Java Resource Load getResourceAsByteArray(String url)

Description

Retrieves a resource as a byte array.

License

Open Source License

Parameter

Parameter	Description
url	the URL of the resource within the JAR file, e.g. /resource.xml

Exception

Parameter	Description
IOException	when the resource could not be readTODO: This method should also handle file:// urls.

Return

the resource as byte array

Declaration

public static byte[] getResourceAsByteArray(String url) throws IOException 

Method Source Code

//package com.java2s;
/*/*ww w  . j av a  2 s. co m*/
 * Created on Jan 24, 2008 at 1:33:50 PM.
 * 
 * Copyright (c) 2010 Robert Virkus / Enough Software
 *
 * This file is part of J2ME Polish.
 *
 * J2ME Polish 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.
 * 
 * J2ME Polish 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 J2ME Polish; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * 
 * Commercial licenses are also available, please
 * refer to the accompanying LICENSE.txt or visit
 * http://www.j2mepolish.org for details.
 */

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;

public class Main {
    /**
     * Retrieves a resource as a byte array.
     * @param url the URL of the resource within the JAR file, e.g. /resource.xml
     * @return the resource as byte array
     * @throws IOException when the resource could not be read
     * TODO: This method should also handle file:// urls.
     */
    public static byte[] getResourceAsByteArray(String url) throws IOException {
        return toByteArray(url.getClass().getResourceAsStream(url));
    }

    /**
     * Retrieves a resource as a byte array.
     * @param in the input stream of the resource, the input stream will be closed automatically
     * @return the resource as byte array
     * @throws IOException when the resource could not be read
     */
    public static byte[] toByteArray(InputStream in) throws IOException {
        try {
            int bufferSize = in.available();
            if (bufferSize <= 0) {
                bufferSize = 8 * 1024;
            }
            byte[] buffer = new byte[bufferSize];
            ByteArrayOutputStream out = new ByteArrayOutputStream(bufferSize);
            int read;
            while ((read = in.read(buffer, 0, bufferSize)) != -1) {
                out.write(buffer, 0, read);
            }
            return out.toByteArray();
        } catch (IOException e) {
            throw e;
        } catch (Exception e) {
            throw new IOException(e.toString());
        } finally {
            if (in != null) {
                try {
                    in.close();
                } catch (Exception e) {
                    // ignore
                }
            }
        }
    }
}

Related

1. getResource(String propertiesPath)
2. getResource(String uri)
3. getResourceAbsolutePath(String pluginId, String... path)
4. getResourceAsBufferedReader(Class clazz, String resourceName)
5. getResourceAsByteArray(Object context, String resourceName)
6. getResourceAsBytes(Class cl, String resname)
7. getResourceAsBytes(Class testClass, String resourceName)
8. getResourceAsBytes(ClassLoader classLoader, String resourcePath)
9. getResourceAsBytes(String path, ClassLoader loader)