How to Autogenerate of ID from database and show on JSP page?

problem in web application : I have a database names tasks in SQL server 2005 having tasks id as primay key, I am using JSP and struts for database connectivity,Now I can update my database but i want to autogenerate tasks id in numbers on JSP page when I click on CreateTask.jsp page.How can i do so?My project storing user entered task id,task name ,date etc properly in the database,but what and how should i make it (in taskAction.java) that it auto generate tasksid in jp page when i click on Create_task.jsp and other data user can enter himself.I am using Jdeveloper.Codes: create.jsp :-

<%@ page language="Java" %>  
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html"%><%@ page contentType="text/html;charset=windows-1252"%>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>

<html:form action ="taskAction.do">
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
    <title>untitled</title>
  </head>
  <body>
    <form >
      <P>&nbsp;</P>
      <BLOCKQUOTE>
        <BLOCKQUOTE>
          <BLOCKQUOTE>
            <BLOCKQUOTE>
              <P>
                <SPAN style="background-color:rgb(204,204,204); background-color:rgb(204,204,204);"><SPAN style="background-color:rgb(255,255,255);"><FONT color="#006666"><STRONG><U><h1>
                  <SPAN style="background-color:rgb(255,255,255); background-color:rgb(204,204,204);">TASK MANAGER</SPAN>
                </h1></U></STRONG>&nbsp;</FONT><SPAN style="background-color:rgb(204,255,255); background-color:rgb(204,204,255);"><FONT color="#003300">&nbsp;</FONT></SPAN> </SPAN></SPAN></P>
            </BLOCKQUOTE>
          </BLOCKQUOTE>
        </BLOCKQUOTE>
      </BLOCKQUOTE>
      <P>
        <SPAN style="background-color:rgb(204,255,255); background-color:rgb(204,204,255);"><FONT color="#003300">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Task Id &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            <html:text property="taskid"/>
          </FONT>
        </SPAN>
      </P>
      <P>
        <SPAN style="background-color:rgb(204,255,255); background-color:rgb(204,204,255);"><FONT color="#003300">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Task Name &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            <html:text property="taskname"/>
          </FONT>
        </SPAN>
      </P>
      <P>
        <SPAN style="background-color:rgb(204,255,255); background-color:rgb(204,204,255);"><FONT color="#003300">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Date &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
            <html:text property="dateOfBirth"/>
          </FONT>
        </SPAN>
      </P>
      <P> &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      </P>
      <P>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
      <input type="submit" value="Submit"/></P>
    </form>
  </body>
</html:form>

taskAction.java :-

//import TaskBO;
import org.apache.struts.action.Action;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.*;



public class taskAction extends Action 
{
 public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request,
                              HttpServletResponse response) 
  {
    ActionForward forward;
    taskform tForm = (taskform) form; 
    Taskdata taskdata = populateTaskdata(tForm);
    TaskBO taskBO = new TaskBO();
    if (taskBO.createtask(taskdata)) 
    {
      forward = mapping.findForward("success");
    }
    else 
    {
      forward = mapping.findForward("failure");
    }
    return forward;

  }
    private Taskdata populateTaskdata(taskform form) 
  {
    Taskdata td = new Taskdata();
    td.setTaskid(form.getTaskid());
     td.setTaskname(form.getTaskname());
      td.setDateOfBirth(form.getDateOfBirth());

    return td;
  }
}

taskform.java :-

import org.apache.struts.action.ActionForm;

public class taskform extends ActionForm 
{

  private int taskid;
  private String taskname;
  private String dateOfBirth;
  private String update;
  private String delete;

  public taskform()
  {
    taskid = 0;
    taskname = "";
    dateOfBirth = "";
  }



  public void setTaskid(int taskid)
  {
    this.taskid = taskid;
  }
  public int getTaskid()
  {
    return taskid;
  }


  public void setTaskname(String taskname)
  {
    this.taskname = taskname;
  }

    public String getTaskname()
  {
    return taskname;
  }

  public void setDateOfBirth(String dateOfBirth)
  {
    this.dateOfBirth = dateOfBirth;
  }


  public String getDateOfBirth()
  {
    return dateOfBirth;
  }


  public void setUpdate(String update)
  {
    this.update = update;
  }


  public String getUpdate()
  {
    return update;
  }


  public void setDelete(String delete)
  {
    this.delete = delete;
  }


  public String getDelete()
  {
    return delete;
  }
}

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