/**
* return a free file name. if file exist add a number as suffix.
*
* @param file
* @return
*/
public static synchronized File getFreeFileName(File file) {
if (!file.exists()) {
return file;
}
File folder = file.getParentFile();
String newName = file.getName();
String ext = StringHelper.getFileExtension(file.getName());
String fileName = StringHelper.getFileNameWithoutExtension(file.getName());
for (int i = 1; i < 999999; i++) {
newName = fileName + "_" + i + '.' + ext;
File newFile = new File(URLHelper.mergePath(folder.getAbsolutePath(), newName));
if (!newFile.exists()) {
return newFile;
}
}
return null;
}
