Java Utililty Methods File Name Create

List of utility methods to do File Name Create

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Description

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

Method

StringgenerateFileId(String userlogin)
generate File Id 
String pattern = "yyyyMMddHHmmssSSS";
DateFormat df = new SimpleDateFormat(pattern);
String timestamp = df.format(new Date());
return userlogin + "_" + timestamp;
StringgenerateFileName()
Generates and returns a new file name by appending the current date in front of the file name 

formatter = new SimpleDateFormat("yyyy-MM-dd");
return formatter.format(Calendar.getInstance().getTime()) + "_Giant.xls";
StringgenerateFileName()
generate File Name 
return generateFileName("", ".txt");
StringgenerateFileName(String fileName)
generate File Name 
DateFormat format = new SimpleDateFormat("yyMMddHHmmss");
String formatDate = format.format(new Date());
int random = new Random().nextInt(10000);
int position = fileName.lastIndexOf(".");
String extension = fileName.substring(position);
return formatDate + random + extension;
StringgenerateFileNameWithoutExtension(final String testClassName, final String testId, final boolean includeDate)
generate File Name Without Extension 
StringBuilder sb = new StringBuilder(testClassName);
if (testId != null) {
    sb.append("_").append(testId);
if (includeDate) {
    sb.append("_");
    SimpleDateFormat dateFormat = new SimpleDateFormat("YYYYMMddHHmmss");
    String formattedDate = dateFormat.format(new Date());
...
StringgetRandomFileName(@Nullable final String prefix)
Generate a random filename with a specified prefix. 
final Date now = new Date(System.currentTimeMillis());
String dateStr = null;
synchronized (DATE_FORMAT) {
    dateStr = DATE_FORMAT.format(now);
if ((prefix == null) || (prefix.length() == 0)) {
    return dateStr;
} else {
...
StringtoFileName(final Object obj)
to File Name 
return obj.toString().replaceAll("[^a-zA-Z0-9_.-]", "_");
StringtoFileName(String address)
to File Name 
StringBuilder builder = new StringBuilder();
int i = 0;
while (i < address.length()) {
    char c = address.charAt(i);
    if (Character.isLetterOrDigit(c)) {
        builder.append(c);
    } else {
        builder.append('_');
...
StringtoFileName(String className)
Convert the Java-class-name (dot delimited package name)to the equivalent Java-class-file-name . 
StringBuffer fileName;
if (className == null) {
    throw new IllegalArgumentException("null 'className' arg in method call.");
className = className.trim();
if (className.equals("")) {
    throw new IllegalArgumentException("empty 'className' arg in method call.");
fileName = new StringBuffer(className);
if (className.endsWith(".class") && className.length() > 6) {
    fileName.setLength(className.length() - 6);
for (int i = 0; i < fileName.length(); i++) {
    if (fileName.charAt(i) == '.') {
        fileName.setCharAt(i, '/');
fileName.append(".class");
return fileName.toString();
StringtoFilename(String filenameOrURI)
Turn a file: URL or file name into a plain file name 
if (!isFile(filenameOrURI))
    return null;
String fn = filenameOrURI;
if (!fn.startsWith("file:"))
    return fn;
if (fn.startsWith("file:///"))
    fn = fn.substring("file://".length());
else if (fn.startsWith("file://localhost/"))
...