Struts2_访问或添加request等属性

忘是亡心i 2022-06-16 14:53 113阅读 0赞

<?xml version="1.0" encoding="UTF-8" ?>
 <!DOCTYPE struts PUBLIC
 	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 	"http://struts.apache.org/dtds/struts-2.3.dtd">
 
 <struts>
 	<package name="dd" namespace="/demo" extends="struts-default">
 		<action name="list_*" class="cn.itcast.f_action.HelloWorldAction"
 			method="{1}">
 			<result name="message">/WEB-INF/page/hello.jsp</result>
 		</action>
 	</package>
 </struts>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 
 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
 <head>
 
 <title>My JSP 'hello.jsp' starting page</title>
 
 <meta http-equiv="pragma" content="no-cache">
 <meta http-equiv="cache-control" content="no-cache">
 <meta http-equiv="expires" content="0">
 </head>
 
 <body>
 	${applicationScope.app }
 	 ${sessionScope.ses }
 	 ${requestScope.req}
 	 
 	========================================== 
 	<c:forEach items="${names }" var="name">
 		${name } 
 	</c:forEach>
 </body>
 </html>

package cn.itcast.f_action;
    
    import java.util.Arrays;
    
    import javax.servlet.ServletContext;
    import javax.servlet.http.HttpServletRequest;
    
    import org.apache.struts2.ServletActionContext;
    
    import com.opensymphony.xwork2.ActionContext;
    
    public class HelloWorldAction {
    
    	public String execute() {
    		ActionContext act = ActionContext.getContext();
    		act.getApplication().put("app", "应用范围");// 往ServletContext里放入app
    		act.getSession().put("ses", "session范围");// 往Session里放入ses
    		act.put("req", "request范围");// 往request里放入req
    		act.put("names", Arrays.asList("小明", "小刚", "小红"));// 表单标签
    		return "message";
    	}
    
    	public String rsa() {
    		HttpServletRequest request = ServletActionContext.getRequest();
    		ServletContext servletContext = ServletActionContext.getServletContext();
    		request.setAttribute("req", "请求范围属性");
    		request.getSession().setAttribute("ses", "会话范围属性");
    		servletContext.setAttribute("app", "应用范围属性");
    		return "message";
    	}
    }