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   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
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package org.apache.poi.openxml4j.opc.internal;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.channels.FileChannel;

Provide useful method to manage file.
Author:Julien Chable
Version:0.1
/** * Provide useful method to manage file. * * @author Julien Chable * @version 0.1 */
public final class FileHelper {
Get the directory part of the specified file path.
Params:
  • f – File to process.
Returns:The directory path from the specified
/** * Get the directory part of the specified file path. * * @param f * File to process. * @return The directory path from the specified */
public static File getDirectory(File f) { if (f != null) { String path = f.getPath(); int num2 = path.length(); while (--num2 >= 0) { char ch1 = path.charAt(num2); if (ch1 == File.separatorChar) { return new File(path.substring(0, num2)); } } } return null; }
Copy a file.
Params:
  • in – The source file.
  • out – The target location.
Throws:
/** * Copy a file. * * @param in * The source file. * @param out * The target location. * @throws IOException * If an I/O error occur. */
public static void copyFile(File in, File out) throws IOException { try (FileInputStream fis = new FileInputStream(in); FileOutputStream fos = new FileOutputStream(out); FileChannel sourceChannel = fis.getChannel(); FileChannel destinationChannel = fos.getChannel()) { sourceChannel.transferTo(0, sourceChannel.size(), destinationChannel); } }
Get file name from the specified File object.
/** * Get file name from the specified File object. */
public static String getFilename(File file) { if (file != null) { String path = file.getPath(); int len = path.length(); int num2 = len; while (--num2 >= 0) { char ch1 = path.charAt(num2); if (ch1 == File.separatorChar) return path.substring(num2 + 1, len); } } return ""; } }