Java File to URL fileToURL(File file)

Description

A replacement for File.toURI().toURL().

License

Open Source License

Parameter

Parameter	Description
file	a parameter

Return

URL

Declaration

public static URL fileToURL(File file) 

Method Source Code

//package com.java2s;
/*//w  ww  .j a  va 2  s.  c  om
 *    GeoTools - The Open Source Java GIS Toolkit
 *    http://geotools.org
 * 
 *    (C) 2012, Open Source Geospatial Foundation (OSGeo)
 *    
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation;
 *    version 2.1 of the License.
 *
 *    This library 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
 *    Lesser General Public License for more details.
 */

import java.io.File;

import java.net.MalformedURLException;
import java.net.URL;

public class Main {
    /**
     * A replacement for File.toURI().toURL().
     * <p>
     * The handling of file.toURL() is broken; the handling of file.toURI().toURL() is known to be
     * broken on a few platforms like mac. We have the urlToFile( URL ) method that is able to
     * untangle both these problems and we use it in the geotools library.
     * <p>
     * However occasionally we need to pick up a file and hand it to a third party library like EMF;
     * this method performs a couple of sanity checks which we can use to prepare a good URL
     * reference to a file in these situtations.
     * 
     * @param file
     * @return URL
     */
    public static URL fileToURL(File file) {
        try {
            URL url = file.toURI().toURL();
            String string = url.toExternalForm();
            if (string.contains("+")) {
                // this represents an invalid URL created using either
                // file.toURL(); or
                // file.toURI().toURL() on a specific version of Java 5 on Mac
                string = string.replace("+", "%2B");
            }
            if (string.contains(" ")) {
                // this represents an invalid URL created using either
                // file.toURL(); or
                // file.toURI().toURL() on a specific version of Java 5 on Mac
                string = string.replace(" ", "%20");
            }
            return new URL(string);
        } catch (MalformedURLException e) {
            return null;
        }
    }
}

Related

1. fileToURL(File file)
2. fileToUrl(File file)
3. FileToURL(File file)
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