Don't forward to another page

I have a question regarding a doPost method. I have made doPost method that executes a query on a db.

code:

try{


         Statement st1 = con.createStatement();

        PreparedStatement ps1=con.prepareStatement("INSERT into nota (Id_utilizator,Nume_reteta,Nota) values ((SELECT Id_user from user where E_mail = '"+request.getSession().getAttribute("email")+"'),(SELECT Nume FROM reteta where Nume = '"+retetaidd+"'),('"+nota+"'))");
         ps1.executeUpdate();

        response.sendRedirect(request.getRequestURI());   

        st1.close();
        con.close();
        ps1.close();

    }
    catch (Exception e2)
    {
      e2.printStackTrace();
    } 

Now I want that when my query is executed the page don't redirect to another page, I want to stay on the same page and the query to be executed. I know that I should replace

request.getRequestDispatcher("/health.jsp").forward(request, response);

but I don't know with what.Could anyone help me?Thanks