Want to display from database but javaclas not returning values to servlets

Question

I am trying to view values stored in database using jsp, servlets and java class. Jsp is calling servlet and servlet calls java class file. and javaclass file retrieves data from database and sends it back to servlet. But my problem is servlet doesnt print the values.
Here is my code
This is the javaclass file.
package pack;
import java.util.*;
import java.sql.Driver.*;
import java.sql.Connection.*;
import java.sql.*;
import java.sql.DriverManager.*;
import java.sql.SQLException.*;
import java.io.*;
import java.io.Serializable;
import java.util.Vector;
import pack.ser1;
/* Control is got from the servlet file */
public class employbean implements Serializable
  public Vector result;
  public Vector getResult() throws ClassNotFoundException, InstantiationException, IllegalAccessException
            /* Connection is established to retrieve data from the database */
            Vector v = new Vector();
            ResultSet rs = null;
            PreparedStatement st = null;
            try
             Class.forName("org.gjt.mm.mysql.Driver").newInstance();
             Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sample?user=user&password=password");
              st = connection.prepareStatement("Select * from samp");
              rs = st.executeQuery();
              while(rs.next())
                  v.addElement(rs.getString("empid"));
              st.close();
              connection.close();
             catch(SQLException esql)
                  esql.printStackTrace();
              this.result = v;
             /* Control is sent back to the servlet */
             return result;
}Here is the servlet code.
package pack;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import pack.employbean;
import java.util.Enumeration;
import java.util.Vector;
import pack.*;
public class ser1 extends HttpServlet
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException, InstantiationException, IllegalAccessException, ClassNotFoundException
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        try
          employbean ebean = new employbean();
          Vector v = ebean.getResult();
          Enumeration en = v.elements();
          while(en.hasMoreElements())
            out.println("employee id= "+ en.nextElement());
          out.println("employid"+employid);
         catch(Exception m)
           out.println(m);
         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
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException
    /** 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
    /** Returns a short description of the servlet.
    public String getServletInfo()
        return "Short description";
}Please help me with my code as where i might have gone wrong and help me rectifying the errors.
I also would like to know if this is MVC pattern.
Thanks in Advance

Answer 1

Try this one
package pack;
import java.util.*;
import java.sql.Driver.*;
import java.sql.Connection.*;
import java.sql.*;
import java.sql.DriverManager.*;
import java.sql.SQLException.*;
import java.io.*;
import java.io.Serializable;
import java.util.Vector;
import pack.ser1;
/* Control is got from the servlet file */
public class employbean implements Serializable
public Vector result;
public Vector getResult() throws Exception
/* Connection is established to retrieve data from the database */
Vector v = new Vector();
ResultSet rs = null;
PreparedStatement st = null;
try
Class.forName("org.gjt.mm.mysql.Driver").newInstance();
Connection connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/sample?user=user&password=password");
st = connection.prepareStatement("Select * from samp");
rs = st.executeQuery();
while(rs.next())
v.addElement(rs.getString("empid"));
st.close();
connection.close();
catch(SQLException esql)
     throw e;
this.result = v;
/* Control is sent back to the servlet */
return result;
Here is the servlet code.
package pack;
import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
import pack.employbean;
import java.util.Enumeration;
import java.util.Vector;
import pack.*;
public class ser1 extends HttpServlet
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException, InstantiationException, IllegalAccessException, ClassNotFoundException
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
try
employbean ebean = new employbean();
Vector v = ebean.getResult();
Enumeration en = v.elements();
while(en.hasMoreElements())
out.println("employee id= "+ en.nextElement());
// out.println("employid"+employid);
catch(Exception m)
out.println(m);
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
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
try
processRequest(request,response);
catch(Exception e)
/** 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
try
processRequest(request,response);
catch(Exception e)
/** Returns a short description of the servlet.
public String getServletInfo()
return "Short description";
Send me the output