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. */ package Servlets; import Controladora.CtrlLogin; import Controladora.CtrlUsuario; import Modelo.Usuario; import com.google.gson.Gson; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import static java.lang.System.out; import java.sql.SQLException; import java.util.ArrayList; import java.util.Hashtable; import java.util.List; import java.util.logging.Level; import java.util.logging.Logger; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.FileItemFactory; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; /** * * @author microtik */ @WebServlet(name = "ServletUsuario", urlPatterns = { "/ServletUsuario" }) public class ServletUsuario extends HttpServlet { private CtrlUsuario ctrlUsuario; private CtrlLogin ctrlLogin; private Usuario user; public ServletUsuario() { ctrlUsuario = new CtrlUsuario(); ctrlLogin = new CtrlLogin(); } /** * 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, SQLException, Exception { //response.setContentType("text/html;charset=UTF-8"); boolean isMultipart = ServletFileUpload.isMultipartContent(request); if (isMultipart) { cargaUsuario(request, response); } else if (request.getParameter("borrar") != null) { String iduser = request.getParameter("borrar"); try { ctrlUsuario.bajaUsuario(Integer.parseInt(iduser)); } catch (SQLException e) { //HttpSession sesion = request.getSession(true); //sesion.setAttribute("msg", "prueba error"); ArrayList list = new ArrayList(); list.add("No se puede borrar usuario, tiene reservas"); String json = new Gson().toJson(list); response.setContentType("application/json"); response.setCharacterEncoding("UTF-8"); response.getWriter().write(json); } } else { listaUsuario(request, response); } } private void cargaUsuario(HttpServletRequest request, HttpServletResponse response) throws FileUploadException, Exception { FileItemFactory file_factory = new DiskFileItemFactory(); ServletFileUpload servlet_up = new ServletFileUpload(file_factory); List items = servlet_up.parseRequest(request); String urlImg = ""; Hashtable datosUsuario = new Hashtable(); HttpSession valida = null; for (int i = 0; i < items.size(); i++) { FileItem item = (FileItem) items.get(i); if (!item.isFormField()) { urlImg = item.getName(); if (!urlImg.equals("")) { String dir = getServletContext().getRealPath("/"); String dir2 = dir.replaceAll("web", "img"); String dir3 = dir2.replaceAll("build", "web"); dir3 = dir3.concat("imgUsuarios/"); File fileFoto = new File(dir3, item.getName()); item.write(fileFoto); } } else { datosUsuario.put(item.getFieldName(), item.getString()); } } String adm = (String) datosUsuario.get("administrador"); String mod = (String) datosUsuario.get("Modifica"); boolean esAdm = false; if (adm != null) { esAdm = true; } if (urlImg.equals("")) { urlImg = (String) datosUsuario.get("imgdefecto"); } user = new Usuario(0, (String) datosUsuario.get("nombre"), (String) datosUsuario.get("apellido"), Integer.parseInt((String) datosUsuario.get("dni")), esAdm, (String) datosUsuario.get("user"), (String) datosUsuario.get("pass"), (String) datosUsuario.get("email"), (String) datosUsuario.get("telefono"), urlImg); if (mod == null) { RequestDispatcher rd = getServletContext().getRequestDispatcher( "/ServletValidaUser?user=" + user.getUser() + "&email=" + user.getEmail()); rd.include(request, response); valida = request.getSession(true); if (valida.getAttribute("usuarioValid") == null) { try { ctrlUsuario.registraUsuario(user); } catch (SQLException ex) { Logger.getLogger(ServletRegistro.class.getName()).log(Level.SEVERE, null, ex); } } else { RequestDispatcher volver = request .getRequestDispatcher("/abmUsuario.jsp?errorUser='El nombre de usuario o mail ya existen'"); volver.forward(request, response); } } else { user.setId(Integer.parseInt(mod)); ctrlUsuario.modificarUsuario(user); } //valida.invalidate(); Thread.sleep(2000); RequestDispatcher volver = request.getRequestDispatcher("/abmUsuario.jsp"); volver.forward(request, response); } private void listaUsuario(HttpServletRequest request, HttpServletResponse response) throws SQLException, IOException { String idUsuario = request.getParameter("id"); ArrayList<Usuario> list = null; boolean flag = false; if (idUsuario == null) { flag = true; } else { if (!idUsuario.equals("0")) { list = new ArrayList<>(); list.add(ctrlUsuario.traePorId(Integer.parseInt(idUsuario))); flag = true; } else { list = ctrlUsuario.listarUsuarios(); } if (flag) { String json = new Gson().toJson(list); response.setContentType("application/json"); response.setCharacterEncoding("UTF-8"); response.getWriter().write(json); } } } // <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 { try { processRequest(request, response); } catch (Exception ex) { Logger.getLogger(ServletUsuario.class.getName()).log(Level.SEVERE, null, ex); } } /** * 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 { try { processRequest(request, response); } catch (Exception ex) { Logger.getLogger(ServletUsuario.class.getName()).log(Level.SEVERE, null, ex); } } /** * Returns a short description of the servlet. * * @return a String containing servlet description */ @Override public String getServletInfo() { return "Short description"; }// </editor-fold> }