Problem with JSPs in web application

Hi all
I am developing a web application that manages the data of employees
The following are the jsp files that I am using

Index.jsp(login details )

The Servlet for the above JSP LoginServlet

package com;
import javax.servlet.RequestDispatcher;
import java.sql.*;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.PreparedStatement;
/**
 *
 * @author Administrator
 */
public class LoginServlet extends HttpServlet
 {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    /**protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /* TODO output your page here
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet LoginServlet</title>");  
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet LoginServlet at " + request.getContextPath () + "</h1>");
            out.println("</body>");
            out.println("</html>");
            
        } finally { 
            out.close();
        }
    }

// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

/** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */

@Override
    public void doPost(HttpServletRequest request, HttpServletResponse response)
    {
        try{
            
        PrintWriter out = response.getWriter();
         DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
         Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();
         Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","ni","ni");
         String uname=request.getParameter("username");
         String upass=request.getParameter("userpassword");
        PreparedStatement pstmt=conn.prepareStatement("Select * from LOGIN where username=? and password=?");
        pstmt.setString(1, uname);
        pstmt.setString(2, upass);
       ResultSet rs=pstmt.executeQuery();
        if(rs.next())
        {
            RequestDispatcher view = request.getRequestDispatcher("/FirstLinkPage.jsp");
            view.forward(request, response);
        }
        
 else{
      RequestDispatcher view = request.getRequestDispatcher("/InvalidUserPage.jsp");
            view.forward(request, response);
  
        //processRequest(request, response);
    }
        }
       catch(Exception e)
            {
      System.out.println( e);

}
    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
   /** @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
*/
}
}

The above code is working without any errors ,On successful login it takes me to the FirstLinkPage and on invalid login it takes me to the InvalidUserPage.

FirstLinkPage.jsp

InvalidUserPage.jsp

Other jsps that I am using

CreateEmployeePage.jsp

ModifyEmployeePage.jsp

My web.xml is

The Problem

1)The problem that I face here is when I click the link on highlighted link in InvalidUserPage ,I get a page called Welcome.jsp with the two text boxes namely username and password .The password text box has its type as Text and not as password.
2)I don’t know how I got this page

Because I have created only the following JSPs and NOT a JSP called Welcome.jsp
CreateEmployeePage.jsp
Index.jsp
ModifyEmployeePage.jsp
FirstLinkPage.jsp
InvalidUserPage.jsp
3) Whenever I get back to the index jsp by clicking the link on FirstLinkPage jsp, the password text box type is changed to text(making the password visible) .when I give the correct login details after this it goes to Welcome.jsp
Can anyone please help me find a solution to this problem ,Thank you in advance

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>JSP Page</title>
</head>
<body>
<h1>OOPS!!! You seem to have entered invalid login credentials try again</h1>
<a > Click here to go back to the login page</a>

</body>
</html>

I doubt, whether you get any highlighted link in InvalidUserPage.jsp, because here there no href only, are you sure, you have posted the correct code...

Thank you for the reply Mr.Prasad Krishnegowda,

Sorry for the inconvenience,i didn't take notice of that part , but my jsp already has a href parameter in the anchor tag , when i paste my code here in javaranch the href attribute is removed ,i dont know the reason

The tag in my InvalidUser.jsp has href attribute as

The First tag in my FirstLinkPage has href attribute as

The Second tag in my FirstLinkPage has href attribute as

The Third tag in my FirstLinkPage has href attribute as

When you click on highlighted link, in InvalidUser.jsp, are you sure, you will get welcome.jsp and not index.jsp, because even index.jsp displays you two text boxes... what you see in the url, index or welcome.jsp?

If I click the link in the InvalidUserPage ,the resulting page has the URL index.jsp and the password textbox has now become an ordinary textbox(the password i enter is now visible).
even if i enter an invalid userid password,it takes me to another page with the URL Welcome.jsp .

In all the href in jsp's remove the /, just give the filename like index.jsp and try..

Hi,
I tried as you said but after removing the '/' when i click the login page link in the InvalidUserPage

i am getting the 404 error com/index.jsp is not available

where is your login.jsp located, inside WEB-INF or WEB-INF/com. can you post your directory structure here...

sure,

I have attached directory structure screen shot with this reply,please do refer the attachment and give me your suggestions.

nidhivel raja wrote: when i paste my code here in javaranch the href attribute is removed ,i dont know the reason

This has happened to me as well. I think it's a security feature on these forums to help prevent cross-site scripting, etc. If you could, please edit your original post by placing all "<" and ">" with "<" and ">" for all the link tags:

It seems like older versions of your files exist in your deployment environment. Try doing a clean build and then re-deploying your application.

Thank you , for the suggestions Mr.Michael Angstadt

It seems like older versions of your files exist in your deployment environment. Try doing a clean build and then re-deploying your application.

I did as you said but i am facing the same problem.I even created a new web application but the problem with the welcome page and the text box exists ,Is there any other solution for this problem

when your application takes you to welcome.jsp, click on view source and see the code is matching which jsp or not matching with any jsp at all..

Hi ,
Sure,
I viewed the source code of the Welcome.jsp,it is the same as another webpage in a different application with the name Welcome.jsp,

The following is the code of the Welcome.jsp

As an alternative, I have deleted the other applications and right now i have created a very simple web app with just three jsp
pages

1)index.jsp
2)WrongUser.jsp
3)Home.jsp
4)LoginServletThree

index.jsp

WrongUser.jsp

Home.jsp

LoginServletThree

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package com;

import javax.servlet.RequestDispatcher;
import java.sql.*;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.sql.PreparedStatement;
/**
 *
 * @author Administrator
 */
public class LoginServletThree extends HttpServlet {
   
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try {
            /* TODO output your page here
            out.println("<html>");
            out.println("<head>");
            out.println("<title>Servlet LoginServletThree</title>");  
            out.println("</head>");
            out.println("<body>");
            out.println("<h1>Servlet LoginServletThree at " + request.getContextPath () + "</h1>");
            out.println("</body>");
            out.println("</html>");
            */
        } finally { 
            out.close();
        }
    }

// <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    }

/** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        try{

PrintWriter out = response.getWriter();

DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());

Class.forName("oracle.jdbc.driver.OracleDriver").newInstance();

Connection conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:XE","nidhi","nidhi");

String uname=request.getParameter("username");

String upass=request.getParameter("userpassword");

PreparedStatement pstmt=conn.prepareStatement("Select * from LOGIN where username=? and password=?");

pstmt.setString(1, uname);

pstmt.setString(2, upass);

ResultSet rs=pstmt.executeQuery();

if(rs.next())
        {
            RequestDispatcher view = request.getRequestDispatcher("/Home.jsp");
            view.forward(request, response);

}

else{
      RequestDispatcher view = request.getRequestDispatcher("/WrongUser.jsp");
            view.forward(request, response);

//processRequest(request, response);
    }
        }

catch(Exception e)
            {

System.out.println( e);

}
    /**
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
   /** @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
*/
    }

/** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}

The above servlet works fine when i run the webapp ,the Welcome page didnot appear this time(THANKS A LOT for your suggestions

) ,but when i the click the login page link in Home page and the Wronguser page i get a blank page instead of the index page(but the URL is /index.jsp) ......can you please give me a solution for this?

Is it just a blank page or page not found exception?.. also, check the server logs, to see what it is showing..

Hi,
I checked the server Tomcat Server 6.0 Log,its not showing any errors,but in the server window ,i got the following exception before startup

SEVERE: [b]Error starting static Resources[/b]
[b]java.lang.IllegalArgumentException[/b]: Document base C:\Documents and Settings\Administrator.SYS-2558405F0E6\My Documents\NetBeansProjects\WebApplication2_2\build\web does not exist or is not a readable directory
        at org.apache.naming.resources.FileDirContext.setDocBase(FileDirContext.java:141)
        at org.apache.catalina.core.StandardContext.resourcesStart(StandardContext.java:3957)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4126)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:525)
        at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:626)
        at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:553)
        at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:488)
        at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1147)
        at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:311)
        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
        at org.apache.catalina.core.StandardHost.start(StandardHost.java:719)
        at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
        at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:443)
        at org.apache.catalina.core.StandardService.start(StandardService.java:516)
        at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
        at org.apache.catalina.startup.Catalina.start(Catalina.java:578)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:288)
        at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:413)
Jun 30, 2010 6:47:37 PM org.apache.catalina.core.StandardContext start
SEVERE: Error in resourceStart()
Jun 30, 2010 6:47:37 PM org.apache.catalina.core.StandardContext start
SEVERE: Error getConfigured
Jun 30, 2010 6:47:37 PM org.apache.catalina.core.StandardContext start
SEVERE: Context [/WebApplication2_2] startup failed due to previous errors
Jun 30, 2010 6:47:37 PM org.apache.catalina.core.StandardContext stop
INFO: Container org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/WebApplication2_2] has not been started
Jun 30, 2010 6:47:38 PM org.apache.catalina.loader.WebappClassLoader validateJarFile
INFO: validateJarFile(C:\Documents and Settings\Administrator.SYS-2558405F0E6\My Documents\NetBeansProjects\WebApplication3\build\web\WEB-INF\lib\javaee-api-6.0.jar) - jar not loaded. See Servlet Spec 2.3, section 9.7.2. Offending class: javax/servlet/Servlet.class
Jun 30, 2010 6:47:39 PM org.apache.catalina.core.StandardContext addApplicationListener
INFO: The listener "listeners.ContextListener" is already configured for this context. The duplicate definition has been ignored.
Jun 30, 2010 6:47:39 PM org.apache.catalina.core.StandardContext addApplicationListener
INFO: The listener "listeners.SessionListener" is already configured for this context. The duplicate definition has been ignored.
Jun 30, 2010 6:47:40 PM org.apache.coyote.http11.Http11Protocol start
INFO: Starting Coyote HTTP/1.1 on http-8082
Jun 30, 2010 6:47:40 PM org.apache.jk.common.ChannelSocket init
INFO: JK: ajp13 listening on /0.0.0.0:8009
Jun 30, 2010 6:47:40 PM org.apache.jk.server.JkMain start
INFO: Jk running ID=0 time=0/78  config=null
Jun 30, 2010 6:47:40 PM org.apache.catalina.startup.Catalina start
INFO: [b]Server startup in 3946 ms[/b]

Any idea what is the reason for this error?

Hi Mr.Prasad Krishnegowda& Mr.Michael Angstadt ,

The Problem is solved ,I tried replacing the existing anchor tags with the following attributes,

and it works !!!

Thanks a lot for spending your time in helping me to solve my problem

you are welcome.. glad you figured out, and it worked..

Also, thank you for posting the worked out solution here..

Good to hear!

Michael Angstadt wrote:Good to hear!

The same to me!