Java - Copy resources from classpath onto a temporary directory

Resources.java

import java.io.File;
import java.io.IOException;
import java.net.URL;
import org.apache.commons.io.FileUtils;

public class Resource {
    private static java.net.URLStreamHandler cp = new org.ops4j.pax.url.classpath.Handler();

    private final URL url;
    private final String paths[];

    public Resource(String resource) throws IOException {
        this.url = new URL(null, "classpath:" + resource, cp);
        this.paths = url.getPath().split("[\\\\/]");
    }

    public URL asURL() {
        return url;
    }

    /**
     * Creates a temporary directory out of a resource.
     */
    public File asTmpDir() throws IOException {
        return asTmpDir(paths);
    }

    /**
     * Creates a temporary file out of a resource.
     */
    public File asTmpFile() throws IOException {
        File dir  = asTmpDir(java.util.Arrays.copyOfRange(paths, 0, paths.length - 1));
        File file = new File(dir.getAbsolutePath(), paths[paths.length-1]);
        FileUtils.copyURLToFile(url, file);
        return file;
    }

    private File asTmpDir(String[] items) throws IOException {
        StringBuilder sb = new StringBuilder();
        sb.append(System.getProperty("java.io.tmpdir"));
        sb.append('/').append(java.lang.management.ManagementFactory.getRuntimeMXBean().getName());
        for (String item : items) sb.append(item).append('/');
        File dir = new File(sb.toString());
        dir.mkdirs();
        return dir;
    }

}