for (File data : meta) {
String file = "";
file +=data.toURI().toURL();
filenames.add(file);
}
Collections.sort(filenames, new MetadatenHelper(null, null));
for (String f : filenames) {
url = url + f + "$";
}
String imageString = url.substring(0, url.length()-1);
String targetFileName = "&targetFileName=" + this.getProzess().getTitel()+".pdf";