源代码：
strust.xml
<?xml version="1.0" encoding="UTF-8" ?><!DOCTYPE struts PUBLIC"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"""><struts><constant name="struts.action.extension" value="action,do," /><constant name="struts.devMode" value="true" /><constant name="struts.enable.DynamicMethodInvocation" value="true" /><package name="default" namespace="/" extends="struts-default"><default-action-ref name="default" /><action name="test1" class="org.Test.action.TestAction1"method="test"><result>/success.jsp</result></action><action name="test2" class="org.Test.action.TestAction2"method="test"><result>/success.jsp</result></action><action name="default"><result>/index.jsp</result></action></package></struts>
success.jsp
<span style="font-size:18px;"><%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><title>成功</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>${requestScope.name}${sessionScope.name}${applicationScope.name}<br></body></html></span>
方法一：通过ActionContext来访问
TestAction1.java
package org.Test.action;import java.util.Map;import com.opensymphony.xwork2.ActionContext;import com.opensymphony.xwork2.ActionSupport;import com.opensymphony.xwork2.ModelDriven;public class TestAction1 extends ActionSupport { private Map<String, Object> request;private Map<String, Object> session;private Map<String, Object> application;public TestAction1() {this.request = (Map)ActionContext.getContext().get("request");this.session = (Map)ActionContext.getContext().getSession();this.application = (Map)ActionContext.getContext().getApplication();}public String test() {System.out.println("TestAction1:test");this.request.put("name", "张三");this.session.put("name", "李四");this.application.put("name", "王五");return SUCCESS;}}
运行结果：
说明：
1.TestAction1的
类中：定义Map类型的request,session,application对象
构造方法中：通过ActionContext获取这三个对象
test()方法中：用put方法设置属性
2.success.jsp：通过EL语言查看request,session,application对象的name属性的值
方法二：IOC(控制反转)，，通过实现接口RequestAware,SessionAware, ApplicationAware来访问
TestAction2.java
package org.Test.action;import java.util.Map;import org.apache.struts2.interceptor.ApplicationAware;import org.apache.struts2.interceptor.RequestAware;import org.apache.struts2.interceptor.SessionAware;import com.opensymphony.xwork2.ActionSupport;public class TestAction2 extends ActionSupport implements RequestAware,SessionAware, ApplicationAware {private Map<String, Object> request;private Map<String, Object> session;private Map<String, Object> application;@Overridepublic void setApplication(Map<String, Object> application) {this.application = application;}@Overridepublic void setSession(Map<String, Object> session) {this.session = session;}@Overridepublic void setRequest(Map<String, Object> request) {this.request = request;}public String test() {System.out.println("TestAction2:test");this.request.put("name", "小明");this.session.put("name", "小华");this.application.put("name", "小王");return SUCCESS;}}运行结果：如果心胸不似海，又怎能有海一样的事业。
