Java tutorial
/* * This file is part of FTB Launcher. * * Copyright 2012-2014, FTB Launcher Contributors <https://github.com/Slowpoke101/FTBLaunch/> * FTB Launcher is licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package net.ftb.util; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.nio.channels.FileChannel; import java.util.Collections; import java.util.Comparator; import java.util.List; import java.util.Set; import java.util.jar.JarEntry; import java.util.jar.JarInputStream; import java.util.jar.JarOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipInputStream; import com.google.common.collect.Lists; import com.google.common.collect.Sets; import net.ftb.data.ModPack; import net.ftb.data.Settings; import net.ftb.log.Logger; public class FileUtils { /** * @param sourceFolder - the folder to be moved * @param destinationFolder - where to move to * @throws IOException */ public static void copyFolder(File sourceFolder, File destinationFolder) throws IOException { copyFolder(sourceFolder, destinationFolder, true); } public static void copyFolder(File sourceFolder, File destinationFolder, boolean overwrite) throws IOException { if (sourceFolder.isDirectory()) { if (!destinationFolder.exists()) { destinationFolder.mkdirs(); } String files[] = sourceFolder.list(); for (String file : files) { File srcFile = new File(sourceFolder, file); File destFile = new File(destinationFolder, file); copyFolder(srcFile, destFile, overwrite); } } else { copyFile(sourceFolder, destinationFolder, overwrite); } } /** * @param sourceFile - the file to be moved * @param destinationFile - where to move to * @throws IOException */ public static void copyFile(File sourceFile, File destinationFile) throws IOException { copyFile(sourceFile, destinationFile, true); } public static void copyFile(File sourceFile, File destinationFile, boolean overwrite) throws IOException { if (sourceFile.exists()) { if (!destinationFile.exists()) { destinationFile.getParentFile().mkdirs(); destinationFile.createNewFile(); } else if (!overwrite) return; FileChannel sourceStream = null, destinationStream = null; try { sourceStream = new FileInputStream(sourceFile).getChannel(); destinationStream = new FileOutputStream(destinationFile).getChannel(); destinationStream.transferFrom(sourceStream, 0, sourceStream.size()); } finally { if (sourceStream != null) { sourceStream.close(); } if (destinationStream != null) { destinationStream.close(); } } } } /** * @param resource - the resource to delete * @return whether deletion was successful * @throws IOException */ public static boolean delete(File resource) throws IOException { if (resource.isDirectory()) { File[] childFiles = resource.listFiles(); for (File child : childFiles) { delete(child); } } return resource.delete(); } /** * Extracts given zip to given location * @param zipLocation - the location of the zip to be extracted * @param outputLocation - location to extract to */ public static void extractZipTo(String zipLocation, String outputLocation) { ZipInputStream zipinputstream = null; try { byte[] buf = new byte[1024]; zipinputstream = new ZipInputStream(new FileInputStream(zipLocation)); ZipEntry zipentry = zipinputstream.getNextEntry(); while (zipentry != null) { String entryName = zipentry.getName(); int n; if (!zipentry.isDirectory() && !entryName.equalsIgnoreCase("minecraft") && !entryName.equalsIgnoreCase(".minecraft") && !entryName.equalsIgnoreCase("instMods")) { new File(outputLocation + File.separator + entryName).getParentFile().mkdirs(); FileOutputStream fileoutputstream = new FileOutputStream( outputLocation + File.separator + entryName); while ((n = zipinputstream.read(buf, 0, 1024)) > -1) { fileoutputstream.write(buf, 0, n); } fileoutputstream.close(); } zipinputstream.closeEntry(); zipentry = zipinputstream.getNextEntry(); } } catch (Exception e) { Logger.logError("Error while extracting zip", e); backupExtract(zipLocation, outputLocation); } finally { try { zipinputstream.close(); } catch (IOException e) { } } } public static void backupExtract(String zipLocation, String outputLocation) { Logger.logInfo("Extracting (Backup way)"); byte[] buffer = new byte[1024]; ZipInputStream zis = null; ZipEntry ze; try { File folder = new File(outputLocation); if (!folder.exists()) { folder.mkdir(); } zis = new ZipInputStream(new FileInputStream(zipLocation)); ze = zis.getNextEntry(); while (ze != null) { File newFile = new File(outputLocation, ze.getName()); newFile.getParentFile().mkdirs(); if (!ze.isDirectory()) { FileOutputStream fos = new FileOutputStream(newFile); int len; while ((len = zis.read(buffer)) > 0) { fos.write(buffer, 0, len); } fos.flush(); fos.close(); } ze = zis.getNextEntry(); } } catch (IOException ex) { Logger.logError("Error while extracting zip", ex); } finally { try { zis.closeEntry(); zis.close(); } catch (IOException e) { } } } /** * deletes the META-INF */ public static void killMetaInf() { File inputFile = new File(Settings.getSettings().getInstallPath() + "/" + ModPack.getSelectedPack().getDir() + "/minecraft/bin", "minecraft.jar"); File outputTmpFile = new File(Settings.getSettings().getInstallPath() + "/" + ModPack.getSelectedPack().getDir() + "/minecraft/bin", "minecraft.jar.tmp"); try { JarInputStream input = new JarInputStream(new FileInputStream(inputFile)); JarOutputStream output = new JarOutputStream(new FileOutputStream(outputTmpFile)); JarEntry entry; while ((entry = input.getNextJarEntry()) != null) { if (entry.getName().contains("META-INF")) { continue; } output.putNextEntry(entry); byte buffer[] = new byte[1024]; int amo; while ((amo = input.read(buffer, 0, 1024)) != -1) { output.write(buffer, 0, amo); } output.closeEntry(); } input.close(); output.close(); if (!inputFile.delete()) { Logger.logError("Failed to delete Minecraft.jar."); return; } outputTmpFile.renameTo(inputFile); } catch (FileNotFoundException e) { Logger.logError("Error while killing META-INF", e); } catch (IOException e) { Logger.logError("Error while killing META-INF", e); } } public static List<File> listDirs(File path) { List<File> ret = Lists.newArrayList(); if (path.exists()) listDirs(path, ret); Collections.sort(ret, new Comparator<File>() { @Override public int compare(File o1, File o2) { return o2.compareTo(o1); } }); return ret; } private static void listDirs(File path, List<File> list) { for (File f : path.listFiles()) { if (f.isDirectory()) { listDirs(f, list); list.add(f); } } } public static Set<File> listFiles(File path) { Set<File> set = Sets.newHashSet(); if (path.exists()) { listFiles(path, set); } return set; } private static void listFiles(File path, Set<File> set) { for (File f : path.listFiles()) { if (f.isDirectory()) listFiles(f, set); else set.add(f); } } public static void move(File oldFile, File newFile) { try { if (oldFile.exists() && !newFile.exists()) { org.apache.commons.io.FileUtils.moveFile(oldFile, newFile); } } catch (IOException e) { Logger.logWarn("Exception occurred while moving " + oldFile.toString() + " : " + e.getMessage()); } } }