Java Utililty Methods URL to File Name

try {
    if (!url.startsWith("file://.")) {
        java.net.URI fileURI = new java.net.URI(url);
        return new File(fileURI);
} catch (java.net.URISyntaxException urise) {
    throw new IllegalArgumentException("Bad URL, cannot process " + url);
return new File(base, url.substring("file://.".length()));

if (validFileUrl(urlPath)) {
    try {
        URL url = new URL(urlPath);
        try {
            return new File(url.toURI());
        } catch (Exception t) {
            return new File(url.getPath());
    } catch (MalformedURLException e) {
        return new File(urlPath);
return null;

return new File(url.toURI());

try {
    return new File(url.toURI());
} catch (URISyntaxException e) {
    throw new IllegalArgumentException(String.format("URL contains an invalid URI syntax: %s", url), e);

File tmpImage = File.createTempFile("tesseract-ocr-download", null);
InputStream in = url.openConnection().getInputStream();
FileOutputStream fos = new FileOutputStream(tmpImage);
byte[] buf = new byte[1024];
int len = 0;
while ((len = in.read(buf)) != -1) {
    fos.write(buf, 0, len);
fos.flush();
fos.close();
return tmpImage;

try {
    return new File(URLDecoder.decode(urlToDecode.getFile(), "UTF-8"));
} catch (UnsupportedEncodingException e) {
    e.printStackTrace();
    return null;

return getFileName(toURL(url));

final String urlString = url.toString();
return urlString.substring(urlString.lastIndexOf('/') + 1, urlString.length());

int index = url.toString().lastIndexOf('/');
if (index < 0) {
    return url.toString();
} else {
    return url.toString().substring(index + 1);

String filename = url.toString();
int index = filename.lastIndexOf('/');
if (index >= 0) {
    filename = filename.substring(index + 1);
if (maxLength > 0 && filename.length() > maxLength) {
    filename = filename.substring(filename.length() - maxLength);
return filename;