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struts不同session范围添加、访问属性

第01步：编写bean类

package com.self.bean;

import java.util.Date;

public class User {
    private Date birthday = null;

    public Date getBirthday() {
        System.out.println("获得-User：" + birthday);
        return birthday;
    }

    public void setBirthday(Date birthday) {
        System.out.println("设置-User：" + birthday);
        this.birthday = birthday;
    }

}

第02步：编写action类

package com.self.action;

import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionContext;
import com.self.bean.User;

public class ThreeScopes {

    private User lilan;

    public ThreeScopes() {
    }
    
    /**向3种范围加入值**/
    public String showdata() {
        /**方式01**/
        ActionContext ac= ActionContext.getContext();
        ac.put("request", "请求范围01");//向request范围加入值
        ac.getSession().put("session", "会话范围01");//向Session范围加入值
        ac.getApplication().put("app", "应用范围01");//向应用范围加入值
        
        /**方式02**/
        ServletContext sc=ServletActionContext.getServletContext();//应用范围
        HttpServletRequest request=ServletActionContext.getRequest();//会话范围
        request.setAttribute("request2", "请求范围2");
        request.getSession().setAttribute("session2", "会话范围2");
        sc.setAttribute("app2", "应用范围2");
        return "tsuccess";
    }

    public User getLilan() {
        return lilan;
    }

    public void setLilan(User lilan) {
        this.lilan = lilan;
    }

}

第03步：配置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.action.extension" value="do"/>
    
    <package name="transform" namespace="/" extends="struts-default">
        <action name="list_*" class="com.self.action.ThreeScopes" method="{1}">
            <result name="tsuccess">
                /outdata.jsp
            </result>
        </action>
    </package>
</struts>

第04步：编写访问action界面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
  <body>
      <form action="list_showdata.do">
          <BR>
          <input type="submit" value="访问action，显示结果">
      </form>
  </body>
</html>

第05步：编写数据显示界面

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<html>
  <body>
      访问不同范围属性值01：<BR>
    ${applicationScope.app }<BR>
    ${sessionScope.session }<BR>
    ${requestScope.request }<BR><BR><BR>
      访问不同范围属性值02：<BR>
    ${applicationScope.app2 }<BR>
    ${sessionScope.session2 }<BR>
    ${requestScope.request2 }<BR>
  </body>
</html>

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原文地址：https://www.cnblogs.com/zjsy/p/4293578.html