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A-Jetty Base can run on Android Java as well as on standard Java 7+ and it can run precompiled JSP/JSTL.

There is a newer version: 1.0.5

//
//  ========================================================================
//  Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
//  ------------------------------------------------------------------------
//  All rights reserved. This program and the accompanying materials
//  are made available under the terms of the Eclipse Public License v1.0
//  and Apache License v2.0 which accompanies this distribution.
//
//      The Eclipse Public License is available at
//      http://www.eclipse.org/legal/epl-v10.html
//
//      The Apache License v2.0 is available at
//      http://www.opensource.org/licenses/apache2.0.php
//
//  You may elect to redistribute this code under either of these licenses.
//  ========================================================================
//

package org.eclipse.jetty.deploy.util;

import java.io.File;
import java.util.Locale;

/**
 * Simple, yet surprisingly common utility methods for identifying various file types commonly seen and worked with in a
 * deployment scenario.
 */
public class FileID
{
    /**
     * Is the path a Web Archive?
     * 
     * @param path
     *            the path to test.
     * @return True if a .war or .jar or exploded web directory
     * @see FileID#isWebArchiveFile(File)
     */
    public static boolean isWebArchive(File path)
    {
        if (path.isFile())
        {
            String name = path.getName().toLowerCase(Locale.ENGLISH);
            return (name.endsWith(".war") || name.endsWith(".jar"));
        }

        File webInf = new File(path,"WEB-INF");
        File webXml = new File(webInf,"web.xml");
        return webXml.exists() && webXml.isFile();
    }

    /**
     * Is the path a Web Archive File (not directory)
     * 
     * @param path
     *            the path to test.
     * @return True if a .war or .jar file.
     * @see FileID#isWebArchive(File)
     */
    public static boolean isWebArchiveFile(File path)
    {
        if (!path.isFile())
        {
            return false;
        }

        String name = path.getName().toLowerCase(Locale.ENGLISH);
        return (name.endsWith(".war") || name.endsWith(".jar"));
    }

    public static boolean isXmlFile(File path)
    {
        if (!path.isFile())
        {
            return false;
        }

        String name = path.getName().toLowerCase(Locale.ENGLISH);
        return name.endsWith(".xml");
    }
}