Java tutorial
/** * Axelor Business Solutions * * Copyright (C) 2016 Axelor (<http://axelor.com>). * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License, version 3, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.axelor.apps.tool.file; import java.io.BufferedReader; import java.io.BufferedWriter; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.FileReader; import java.io.FileWriter; import java.io.IOException; import java.util.ArrayList; import java.util.List; import org.apache.commons.io.IOUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; public final class FileTool { private static final Logger LOG = LoggerFactory.getLogger(FileTool.class); private FileTool() { } /** * Mthode permettant de lire le contenu d'un fichier * * @param fileName * Le nom du fichier * @return * Une liste contenant l'ensemble des lignes * @throws IOException * @throws AxelorException */ public static List<String> reader(String fileName) throws IOException { List<String> content = new ArrayList<String>(); BufferedReader br = new BufferedReader(new FileReader(new File(fileName))); String ligne = ""; while ((ligne = br.readLine()) != null) { content.add(ligne); } br.close(); return content; } /** * Mthode permettant d'crire une ligne dans un fichier * @param destinationFolder * Le chemin du fichier * @param fileName * Le nom du fichier * @param line * La ligne crire * @throws IOException */ public static void writer(String destinationFolder, String fileName, String line) throws IOException { System.setProperty("line.separator", "\r\n"); FileWriter writer = null; try { File file = create(destinationFolder, fileName); writer = new FileWriter(file); writer.write(line); } catch (IOException ex) { LOG.error(ex.getMessage()); } finally { if (writer != null) { writer.close(); } } } /** * Mthode permettant d'crire plusieurs lignes dans un fichier * @param destinationFolder * Le chemin du fichier * @param fileName * Le nom du fichier * @param line * La liste de ligne crire * @throws IOException */ public static void writer(String destinationFolder, String fileName, List<String> multiLine) throws IOException { System.setProperty("line.separator", "\r\n"); BufferedWriter output = null; try { File file = create(destinationFolder, fileName); output = new BufferedWriter(new FileWriter(file)); int i = 0; for (String line : multiLine) { output.write(line); output.newLine(); i++; if (i % 50 == 0) { output.flush(); } } } catch (IOException ex) { LOG.error(ex.getMessage()); } finally { if (output != null) { output.close(); } } } /** * Cration d'un fichier avec son chemin si il n'existe pas * * @param fileName * @return * @throws IOException */ public static File create(String fileName) throws IOException { String[] filePath = fileName.split(System.getProperty("file.separator")); String name = filePath[filePath.length - 1]; return create(fileName.replace(name, ""), name); } /** * Cration d'un fichier avec son chemin si il n'existe pas * * @param destinationFolder * @param fileName * @return * @throws IOException */ public static File create(String destinationFolder, String fileName) throws IOException { File folder = new File(destinationFolder); if (!folder.exists()) { folder.mkdirs(); } return new File(folder, fileName); } /** * Mthode permettant de copier le fichier vers une destination * * @param fileSrc * Le chemin du fichier source * @param fileDest * Le chemin du fichier destination * @throws IOException * @throws FileNotFoundException * @throws AxelorException */ public static void copy(String fileSrc, String fileDest) throws IOException { IOUtils.copy(new FileInputStream(fileSrc), new FileOutputStream(fileDest)); } /** * Copy all files and directories from a Folder to a destination Folder. * Must be called like: listAllFilesInFolder(srcFolderPath, "", srcFolderPath, * destFolderPath) * * @param currentFolder Used for the recursive called. * @param relatedPath Used for the recursive called. * @param sourceFolder Source directory. * @param destinationFolder Destination directory. * @param logger A logger. * @throws IOException */ public static void copyFolderToFolder(String sourceFolder, String destinationFolder) throws IOException { // Current Directory. File current = new File(sourceFolder); File destFile = new File(destinationFolder); if (!destFile.exists()) { destFile.mkdir(); } if (current.isDirectory()) { // List all files and folder in the current directory. File[] list = current.listFiles(); if (list != null) { // Read the files list. for (int i = 0; i < list.length; i++) { // Create current source File File tf = new File(sourceFolder + "/" + list[i].getName()); // Create current destination File File pf = new File(destinationFolder + "/" + list[i].getName()); if (tf.isDirectory() && !pf.exists()) { // If the file is a directory and does not exit in the // destination Folder. // Create the directory. pf.mkdir(); copyFolderToFolder(tf.getAbsolutePath(), pf.getAbsolutePath()); } else if (tf.isDirectory() && pf.exists()) { // If the file is a directory and exits in the // destination Folder. copyFolderToFolder(tf.getAbsolutePath(), pf.getAbsolutePath()); } else if (tf.isFile()) { // If it is a file. copy(sourceFolder + "/" + list[i].getName(), destinationFolder + "/" + list[i].getName()); } else { // Other cases. LOG.error("Error : Copy folder"); } } } } } }