Using jsp to connect SavingAccount tutorial example

Question

Hello
I have a question on the tutorial i do not know if this is the right place but here it is
I tried to change the SavingAccount EJB (j2eettutorial exmple chapter 24)and add a Web client to it. I modified the JSP which was used in the converter exmple to use savingsAccount Ejbs.
I have spent a week on this simple example, it compiles, and deployed without a problem but when i run it on the browser it says error 404 the page does not exist.
the exmple is only one Bean with two interfaces and one jsp page called index.jsp I am going mad, started to panic there is nothing wrong still why it does not work.
I packaged the bean and used /context root for jsp imported the bean in jsp give the resource ref inside the jsp ...
I do not understand what is the mestray behind this. is it because i only use one simple jsp? than what else should use to connect to ejb? can anyone help me please

Answer 1

the code for Ejb bean classe
package bookings;
import java.sql.*;
import javax.sql.*;
import java.util.*;
import java.util.Date;
import java.math.*;
import javax.ejb.*;
import javax.naming.*;
public class BookBean implements EntityBean {
    private final static String dbName = "java:comp/env/jdbc/BooksDB";
    private String ISBN;
    private String title;
    private String author;
    private String borrowedBy;
    private String dateDue;
    private EntityContext context;
    private Connection con;
     public String getISBN() {
        return ISBN;
    public String getTitle() {
        return title;
    public String getAuthor() {
        return author;
    public String getBorrowedBy() {
        return borrowedBy;
public String getDateDue() {
        return dateDue;
    public String ejbCreate(String ISBN, String title, String author,
        String borrowedBy, String dateDue) throws CreateException {
        try {
            insertRow(ISBN, title, author, borrowedBy, dateDue);
        } catch (Exception ex) {
            throw new EJBException("ejbCreate: " + ex.getMessage());
        this.ISBN = ISBN;
        this.title = title;
        this.author = author;
        this.borrowedBy = borrowedBy;   
        this.dateDue = dateDue;
        return ISBN;
    public String ejbFindByPrimaryKey(String primaryKey)
        throws FinderException {
        boolean result;
        try {
            result = selectByPrimaryKey(primaryKey);
        } catch (Exception ex) {
            throw new EJBException("ejbFindByPrimaryKey: " + ex.getMessage());
        if (result) {
            return primaryKey;
        } else {
            throw new ObjectNotFoundException("Row for      ISBN " + primaryKey +
                " not found.");
    public Collection ejbFindByTitle(String title)
        throws FinderException {
        Collection result;
        try {
            result = selectByTitle(title);
        } catch (Exception ex) {
            throw new EJBException("ejbFindByTitle " + ex.getMessage());
        return result;
    public Collection ejbFindByAuthor(String author)
        throws FinderException {
        Collection result;
        try {
            result = selectByAuthor(author);
        } catch (Exception ex) {
            throw new EJBException("ejbFindByAuthor: " + ex.getMessage());
        return result;
    public void ejbRemove() {
        try {
            deleteRow(ISBN);
        } catch (Exception ex) {
            throw new EJBException("ejbRemove: " + ex.getMessage());
    public void setEntityContext(EntityContext context) {
        this.context = context;
    public void unsetEntityContext() {
    public void ejbActivate() {
        ISBN = (String) context.getPrimaryKey();
    public void ejbPassivate() {
        ISBN = null;
    public void ejbLoad() {
        try {
            loadRow();
        } catch (Exception ex) {
            throw new EJBException("ejbLoad: " + ex.getMessage());
    public void ejbStore() {
        try {
            storeRow();
        } catch (Exception ex) {
            throw new EJBException("ejbStore: " + ex.getMessage());
    public void ejbPostCreate(String ISBN, String title, String author,
        String borrowedBy,String dateDue) {
    /*********************** Database Routines *************************/
    private void makeConnection() {
        try {
            InitialContext ic = new InitialContext();
            DataSource ds = (DataSource) ic.lookup(dbName);
            con = ds.getConnection();
        } catch (Exception ex) {
            throw new EJBException("Unable to connect to database. " +
                ex.getMessage());
    private void releaseConnection() {
        try {
            con.close();
        } catch (SQLException ex) {
            throw new EJBException("releaseConnection: " + ex.getMessage());
    private void insertRow(String ISBN, String title, String author,
        String borrowedBy, String dateDue) throws SQLException {
        makeConnection();
        String insertStatement =
            "insert into books values ( ? , ? , ? , ? )";
        PreparedStatement prepStmt = con.prepareStatement(insertStatement);
        prepStmt.setString(1, ISBN);
        prepStmt.setString(2, title);
        prepStmt.setString(3, author);
        prepStmt.setString(4, borrowedBy);
         prepStmt.setString(5, dateDue);
        prepStmt.executeUpdate();
        prepStmt.close();
        releaseConnection();
    private void deleteRow(String ISBN) throws SQLException {
        makeConnection();
        String deleteStatement = "delete from Books where ISBN = ? ";
        PreparedStatement prepStmt = con.prepareStatement(deleteStatement);
        prepStmt.setString(1, ISBN);
        prepStmt.executeUpdate();
        prepStmt.close();
        releaseConnection();
    private boolean selectByPrimaryKey(String primaryKey)
        throws SQLException {
        makeConnection();
        String selectStatement =
            "select ISBN " + "from Books where ISBN = ? ";
        PreparedStatement prepStmt = con.prepareStatement(selectStatement);
        prepStmt.setString(1, primaryKey);
        ResultSet rs = prepStmt.executeQuery();
        boolean result = rs.next();
        prepStmt.close();
        releaseConnection();
        return result;
    private Collection selectByTitle(String title)
        throws SQLException {
        makeConnection();
        String selectStatement =
            "select ISBN" + "from bo where title = ? ";
        PreparedStatement prepStmt = con.prepareStatement(selectStatement);
        prepStmt.setString(1, title);
        ResultSet rs = prepStmt.executeQuery();
        ArrayList a = new ArrayList();
        while (rs.next()) {
            String ISBN = rs.getString(1);
            a.add(ISBN);
        prepStmt.close();
        releaseConnection();
        return a;
    private Collection selectByAuthor(String author)
        throws SQLException {
        makeConnection();
        String selectStatement =
            "select ISBN from Books " +
            "where author = ?";
        PreparedStatement prepStmt = con.prepareStatement(selectStatement);
        prepStmt.setString(1, author);
        ResultSet rs = prepStmt.executeQuery();
        ArrayList a = new ArrayList();
        while (rs.next()) {
            String ISBN = rs.getString(1);
            a.add(ISBN);
        prepStmt.close();
        releaseConnection();
        return a;
    private void loadRow() throws SQLException {
        makeConnection();
        String selectStatement =
            "select title, author,borrowedBy, dateDue " +
            "from Books where ISBN = ? ";
        PreparedStatement prepStmt = con.prepareStatement(selectStatement);
        prepStmt.setString(1, this.ISBN);
        ResultSet rs = prepStmt.executeQuery();
        if (rs.next()) {
            this.title = rs.getString(1);
            this.author = rs.getString(2);
            this.borrowedBy=rs.getString(3);
            this.dateDue = rs.getString(4);
            prepStmt.close();
        } else {
            prepStmt.close();
            throw new NoSuchEntityException("Row for ISBN " + ISBN +
                " not found in database.");
        releaseConnection();
    private void storeRow() throws SQLException {
        makeConnection();
        String updateStatement =
            "update Books set title =  ? ," +
            "author = ? , borrowedBy = ? " + " dateDue = ?, where ISBN = ?";
        PreparedStatement prepStmt = con.prepareStatement(updateStatement);
        prepStmt.setString(1, title);
        prepStmt.setString(2, author);
        prepStmt.setString(3, borrowedBy);       
        prepStmt.setString(4, dateDue);
        prepStmt.setString(5, ISBN);
        int rowCount = prepStmt.executeUpdate();
        prepStmt.close();
        if (rowCount == 0) {
            throw new EJBException("Storing row for ISBN " + ISBN + " failed.");
        releaseConnection();
// end of BookBean the code for remot interface
package bookings;
import java.rmi.RemoteException;
// Java extension packages
import javax.ejb.*;
public interface Book extends EJBObject {
    public void getISBN() throws RemoteException;
    public String getTitle() throws RemoteException;
    public String getAuthor() throws RemoteException;
    public String getBorrowedBy() throws RemoteException;
    public String getDateDue() throws RemoteException;
}the codes for home // BookHome.java
// BookHome is the home interface for entity EJB Book.
package bookings;
import java.util.Collection;
import java.rmi.RemoteException;
// Java extension packages
import javax.ejb.*;
public interface BookHome extends EJBHome {
    // create Book EJB using given book details
   public Book create( String ISBN, String title, String author,
        String borrowedBy, String dateDue)  throws RemoteException, CreateException;
   // find Book with given ISBN
   public Book findByPrimaryKey( String isbn )
      throws RemoteException, FinderException;
   // find all Books
   public Collection findAllBooks()
      throws RemoteException, FinderException;
   // find Books with given title
   public Collection findByTitle( String title )
      throws RemoteException, FinderException;
     // find Books with given author
    public Collection findByAuthor(String author)
        throws FinderException, RemoteException;
  // find Books with given author
    public Collection findBorrowedBy(String borrowedBy)
        throws FinderException, RemoteException;
  }the code for index.jsp to use the ejb which i get this error messgae when i run it
HTTP 404 - File not found
Internet Explorer i can tell you that i have deployed 8 times with changes
<%@ page import="bookings.*, javax.ejb.*, javax.naming.*, javax.rmi.PortableRemoteObject, java.rmi.RemoteException" %>
<%!
   private Book book = null;
   public void jspInit() {
      try {
         InitialContext ic = new InitialContext();
         Object objRef = ic.lookup("java:comp/env/ejb/TheBooking");
         BookHome home = (BookHome)PortableRemoteObject.narrow(objRef, BookHome.class);
         book = home.create();
      } catch (RemoteException ex) {
            System.out.println("Couldn't create book bean."+ ex.getMessage());
      } catch (CreateException ex) {
            System.out.println("Couldn't create book bean."+ ex.getMessage());
      } catch (NamingException ex) {
            System.out.println("Unable to lookup home: "+ "TheBook "+ ex.getMessage());
   public void jspDestroy() {   
         book = null;
%>
<html>
<head>
    <title>Book</title>
</head>
<body bgcolor="white">
<h1><b><center>Book</center></b></h1>
<hr>
<p>Enter an ISBN:</p>
<form method="get">
<input type="text" name="amount" size="25">
<br>
<p>
<input type="submit" value="Submit">
<input type="reset" value="Reset">
</form>
<%
    String isbn = request.getParameter("isbn");
%>
   <p>
   <%= isbn %> the book isbn is  <%= book.getISBN() %> 
   <p>
   <%= title %> the book title <%= book.getTitle() %> 
</body>
</html>