Get an attribute value from Manifest - Java Reflection

Java examples for Reflection:Jar

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Description

Get an attribute value from Manifest

Demo Code

/*//from w w w . j a  va 2s. c o m
 * Lucane - a collaborative platform
 * Copyright (C) 2004 Vincent Fiack <vfiack@mail15.com>
 *
 * 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; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * 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.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
//package com.java2s;
import java.io.IOException;
import java.util.jar.Attributes;
import java.util.jar.JarFile;

public class Main {
    /**
     * Get an attribute value
     * 
     * @param jarUrl the jar file
     * @param attribute the attribute to fetch
     * @return the attribute value
     */
    private static String getManifestAttribute(String jarUrl,
            String attribute) throws IOException {
        JarFile jar = new JarFile(jarUrl);
        Attributes attr = jar.getManifest().getMainAttributes();
        String value = attr.getValue(attribute);

        jar.close();
        return value;
    }
}

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