Using Java sessions for login/logout -


having trouble getting session work in java application.

my login.jsp page calls loginaction page.

package struts.action; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse; import javax.servlet.http.httpsession; import org.apache.struts.action.actionform; import org.apache.struts.action.actionforward; import org.apache.struts.action.actionmapping;  import struts.form.loginform;  public class loginaction extends org.apache.struts.action.action { private final static string success = "success"; private final static string failure = "failure";      public actionforward execute(actionmapping mapping, actionform form, httpservletrequest request, httpservletresponse response) throws exception {         loginform lf = (loginform) form;         httpsession session = request.getsession(true);         if (lf.getusername().equals(lf.getpassword())) {              session.setattribute("username", lf.getusername());             system.out.println(session.getattribute("username"));             return mapping.findforward(success);          } else {             return mapping.findforward(failure);         }     } }

corresponding loginform page

package struts.form; import org.apache.struts.action.*;  public class loginform extends actionform{      private string username;     private string password;      public loginform() {         super();     }     private static final long serialversionuid = 104092268304152302l;      public string getusername() {     return username;     }      public void setusername(string username) {     this.username = username;    }      public string getpassword() {         return password;         }          public void setpassword(string password) {         this.password = password;        } }

success.jsp, page shown when logged in

<%@ 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" %> <%@ taglib uri="http://struts.apache.org/tags-tiles" prefix="tiles" %> <!doctype html public "-//w3c//dtd html 4.01 transitional//en"><%@page     language="java" contenttype="text/html; charset=iso-8859-1"     pageencoding="iso-8859-1"%> <html> <head> <title>success</title> <meta http-equiv="content-type" content="text/html; charset=iso-8859-1"> </head> <body> <h1>hello: <% session.getattribute("username"); %></h1>   <html:form action="/logoutaction" >         <html:submit value="logout" />  </html:form>  </body> </html>

logout action page package struts.action;

import javax.servlet.http.httpsession; import javax.servlet.http.httpservletrequest; import javax.servlet.http.httpservletresponse;  import org.apache.struts.action.actionform; import org.apache.struts.action.actionforward; import org.apache.struts.action.actionmapping;  public class logoutaction extends org.apache.struts.action.action {      private final static string success = "success";     private final static string failure = "failure";      @override     public actionforward execute(actionmapping mapping, actionform form, httpservletrequest request, httpservletresponse response)     throws exception {         httpsession session = request.getsession(true);         system.out.println(session.getattribute("username"));          try{             session.removeattribute("username");             session.invalidate();             return mapping.findforward(success);         }catch(exception ex){             system.out.println("error");         }     return mapping.findforward(failure);     } }

corresponding logoutform package struts.form; import org.apache.struts.action.*;

public class logoutform extends actionform{      private static final long serialversionuid = 1l;  }

so session created in login action, , works, if use getattribute() , print console, username comes up. however, username won't show on success.jsp page.

can help?

you forgot put =

<h1>hello: <%= session.getattribute("username"); %></h1>

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