Struts2中的全局result_学习专用

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Struts2中的全局result

2010-01-31 14:07

1.当多个Action使用同一个result时，可以使用<global-results>标签配置全局result；
2.当Action返回的字符串没有相应的result，Struts2会在package中查找全局result；
3.如果需要使用其他package或者通过<include>标签引用的其他xml文件中的全局result，则需要通过package中的extends属性指定继承的package。

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">

    <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>
     -->

<constant name="struts.devMode" value="true" />
    <constant name="struts.i18n.encoding" value="GBK"></constant>
     <package name="user" namespace="/user" extends="struts-default">
         <global-results>
             <result name="index">/mgc.jsp</result>
         </global-results>
        <action name="user" class="cn.edu.ahau.mgc.struts2.action.UserAction">
            <result>/addSuccess.jsp</result>
            <result name="error">/addError.jsp</result>
        </action>
    </package>

     <package name="admin" namespace="/admin" extends="user">
        <action name="admin" class="cn.edu.ahau.mgc.struts2.action.AdminAction">
            <result>/addAdminSuccess.jsp</result>
            <result name="error">/addAdminError.jsp</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() {
        if (userName == null || "".equals(userName)) {
            return ERROR;
        }
        else if ("magci".equals(userName)) {
            return "index";
        }
        return SUCCESS;
    }

    public String getUserName() {
        return this.userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

}

AdminAction.java:

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

import com.opensymphony.xwork2.ActionSupport;

public class AdminAction extends ActionSupport {

}

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>Global</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">
    
</head>

<body>
      User:<br />
    <form action="user/user!add" method="post">
        UserName: <input type="text" name="userName" />
        <input type="submit" value="Submit" />
    </form>

    Admin:<br />
    <form action="admin/admin!add" method="post">
        UserName: <input type="text" name="userName" />
        <input type="submit" value="Submit" />
    </form>
</body>
</html>

mgc.jsp:

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+"/";
%>

addError.jsp:

addAdminSuccess.jsp:

addAdminError.jsp:

类别：Struts2|

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