Java Utililty Methods URL to File Name

List of utility methods to do URL to File Name

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Description

The list of methods to do URL to File Name are organized into topic(s).

Method

FilegetFile(URL url)
Resolves a File from URL . 
if (url == null) {
    return null;
if ("file".equals(url.getProtocol())) {
    return new File(url.getFile());
return null;
FilegetFile(URL url)
get File 
if (url != null) {
    if ("file".equalsIgnoreCase(url.getProtocol())) {
        return new File(url.toString().substring(5));
return null;
FilegetFile(URL url, String description)
get File 
if (!URL_PROTOCOL_FILE.equals(url.getProtocol())) {
    throw new FileNotFoundException(description + " cannot be resolved to absolute file path "
            + "because it does not reside in the file system: " + url);
try {
    return new File(url.toURI().getSchemeSpecificPart());
} catch (URISyntaxException ex) {
    return new File(url.getFile());
...
StringgetFileAbsoluteURL(String[] directoryPaths, String fileName)
get File Absolute URL 
File fileToReturn = null;
String fullPathNameToReturn = null;
int numFound = 0;
File file = new File(fileName);
if (file.isAbsolute() && file.exists() && file.isFile() && file.canRead()) {
    numFound = 1;
    fileToReturn = file;
    try {
...
longgetFileDateTime(URL url)
Gets file date and time. 
if (url == null) {
    return -1;
String fileName = url.getFile();
if (fileName.charAt(0) == '/' || fileName.charAt(0) == '\\') {
    fileName = fileName.substring(1, fileName.length());
try {
...
StringgetFileExtensionByURL(URL url)
Returns the file extension from the file part of the URL. 
String trimFile = url.getFile().trim();
if (trimFile == null || trimFile == "" || trimFile == "/") {
    return null;
int strIndex = trimFile.lastIndexOf("/");
String filePart = trimFile.substring(strIndex + 1, trimFile.length());
strIndex = filePart.lastIndexOf(".");
if (strIndex == -1 || strIndex == filePart.length() - 1) {
...
FilegetFileFor(URL url1)
get File For 
if (urlFileMap == null)
    urlFileMap = new HashMap();
if (urlFileMap.get(url1) != null)
    return (File) urlFileMap.get(url1);
File newFile = new File(url1.getFile());
urlFileMap.put(url1, newFile);
return newFile;
FilegetFileForURL(String url)
get File For URL 
if (!url.startsWith("file:/")) {
    url = "file:/" + url;
url = url.replaceAll("%20", " ");
try {
    return new File((new URL(url)).getFile());
} catch (MalformedURLException e) {
    throw new RuntimeException(e);
...
FilegetFileForUrl(URL url)
Return the File referenced by a "file:" or "jar:file:" URL. 
return (url == null ? null : getFileForUrl(url.toString()));
FilegetFileFrom(final URL url)
get File From 
if (url != null) {
    final String resourceAsString = url.toExternalForm();
    if (resourceAsString.startsWith("file:/")) {
        final int startIndex = isWindows() ? 6 : 5;
        final String fileName = resourceAsString.substring(startIndex);
        final File file = new File(fileName);
        return file;
return null;