SaveToken

[pankaj semwal]

Hi List[],

I have login page on submitting the login page and after validating the username and password its open main page.

In main page when i press the back button its still resubmit the values of login page.
But i only want the page should submit once time.

Please help me .

Below is my code
Action Class

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

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
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 com.yourcompany.struts.form.LoginForm;

/** 
 * MyEclipse Struts
 * Creation date: 02-03-2009
 * 
 * XDoclet definition:
 * @struts.action path="/login" name="loginForm" input="/form/login.jsp" scope="request" validate="true"
 * @struts.action-forward name="sucess" path="a.jsp"
 */
public class LoginAction 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) {
		LoginForm loginForm = (LoginForm) form;// TODO Auto-generated method stub
		
		PreparedStatement ps=null;
	   ResultSet rs=null;
		String target=new String();
	   try
		{
		Class.forName("oracle.jdbc.driver.OracleDriver");
Connection	con = DriverManager
				.getConnection("Jdbc:Oracle:thin:@localhost:1521:semwal",
						"scott", "tiger");
    	String sql= "  select * from emp where empno=?  and ename=? ";
    	 ps=con.prepareStatement(sql);
    	  
    	 ps.setString(1, loginForm.getName());
    	 ps.setString(2, loginForm.getPassword());
		  rs=ps.executeQuery();
		  
		  if(rs.next())
		  {
			  this.saveToken(request);
			  target="sucess";
		  System.out.println("valid");
		  
		  }
		 
		  else
		  {
			 
		  System.out.println("Invlaid");
		  }
		  if(this.isTokenValid(request))
				  {
			  resetToken(request);
				  }
		  else if(!this.isTokenValid(request))
		  {
			 System.out.println("ReSubmitFomr"); 
		  }
		  
		}catch (Exception e) {
			e.printStackTrace();
		}
		return mapping.findForward(target);
	}
}

[Nishan Patel]

Hi,

You just check session at your login page that session is registered your user value.

If yes ? --> then forward to your location jsp
if not ? --> then not to do any thing..

just like this

<s:if test="#session.user == user">
<jsp:forward page="/pages/homePage.jsp" />
</s:if>


This will automatically redirect to you homePage.jsp if you are login and your session is registered.