struts不同session范围添加、访问属性

时间：2022-08-19 19:20:28

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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