Java URL Relative getRelativeUrl(File basePath, File targetPath)

Description

get Relative Url

License

Open Source License

Declaration

public static String getRelativeUrl(File basePath, File targetPath) 

Method Source Code

//package com.java2s;
/*/*from   w ww  .  jav a  2 s .  c  o  m*/
 * Created 2006/07/09
 * Copyright (C) 2003-2006  Naoki Iwami (naoki@limy.org)
 *
 * This file is part of limy-portal.
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 * 
 * 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

import java.io.File;

public class Main {

    public static String getRelativeUrl(File basePath, File targetPath) {

        String baseAbsPath = basePath.getAbsolutePath();
        String targetAbsPath = targetPath.getAbsolutePath();
        return getRelativeUrl(baseAbsPath, targetAbsPath);
    }

    public static String getRelativeUrl(String orgBaseDir, String orgTargetPath) {
        String basePath = orgBaseDir.replace('\\', '/');
        String targetPath = orgTargetPath.replace('\\', '/');
        if (targetPath.startsWith(basePath + "/")) {
            return targetPath.substring(basePath.length() + 1);
        }
        StringBuilder result = new StringBuilder();

        int reverseNo = 0;
        while (basePath.length() > 0 && !targetPath.startsWith(basePath + "/")) {
            if (basePath.lastIndexOf('/') >= 0) {
                basePath = basePath.substring(0, basePath.lastIndexOf('/'));
            } else {
                basePath = "";
            }
            result.append("../");
            ++reverseNo;
        }
        if (basePath.length() == 0) {
            return result.toString() + targetPath;
        }
        return result.toString() + targetPath.substring(basePath.length() + 1);
    }
}

Related

1. getRelativeNameOrURL(File baseDir, File file)
2. getRelativeURI(File fromFile, File toFile)
3. getRelativeURL(File base, File file)
4. getRelativeURLAsStream(Class clazz, String fileName)