
      UserName:<s:property value="#parameters.userName"/>
      <s:debug></s:debug>
</body>
</html>