Java tutorial
/* * Copyright 2015 Institute of Computer Science, * Foundation for Research and Technology - Hellas * * Licensed under the EUPL, Version 1.1 or - as soon they will be approved * by the European Commission - subsequent versions of the EUPL (the "Licence"); * You may not use this work except in compliance with the Licence. * You may obtain a copy of the Licence at: * * http://ec.europa.eu/idabc/eupl * * Unless required by applicable law or agreed to in writing, software distributed * under the Licence is distributed on an "AS IS" basis, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the Licence for the specific language governing permissions and limitations * under the Licence. * * Contact: POBox 1385, Heraklio Crete, GR-700 13 GREECE * Tel:+30-2810-391632 * Fax: +30-2810-391638 * E-mail: isl@ics.forth.gr * http://www.ics.forth.gr/isl * * Authors : Konstantina Konsolaki, Georgios Samaritakis * * This file is part of the FIMS webapp. */ package isl.FIMS.servlet.imports; import isl.FIMS.servlet.ApplicationBasicServlet; import isl.FIMS.utils.Vocabulary; import isl.FIMS.utils.entity.Config; import isl.FIMS.utils.Utils; import isl.dms.DMSConfig; import isl.dms.DMSException; import isl.dms.xml.XMLTransform; import java.io.BufferedReader; import java.io.File; import java.io.IOException; import java.io.PrintWriter; import java.sql.Timestamp; import java.util.ArrayList; import java.util.Arrays; import java.util.Iterator; import java.util.List; import javax.servlet.ServletContext; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.fileupload.FileItem; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.FileCleanerCleanup; import org.apache.commons.fileupload.servlet.ServletFileUpload; import org.apache.commons.io.FileCleaningTracker; /** * * @author konsolak */ public class ImportVocabulary extends ApplicationBasicServlet { /** * 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 */ private BufferedReader input; private static final int REQUEST_SIZE = 10000 * 1024; protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { this.initVars(request); String username = getUsername(request); Config conf = new Config("AdminVoc"); response.setContentType("text/html;charset=UTF-8"); PrintWriter out = response.getWriter(); StringBuilder xml = new StringBuilder( this.xmlStart(this.topmenu, username, this.pageTitle, this.lang, "", request)); String file = request.getParameter("file"); if (ServletFileUpload.isMultipartContent(request)) { // configures some settings String filePath = this.export_import_Folder; java.util.Date date = new java.util.Date(); Timestamp t = new Timestamp(date.getTime()); String currentDir = filePath + t.toString().replaceAll(":", ""); File saveDir = new File(currentDir); if (!saveDir.exists()) { saveDir.mkdir(); } DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(DiskFileItemFactory.DEFAULT_SIZE_THRESHOLD); factory.setRepository(saveDir); ServletFileUpload upload = new ServletFileUpload(factory); upload.setSizeMax(REQUEST_SIZE); // constructs the directory path to store upload file String uploadPath = currentDir; try { // parses the request's content to extract file data List formItems = upload.parseRequest(request); Iterator iter = formItems.iterator(); // iterates over form's fields File storeFile = null; while (iter.hasNext()) { FileItem item = (FileItem) iter.next(); // processes only fields that are not form fields if (!item.isFormField()) { String fileName = new File(item.getName()).getName(); filePath = uploadPath + File.separator + fileName; storeFile = new File(filePath); // saves the file on disk item.write(storeFile); } } ArrayList<String> content = Utils.readFile(storeFile); DMSConfig vocConf = new DMSConfig(this.DBURI, this.systemDbCollection + "Vocabulary/", this.DBuser, this.DBpassword); Vocabulary voc = new Vocabulary(file, this.lang, vocConf); String[] terms = voc.termValues(); for (int i = 0; i < content.size(); i++) { String addTerm = content.get(i); if (!Arrays.asList(terms).contains(addTerm)) { voc.addTerm(addTerm); } } Utils.deleteDir(currentDir); response.sendRedirect("AdminVoc?action=list&file=" + file + "&menuId=AdminVoc"); } catch (Exception ex) { } } xml.append("<FileName>").append(file).append("</FileName>\n"); xml.append("<EntityType>").append("AdminVoc").append("</EntityType>\n"); xml.append(this.xmlEnd()); String xsl = conf.IMPORT_Vocabulary; try { XMLTransform xmlTrans = new XMLTransform(xml.toString()); xmlTrans.transform(out, xsl); } catch (DMSException e) { e.printStackTrace(); } out.close(); } private DiskFileItemFactory setupFileItemFactory(File repository, ServletContext context) { DiskFileItemFactory factory = new DiskFileItemFactory(); factory.setSizeThreshold(DiskFileItemFactory.DEFAULT_SIZE_THRESHOLD); factory.setRepository(repository); FileCleaningTracker pTracker = FileCleanerCleanup.getFileCleaningTracker(context); factory.setFileCleaningTracker(pTracker); return factory; } // <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> }