Java tutorial
/* * To change this template, choose Tools | Templates * and open the template in the editor. */ /* Copyright (c) 2014 "(IA)2 Research Group. Universidad de Mlaga" http://iaia.lcc.uma.es | http://www.uma.es This file is part of SISOB Data Extractor. SISOB Data Extractor is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. SISOB Data Extractor 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 General Public License for more details. You should have received a copy of the GNU General Public License along with SISOB Data Extractor. If not, see <http://www.gnu.org/licenses/>. */ package eu.sisob.uma.footils.File; import java.io.*; import java.net.JarURLConnection; import java.net.URL; import java.net.URLConnection; import java.util.Enumeration; import java.util.jar.JarEntry; import java.util.jar.JarFile; import org.apache.commons.lang3.StringUtils; /** * * @author Daniel Lpez Gonzlez (dlopez@lcc.uma.es, dlopezgonzalez@gmail.com) for the SISOB PROJECT (http://sisob.lcc.uma.es/) */ public class FileFootils { public static File[] finderByName(String dirName, final String fileName) { File dir = new File(dirName); return dir.listFiles(new FilenameFilter() { public boolean accept(File dir, String filename) { return filename.endsWith(fileName + ".*"); } }); } public static String readStream(InputStream is, String encoding) { StringBuilder sb = new StringBuilder(512); try { Reader r = new InputStreamReader(is, encoding); int c = 0; while (c != -1) { c = r.read(); sb.append((char) c); } } catch (IOException e) { throw new RuntimeException(e); } return sb.toString(); } /** * * @param content * @param name * @param encode */ public static void writeFile(String content, String name, String encode) throws FileNotFoundException, UnsupportedEncodingException, IOException { File fField = new File(name); FileOutputStream fileOS; fileOS = new java.io.FileOutputStream(fField, false); OutputStreamWriter writer = new java.io.OutputStreamWriter(fileOS, encode); BufferedWriter bw = new java.io.BufferedWriter(writer); String sOut = content; bw.write(sOut); bw.close(); } /** * * @param sPath */ public static void deleteDir(String sPath) { File dir = new File(sPath); if (dir.exists()) deleteDir(dir); dir.delete(); } /** * * @param dir */ public static void deleteDir(File dir) { File[] files = dir.listFiles(); for (int x = 0; x < files.length; x++) { if (files[x].isDirectory()) { deleteDir(files[x]); } files[x].delete(); } } public static void copyfile(File f1, File f2) throws FileNotFoundException, IOException { InputStream in = new FileInputStream(f1); //For Append the file. //OutputStream out = new FileOutputStream(f2,true); //For Overwrite the file. OutputStream out = new FileOutputStream(f2); byte[] buf = new byte[1024]; int len; while ((len = in.read(buf)) > 0) { out.write(buf, 0, len); } in.close(); out.close(); } public static void copyFolder(File src, File dest) throws IOException { if (src.isDirectory()) { //if directory not exists, create it if (!dest.exists()) { dest.mkdir(); } //list all the directory contents String files[] = src.list(); for (String file : files) { //construct the src and dest file structure File srcFile = new File(src, file); File destFile = new File(dest, file); //recursive copy copyFolder(srcFile, destFile); } } else { //if file, then copy it //Use bytes stream to support all file types InputStream in = new FileInputStream(src); OutputStream out = new FileOutputStream(dest); byte[] buffer = new byte[1024]; int length; //copy the file content in bytes while ((length = in.read(buffer)) > 0) { out.write(buffer, 0, length); } in.close(); out.close(); } } public static int getNumberOfLinesFromFile(String filepath) throws FileNotFoundException, IOException { File f = new File(filepath); return getNumberOfLinesFromFile(f); } public static int getNumberOfLinesFromFile(File f) throws FileNotFoundException, IOException { BufferedReader reader = null; int lines = 0; reader = new BufferedReader(new FileReader(f)); while (reader.readLine() != null) lines++; reader.close(); return lines; } public static boolean copyFile(final File toCopy, final File destFile) { try { return FileFootils.copyStream(new FileInputStream(toCopy), new FileOutputStream(destFile)); } catch (final FileNotFoundException e) { e.printStackTrace(); } return false; } private static boolean copyFilesRecusively(final File toCopy, final File destDir) { assert destDir.isDirectory(); if (!toCopy.isDirectory()) { return FileFootils.copyFile(toCopy, new File(destDir, toCopy.getName())); } else { final File newDestDir = new File(destDir, toCopy.getName()); if (!newDestDir.exists() && !newDestDir.mkdir()) { return false; } for (final File child : toCopy.listFiles()) { if (!FileFootils.copyFilesRecusively(child, newDestDir)) { return false; } } } return true; } public static boolean copyJarResourcesRecursively(final File destDir, final JarURLConnection jarConnection) throws IOException { final JarFile jarFile = jarConnection.getJarFile(); for (final Enumeration<JarEntry> e = jarFile.entries(); e.hasMoreElements();) { final JarEntry entry = e.nextElement(); if (entry.getName().startsWith(jarConnection.getEntryName())) { final String filename = StringUtils.removeStart(entry.getName(), // jarConnection.getEntryName()); final File f = new File(destDir, filename); if (!entry.isDirectory()) { final InputStream entryInputStream = jarFile.getInputStream(entry); if (!FileFootils.copyStream(entryInputStream, f)) { return false; } entryInputStream.close(); } else { if (!FileFootils.ensureDirectoryExists(f)) { throw new IOException("Could not create directory: " + f.getAbsolutePath()); } } } } return true; } public static boolean copyResourcesRecursively( // final URL originUrl, final File destination) { try { final URLConnection urlConnection = originUrl.openConnection(); if (urlConnection instanceof JarURLConnection) { return FileFootils.copyJarResourcesRecursively(destination, (JarURLConnection) urlConnection); } else { return FileFootils.copyFilesRecusively(new File(originUrl.getPath()), destination); } } catch (final IOException e) { e.printStackTrace(); } return false; } private static boolean copyStream(final InputStream is, final File f) { try { return FileFootils.copyStream(is, new FileOutputStream(f)); } catch (final FileNotFoundException e) { e.printStackTrace(); } return false; } private static boolean copyStream(final InputStream is, final OutputStream os) { try { final byte[] buf = new byte[1024]; int len = 0; while ((len = is.read(buf)) > 0) { os.write(buf, 0, len); } is.close(); os.close(); return true; } catch (final IOException e) { e.printStackTrace(); } return false; } private static boolean ensureDirectoryExists(final File f) { return f.exists() || f.mkdir(); } }