Retrieving results for comparison in form based authentication with entitie

Question

Hi,Im developing an application using EJB3.0 and at the moment im working on a module involving user authentication.I work with the sun java system appserver 9.1 and netbeans 5.5.2 using the default toplink as the persistent provider.I have problems performing user based authentication.where am at is at shown below.I used a SLSB facade design pattern and created an entity from an existing database I built solely for the application (table name user_table). This is the code I have currently:
Entity
* UserTable.java
* Created on 31 March 2008, 16:06
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package Entities;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.Table;
* Entity class UserTable
* @author Ayo
@Entity
@Table(name = "user_table")
public class UserTable implements Serializable {
@Id
@Column(name = "user_id", nullable = false)
private Integer userId;
@Column(name = "username")
private String username;
@Column(name = "password")
private String password;
@Column(name = "user_type")
private String userType;
@Column(name = "access_level")
private String accessLevel;
@Column(name = "staff_id")
private Integer staffId;
@Column(name = "staff_type", nullable = false)
private String staffType;
@Column(name = "time_created")
private String timeCreated;
@Column(name = "time_modified")
private String timeModified;
@Column(name = "time_logged_in")
private String timeLoggedIn;
@Column(name = "time_logged_out")
private String timeLoggedOut;
@Column(name = "created_by")
private String createdBy;
/** Creates a new instance of UserTable */
public UserTable() {
* Creates a new instance of UserTable with the specified values.
* @param userId the userId of the UserTable
public UserTable(Integer userId) {
this.userId = userId;
* Creates a new instance of UserTable with the specified values.
* @param userId the userId of the UserTable
* @param staffType the staffType of the UserTable
public UserTable(Integer userId, String staffType) {
this.userId = userId;
this.staffType = staffType;
* Gets the userId of this UserTable.
* @return the userId
public Integer getUserId() {
return this.userId;
* Sets the userId of this UserTable to the specified value.
* @param userId the new userId
public void setUserId(Integer userId) {
this.userId = userId;
* Gets the username of this UserTable.
* @return the username
public String getUsername() {
return this.username;
* Sets the username of this UserTable to the specified value.
* @param username the new username
public void setUsername(String username) {
this.username=username;
* Gets the password of this UserTable.
* @return the password
public String getPassword() {
return this.password;
* Sets the password of this UserTable to the specified value.
* @param password the new password
public void setPassword(String password) {
this.password=password;
* Gets the userType of this UserTable.
* @return the userType
public String getUserType() {
return this.userType;
* Sets the userType of this UserTable to the specified value.
* @param userType the new userType
public void setUserType(String userType) {
this.userType = userType;
* Gets the accessLevel of this UserTable.
* @return the accessLevel
public String getAccessLevel() {
return this.accessLevel;
* Sets the accessLevel of this UserTable to the specified value.
* @param accessLevel the new accessLevel
public void setAccessLevel(String accessLevel) {
this.accessLevel = accessLevel;
* Gets the staffId of this UserTable.
* @return the staffId
public Integer getStaffId() {
return this.staffId;
* Sets the staffId of this UserTable to the specified value.
* @param staffId the new staffId
public void setStaffId(Integer staffId) {
this.staffId = staffId;
* Gets the staffType of this UserTable.
* @return the staffType
public String getStaffType() {
return this.staffType;
* Sets the staffType of this UserTable to the specified value.
* @param staffType the new staffType
public void setStaffType(String staffType) {
this.staffType = staffType;
* Gets the timeCreated of this UserTable.
* @return the timeCreated
public String getTimeCreated() {
return this.timeCreated;
* Sets the timeCreated of this UserTable to the specified value.
* @param timeCreated the new timeCreated
public void setTimeCreated(String timeCreated) {
this.timeCreated = timeCreated;
* Gets the timeModified of this UserTable.
* @return the timeModified
public String getTimeModified() {
return this.timeModified;
* Sets the timeModified of this UserTable to the specified value.
* @param timeModified the new timeModified
public void setTimeModified(String timeModified) {
this.timeModified = timeModified;
* Gets the timeLoggedIn of this UserTable.
* @return the timeLoggedIn
public String getTimeLoggedIn() {
return this.timeLoggedIn;
* Sets the timeLoggedIn of this UserTable to the specified value.
* @param timeLoggedIn the new timeLoggedIn
public void setTimeLoggedIn(String timeLoggedIn) {
this.timeLoggedIn = timeLoggedIn;
* Gets the timeLoggedOut of this UserTable.
* @return the timeLoggedOut
public String getTimeLoggedOut() {
return this.timeLoggedOut;
* Sets the timeLoggedOut of this UserTable to the specified value.
* @param timeLoggedOut the new timeLoggedOut
public void setTimeLoggedOut(String timeLoggedOut) {
this.timeLoggedOut = timeLoggedOut;
* Gets the createdBy of this UserTable.
* @return the createdBy
public String getCreatedBy() {
return this.createdBy;
* Sets the createdBy of this UserTable to the specified value.
* @param createdBy the new createdBy
public void setCreatedBy(String createdBy) {
this.createdBy = createdBy;
* Returns a hash code value for the object. This implementation computes
* a hash code value based on the id fields in this object.
* @return a hash code value for this object.
@Override
public int hashCode() {
int hash = 0;
hash += (this.userId != null ? this.userId.hashCode() : 0);
return hash;
* Determines whether another object is equal to this UserTable. The result is
* <code>true</code> if and only if the argument is not null and is a UserTable object that
* has the same id field values as this object.
* @param object the reference object with which to compare
* @return <code>true</code> if this object is the same as the argument;
* <code>false</code> otherwise.
@Override
public boolean equals(Object object) {
// TODO: Warning - this method won't work in the case the id fields are not set
if (!(object instanceof UserTable)) {
return false;
UserTable other = (UserTable)object;
if (this.userId != other.userId && (this.userId == null || !this.userId.equals(other.userId))) return false;
return true;
* Returns a string representation of the object. This implementation constructs
* that representation based on the id fields.
* @return a string representation of the object.
@Override
public String toString() {
return "Entities.UserTable[userId=" + userId + "]";
SLSB
* UserTableFacade.java
* Created on 31 March 2008, 16:07
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package Entities;
import java.util.*;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
* @author Ayo
@Stateless
public class UserTableFacade implements UserTableFacadeLocal {
@PersistenceContext
private EntityManager em;
/** Creates a new instance of UserTableFacade */
public UserTableFacade() {
public void create(UserTable userTable) {
em.persist(userTable);
public void edit(UserTable userTable) {
em.merge(userTable);
public void destroy(UserTable userTable) {
em.merge(userTable);
em.remove(userTable);
public List findAll() {
return em.createQuery("select Object(o)from UserTable as o").getResultList();
local interface
* UserTableFacadeLocal.java
* Created on 31 March 2008, 16:07
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
package Entities;
import java.util.*;
import javax.ejb.Local;
* @author Ayo
@Local
public interface UserTableFacadeLocal {
void create(UserTable userTable);
void edit(UserTable userTable);
void destroy(UserTable userTable);
List findAll();
controller servlet
* userCheck.java
* Created on 15 March 2008, 22:41
package servlets;
import Entities.UserTable;
import Entities.UserTableFacadeLocal;
import Entities.userValidationBean;
import Entities.userValidationRemote;
import java.io.*;
import java.util.Iterator;
import java.util.List;
import java.util.Collection;
import javax.servlet.*;
import javax.servlet.http.*;
import javax.ejb.*;
* @author Ayo
* @version
public class userCheck extends HttpServlet {
@EJB
private UserTableFacadeLocal userTableFacade;
UserTable u;
String userFellow;
String pass;
String username,password;
/** Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
* @param request servlet request
* @param response servlet response
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
/*con=null;
ps=null;
rs=null;
s=null;
*/response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
username=request.getParameter("username");
password=request.getParameter("password");
if(username==""||password=="")
showError("<b><font color=\"red\">Please fill in the required blanks.</font></b>",request,response);
else
List user=userTableFacade.findAll();
for(Iterator it=user.iterator();it.hasNext();)
u=(UserTable)it.next();
userFellow= u.getUsername();
pass=u.getPassword();
//out.println(" <b>"+elem.getTitle()+" </b><br />");
//out.println(elem.getBody()+"<br /> ");
//I used the following two lines to determing if im actually accessing the database and retrieving results, and I get all records in the table(usernames and passwords).
//BUT I NEED A SPECIFIC RECORD TO MATCH THE USERNAME AND PASSWORD FROM THE FORM AND IF IT DOES NOT MATCH,I REDIRECT TO THE ERROR PAGE.THAT'S WHERE IM STUCK.
out.println(userFellow);
out.println(pass);
/* if(username.equals(userFellow)&&password.equals(pass))
RequestDispatcher d=request.getRequestDispatcher("blah.jsp");
d.forward(request,response);
else
showError("<b><font color=\"red\">Invalid Login details!</font></b>",request,response);
private void showError(String errorMsg,HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException
request.setAttribute("error_msg",errorMsg);
RequestDispatcher dispatcher=request.getRequestDispatcher("admin_error.jsp");
dispatcher.forward(request,response);
// <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
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
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
processRequest(request, response);
/** Returns a short description of the servlet.
public String getServletInfo() {
return "Short description";
// </editor-fold>
I NEED HELP.ive been on this for 5 days and i cant seem to get a solution. I tried creating a method (private Collection findByUsername()) and(private Collection
findByPassword()) in the local interface that would supposedly return records based on input from the form but I got a null pointer and an ejb exception saying
unknown find method or something, as in ,or an error message that said i cant search records by name or something.I dont know. Or is it the query that is not
specific enough. I didnt seem to get the syntax right when i was trying to search by username and password.Please someone help me.
Ayo.

Answer 1

Hey everyone,
Is the question I posted that hard?
I even tried to just load a HTML <img src="picture.jpg"/> tag
on the login.jsp and even this won't show.
I'm thinking that the container, with the security mechanism, is blocking
styles and images???
Anyone...please help.
-Yuri