Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.hibernate.Session; /** * * @author ra21550273 */ public class CarregaPencel extends HttpServlet { /** * Processes requests for both HTTP <code>GET</code> and <code>POST</code> * methods. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html;charset=UTF-8"); try (PrintWriter out = response.getWriter()) { /* TODO output your page here. You may use following sample code. */ //Id do pincel que se queira buscar int idPincel = 10254; //Buscar do banco.. Pincel pincel0; //Conectar-se ao banco (Abrindo porta com o Banco de Dados) Session sessao = HibernateUtil.getSessionFactory().openSession(); //o mtodos .get(a,b) busca no banco pelo nome da classe (a) e a chave primria (b) (do mesmo tipo do id mapeado na classe) //Necessita da utilizao da typecast antes do .get (mesmo nome da classe) pincel0 = (Pincel) sessao.get(Pincel.class, idPincel); out.println("Dados do pincel 0: "); out.println("Cor: " + pincel0.getCor()); out.println("Fabricante: " + pincel0.getFabricante().getNome()); out.println("Numero de Srie: " + pincel0.getNum_serie()); } } // <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 * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Handles the HTTP <code>POST</code> method. * * @param request servlet request * @param response servlet response * @throws ServletException if a servlet-specific error occurs * @throws IOException if an I/O error occurs */ @Override protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { processRequest(request, response); } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> }