request,session,application 取值方法

時間 2019-12-19

標籤 request session application 取值方法欄目網站開發简体版

原文原文鏈接

JSP： html

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%@ taglib uri="/struts-tags" prefix="s"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

 <title>My JSP 'index.jsp' starting page</title>

</head>

<body>
 第一種方法 
 request :<s:property value="#request.msg"/> 
 session :<s:property value="#session.msg"/> 
 application :<s:property value="#application.msg"/> 
 第二種方法 
 request :${requestScope.msg} 
 session :${sessionScope.msg } 
 application :${requestScope.msg } 
</body>
</html> java

action: apache

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;

public class OGNLAction extends ActionSupport {
   private HttpServletRequest req;

   @Override
   public String execute() throws Exception {
          ActionContext context = ActionContext.getContext();
          Map request = (Map) context.get("request");
          Map session = context.getSession();
          Map appication = context.getApplication();

          request.put("msg", "requestMessage");
          session.put("msg","SessionMessage");
          appication.put("msg", "applitionMessage");
          return SUCCESS;
   }

} session

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