Java Resource Path Get getResourceListing(Class clazz, String path)

Description

List directory contents for a resource folder.

License

Creative Commons License

Parameter

Parameter	Description
clazz	Any java class that lives in the same place as the resources you want.
path	Should end with "/", but not start with one.

Exception

Parameter	Description
URISyntaxException	an exception
IOException	an exception

Return

Just the name of each member item, not the full paths.

Declaration

public static String[] getResourceListing(Class<?> clazz, String path) throws URISyntaxException, IOException 

Method Source Code

//package com.java2s;
/**//from   w w w.  j a v a 2s.com
 * This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0
 * International License. http://creativecommons.org/licenses/by-nd/4.0/
 *
 * @author Wruczek
 */

import java.io.IOException;

import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLDecoder;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Set;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;

public class Main {
    /**
     * List directory contents for a resource folder. Not recursive. This is
     * basically a brute-force implementation.
     *
     * @author Greg Briggs
     * @param clazz
     *            Any java class that lives in the same place as the resources
     *            you want.
     * @param path
     *            Should end with "/", but not start with one.
     * @return Just the name of each member item, not the full paths.
     * @throws URISyntaxException
     * @throws IOException
     */
    public static String[] getResourceListing(Class<?> clazz, String path) throws URISyntaxException, IOException {
        URL dirURL = clazz.getClassLoader().getResource(path);

        if (dirURL == null) {
            String me = clazz.getName().replace(".", "/") + ".class";
            dirURL = clazz.getClassLoader().getResource(me);
        }

        if (dirURL.getProtocol().equals("jar")) {
            String jarPath = dirURL.getPath().substring(5, dirURL.getPath().indexOf("!"));
            JarFile jar = new JarFile(URLDecoder.decode(jarPath, "UTF-8"));
            Enumeration<JarEntry> entries = jar.entries();
            Set<String> result = new HashSet<String>();
            while (entries.hasMoreElements()) {
                String name = entries.nextElement().getName();
                if (name.startsWith(path)) {
                    String entry = name.substring(path.length());
                    int checkSubdir = entry.indexOf("/");
                    if (checkSubdir >= 0) {
                        entry = entry.substring(0, checkSubdir);
                    }
                    result.add(entry);
                }
            }
            jar.close();
            return result.toArray(new String[result.size()]);
        }

        throw new UnsupportedOperationException("Cannot list files for URL " + dirURL);
    }
}

Related

1. getResourceFile(String sResourcePath, Class cRefClass)
2. getResourceFilePath(String name)
3. getResourceFileRelativeToBase(final File baseDir, final String resourcePath)
4. getResourceListing(Class clazz, String path)
5. getResourceListing(Class clazz, String path)
6. getResourceListing(Class clazz, String path, String glob)
7. getResourcePath()
8. getResourcePath(Class clazz, String fileName)
9. getResourcePath(final Class bundleClazz, final String pathToFile)