CODEWITHSUNDEEP
javahibernatejspservletsdao
Batshitcrazy
Batshitcrazy

Reputation: 11

Invoking a DAO method on a Servlet

I'm making webpage where users can search for a rented product by rentID, in the Servlet I want to invoke a DAO method to find the rented product based on that rentID and redirect the user to a new webpage if the rent is found or not.

This is the JSP where users search product by ID

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org   /TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h3>Find Rent</h3><br>

<form  action="FindRent" method="GET">
<fieldset>
<p>
<label for="id">Rent ID</label>
<input type="text" name="id"/>
</p>
<p>
<input type="submit" value="Search" />
</p>
</fieldset>

</form>

</body>
</html>

This is the DAO implementation.

public class RentHibernateDao implements RentDao {

@Override
public void saveRent(Rent rent) {

    SessionFactory factory = 
            HibernateUtil.getSessionFactory();
        Session session = factory.openSession();

        session.getTransaction().begin();

         session.save(rent);

        session.getTransaction().commit();
        session.close();

}

@Override
public Rent find(Integer rentId) {
    SessionFactory factory = 
            HibernateUtil.getSessionFactory();
        Session session = factory.openSession();

        session.getTransaction().begin();

        Rent rent=(Rent)session.get(Rent.class, rentId);
        session.close();
    return rent;
}

@Override
public void EndRent(Integer rentId) {

    SessionFactory factory = 
            HibernateUtil.getSessionFactory();
        Session session = factory.openSession();

        session.getTransaction().begin();

        Rent rent=this.find(rentId);
        rent.setRealReturnDate(new Date());
        rent.getProduct().changeStatus();
        session.saveOrUpdate(rent);
        session.getTransaction().commit();
        session.close();


    }

And this is the Servlet. How can I invoke the method?

public class FindRent extends HttpServlet {
private static final long serialVersionUID = 1L;

/**
 * @see HttpServlet#HttpServlet()
 */
public Rent find() {
    super();
    // TODO Auto-generated constructor stub
}

/**
 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
 */
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

Upvotes: 0

Views: 2450

Answers (1)

Rockstar
Rockstar

Reputation: 2288

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    int rentId= Integer.parseInt(request.getParameter("id"));       // capture the rent id
    RentDao dao= new RentHibernateDao();        // create the dao object
    dao.find(rentId);   // If successful, it returns you an object of Rent class
   // means Id is there
  // put your processing logic here
    request.getRequestDispatcher("desiredpage.jsp").forward(request, response);         // forward to your desired page

   }

Upvotes: 1

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