public abstract class BaseObject
{
    public void commitTransaction(Connection pConn)
    {
        Statement stmt = pConn.createStatement();
        String query = getInsertSQLStatement(); // only defined in subclasses
        stmt.executeQuery(query);
    }

    private Connection getDBConnection()
    {
        // get DB connection
    }

    public abstract String getInsertSQLStatement();
    public abstract String getDeleteSQLStatement();
    public abstract String getUpdateSQLStatement();
}

public class MySessionBeanEJB implements SessionBean
{
    public void commitTransaction(BaseObject pObject)
    {
        Connection conn = getDBConnection();
        pObject.commitTransaction(conn);
    }

    private Connection getDBConnection()
    {
        // get DB connection
    }


public class Transaction extends BaseObject
{

    private String name;
    private String address;
    private String city;

    public Transaction()
    {
    }

    public setName(String pName)
    {
        name = pName;
    }
    public setAddress(String pAddress)
    {
        address = pAddress;
    }
    public setCity(String pCity)
    {
        city = pCity;
    }

    public String getInsertSQLStatement()
    {
        return "INSERT INTO Company (" + name + "," + address + "," + city + ") VALUES(?,?,?)";
    }
    public String getInsertSQLStatement()
    {
        return "UPDATE Company SET name = ? SET address = ? SET city = ? WHERE companyID = ?";
    }
    public String getInsertSQLStatement()
    {
        return "DELETE FROM Company WHERE CompanyID = ? ";
    }
}

public class JavaBean
{
    public void processData(HttpRequest request, HttpResponse response)
    {
        String name = request.getParameter("name");
        String address = request.getParameter("address");
        String city = request.getParameter("city");
        
        Transaction newTransaction = new Transaction();
        newTransaction.setName(name);
        newTransaction.setAddress(address);
        newTransaction.setCity(city);

        Context myContext = getInitialContext(getContextFlag());
        MySessionBeanHome home = myContext.lookup(pJNDIName);
        MySessionBeanRemote remoteEJB = home.create();

        remoteEJB.commitTransaction(newTransaction);
    }
}


public class ControllerServlet 
{
  public void doPost(request, response)
  {
    String command = request.getParameter("command");
    
    if (command != null)
    {
       // Get helper class name to process the page
       String className = request.getParameter("action");

       Class c = Class.forName(className);
       Object instance = c.newInstance();
       instance.processData(request, response);
    }
  }
}

Transaction.jsp
{
form method="post" name="ControllerServlet" action="JavaBean"
}