session problem

hi

i donot know much about session
i have maintained a session on my login page & i want to use it on other page for changing password

so what should i do for that please help me

thank you

A HttpSession is like a map that is available to you on any page the user visits. This means you can store the user id in the session when he/she logs in and have it available on a later page when the user wants to change the password.

thank you Jeanne for your reply

but i want to know how i can use it on my later pages in struts
if you have any tutorials for that then please send me the links

thank you one again

Of course. That's how a session works. The Struts specific way is to create a form bean in the session scope. Then your later actions/pages can access it.

thank you again for your reply actually i am now posting my code

my login page

<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
 
<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
<meta http-equiv="expires" content="now"> 
<meta http-equiv="pragma" content="no-cache"> 
<meta http-equiv="Cache-Control" content="no-cache">

<%
response.setHeader("Cache-Control","no-cache"); //HTTP 1.1
response.setHeader("Pragma","no-cache"); //HTTP 1.0
response.setDateHeader ("Expires", 0); //prevents caching at the proxy server
%>
<%
    //session.invalidate();
	session = request.getSession(true);
	//Integer salt = new Integer(hashingsalting.HashingSalting.generateIntSalt()); 
	String address=request.getRemoteAddr();
	session.setAttribute("address",address);
    //session.setAttribute("salt",salt);
    
%>
	
		<title>JSP for UserLoginForm form</title>
	</head>
	<script type="text/javascript" language="JavaScript">
<!-- Copyright 2002 Bontrager Connection, LLC

function getCalendarDate()
{
   var months = new Array(13);
   months[0]  = "January";
   months[1]  = "February";
   months[2]  = "March";
   months[3]  = "April";
   months[4]  = "May";
   months[5]  = "June";
   months[6]  = "July";
   months[7]  = "August";
   months[8]  = "September";
   months[9]  = "October";
   months[10] = "November";
   months[11] = "December";
   var now         = new Date();
   var monthnumber = now.getMonth();
   var monthname   = months[monthnumber];
   var monthday    = now.getDate();
   var year        = now.getYear();
   if(year < 2000) { year = year + 1900; }
   var dateString = monthname +
                    ' ' +
                    monthday +
                    ', ' +
                    year;
   return dateString;
} // function getCalendarDate()

function show_now(){
var my_day=new Date()
//var dt = new Date(\"Aug 16, 2005 05:55:00\");

var day_name=new Array(7);
day_name[0]="Sunday"
day_name[1]="Monday"
day_name[2]="Tuesday"
day_name[3]="Wednesday"
day_name[4]="Thursday"
day_name[5]="Friday"
day_name[6]="Saturday"
return  day_name[my_day.getDay()];
}
//-->
</script>

<body style=" background-color:#FFFFCC;">
	<html:form action="/userLogin" method="post" >
		
		<table >
<tr>
	<td>	
		<img src="images/lion4.gif"/>
	</td>
		<th rowspan="2" align="center">
			<font size="5"  face="Georgia, Arial" color="maroon"><br>Ministry of

Petroleum &  Natural Gas </font> <br/>
 			  <font size="4" face="Georgia, Arial" color="maroon">O&M Activity Monitoring system</font>
		</th>
</tr>
<tr>
		<td>
		
<script type="text/javascript" language="JavaScript"></script>

</td></tr>
		</table>
		<br/><br/><br/><br/>
		<center>
		<table border="1">
		<tr><td>username</td><td> <html:text property="username"  /><html:errors property="username" /><br/></td></tr>
		<tr><td>password </td><td> <html:password property="password"/><html:errors property="password"/><br/></td></tr>
		<tr><td colspan="2" align="center"><html:submit/><html:cancel/> </td></tr>
		</table>
		<br/><br/><br/><br/>
		<font size="2" align="center"  face="Georgia, Arial" color="maroon">Designed & Developed By NIC</font>
<img src="images/niclogo.gif"/>
			</center>

</html:form>
	</body>
</html>

now the page on which i want to change my password

<%@ page language="java" pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://struts.apache.org/tags-bean" prefix="bean"%> 
<%@ taglib uri="http://struts.apache.org/tags-html" prefix="html"%>
<%@ taglib uri="http://struts.apache.org/tags-logic" prefix="logic"%>
<%@page import="java.lang.*, java.util.*, java.math.*" %>
<logic:notPresent name="valid" scope="session">
	<% response.sendRedirect("userLogin.jsp?lg=expire"); %>
</logic:notPresent>
<logic:present name="valid">

<html> 
	<head>
	
		<title>JSP for ChangepasswdForm form</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 
<meta http-equiv="expires" content="now"> 
<meta http-equiv="pragma" content="no-cache"> 
<meta http-equiv="Cache-Control" content="no-cache"> 
<%
response.setHeader("Cache-Control","no-cache"); //HTTP 1.1
response.setHeader("Pragma","no-cache"); //HTTP 1.0
response.setDateHeader ("Expires", 0); //prevents caching at the proxy server
%>
	<%String user=request.getParameter("un"); %>

</head>
	<body style=" background-color:#FFFFCC;">
		 <% 
	response.setHeader("Expires", "Sat, 6 May 1995 12:00:00 GMT"); 
	response.setHeader("Cache-Control","no-cache"); 
	response.setHeader("Pragma","no-cache"); 
	response.setHeader("Cache-Control","no-store, no-cache, must-revalidate"); 
	response.addHeader("Cache-Control", "post-check=0, pre-check=0"); 
	response.setHeader("Cache-Control", "max-stale=0");  
%>

<html:form action="/changepasswd">
	<center>
		<font size="4"  face="Georgia, Arial" color="maroon">Change Password</font>
		<br/><br/><br/><br/>
		
			<table border="1" bordercolor="000000">
								<tr>
						<td colspan="2" align="center" class="user"><logic:present name="changed" scope="request">
								<font color="blue"><bean:write name="changed" scope="request" />
								</font>
								<br />
							</logic:present>
										  </td>
					</tr>
			
				<tr><td>old-password </td><td> <input type="password" name="oldpassword"/><html:errors property="oldpassword"/><br/></td></tr>
				<tr><td>new-password </td><td> <input type="password" name="newpassword"/><html:errors property="newpassword"/><br/></td></tr>
				<tr><td>retype-password </td><td> <input type="password" name="retypepassword"/><html:errors property="retypepassword"/><br/></td></tr>
				<tr><td colspan="2" align="center"><input type="submit" value="Submit"/><input type="submit" value="Cancel"/></td></tr>
			</table>
			</center>
		</html:form>
	</body>
</html>
</logic:present>

now i want to ask how can i use session on my action page some problem is there when i click on my changepassword.jsp it shows me userloggin page again

so please help me now

For the behavior you describe, "valid" is not present in the session. Where do you set it? In an action? Can you show that code? Can you confirm it is being called? (via a debug statement)

Thank you for your reply

my changepasswordaction code is

/*
 * Generated by MyEclipse Struts
 * Template path: templates/java/JavaClass.vtl
 */
package ams.action;

import java.sql.Connection;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import ams.database.database;
import ams.form.ChangepasswdForm;

/** 
 * MyEclipse Struts
 * Creation date: 03-06-2011
 * 
 * XDoclet definition:
 * @struts.action path="/changepasswd" name="changepasswdForm" input="/changepasswd.jsp" scope="request" validate="true"
 * @struts.action-forward name="failure" path="/changepasswd.jsp"
 * @struts.action-forward name="success" path="/passwdsuccess.jsp"
 */
public class ChangepasswdAction extends Action {
	/*
	 * Generated Methods
	 */

/** 
	 * Method execute
	 * @param mapping
	 * @param form
	 * @param request
	 * @param response
	 * @return ActionForward
	 */
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response) {
		ChangepasswdForm changepasswdForm = (ChangepasswdForm) form;// TODO Auto-generated method stub
		HttpSession session = request.getSession(false);
		System.out.println("Aditi");
		boolean update = false;
		String user = (String) session.getAttribute("valid");
		System.out.println("Aditi1");
		System.out.println(user);
		if(user==null)return mapping.findForward("failure");
		System.out.println("Aditi2");
		Connection conn=new database().getConnection();
		PreparedStatement st=null;
		PreparedStatement psat=null;
		try {
			String opasswd=changepasswdForm.getOldpassword().trim();
			String rpasswd=changepasswdForm.getRetypepassword().trim();
			String passwd=changepasswdForm.getNewpassword().trim();
			//return mapping.findForward("success");
			int a1=0;
			if((passwd.equals(rpasswd)) && !(opasswd.equals(passwd)) )
			{
			 psat=conn.prepareStatement("update ams_login set password=? where loginname=?;" );
			 psat.setString(1, changepasswdForm.getNewpassword().trim());
			 psat.setString(2, user);
			 //psat.setString(3, changepasswdForm.getOldpassword().trim());
			a1=psat.executeUpdate();
			if(a1==1)	
			return mapping.findForward("success");
			}
	   } 
		catch (SQLException e) 
		{// TODO Auto-generated catch block
			e.printStackTrace();
			return mapping.findForward("failure");
								}
		finally {
		      // Always close the database connection.
		      try {
		    	    if (conn != null) 
		    	    	conn.close();
		      }
		      catch (SQLException ignored){
		       
		    	  System.out.println(ignored);
		      }
		    }
		return mapping.findForward("failure");
	}
}

Please pardon me if there is any blunder mistake because i am just a fresher for session & i cant understand them completely

Please help me guys i need it badly for my project

please help me