Here you can find the source of getRelativeFileName(File file, File basedir)
Parameter | Description |
---|---|
filename | The filename to build a relative file from |
basedir | The base directory for a relative filename |
Parameter | Description |
---|---|
IOException | if the file paths cannot be canonicalized |
public static String getRelativeFileName(File file, File basedir) throws IOException
//package com.java2s; /*/*from w w w. j a v a2s . c o m*/ * IzPack - Copyright 2001-2008 Julien Ponge, All Rights Reserved. * * http://izpack.org/ * http://izpack.codehaus.org/ * * Copyright 2005 Marc Eppelmann * * 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. */ import java.io.*; public class Main { /** * Gets a relative file from a filename against a base directory. * Enclosed '.' and '..' characters are resolved for all parameters. * * @param filename The filename to build a relative file from * @param basedir The base directory for a relative filename * @return The relative file name, or null, if one input parameter was null * @throws IOException if the file paths cannot be canonicalized */ public static String getRelativeFileName(File file, File basedir) throws IOException { String canonicalFilePath = file.getCanonicalPath(); String canonicalBaseDirPath = basedir.getCanonicalPath(); if (canonicalFilePath.startsWith(canonicalBaseDirPath)) { int length = canonicalBaseDirPath.length(); if (length < canonicalFilePath.length()) { return canonicalFilePath.substring(length + 1); } } return null; } }