Parse the String
Hi,
Below code is Gets a directory list from the server and parses
the elements into a list of files and a list of subdirectories.
I had one problem now is getting a whole string of all those file names and I need to parse it out.
Could anyone know how to change the code below to parse it out the string line by line.
I appreciate it.
Thanks,
chen
private boolean getAndParseDirList(String params, StringBuffer files, StringBuffer dirs)
throws IOException
{
// reset the return variables (we're using StringBuffers instead of
// Strings because you can't change a String value and pass it back
// to the calling routine -- changing a String creates a new object)
files.setLength(0);
dirs.setLength(0);
// get the NLST and the LIST -- don't worry if the commands
// don't work, because we'll just end up sending nothing back
// if that's the case
String shortList = processFileListCommand("nlst " + params);
String longList = processFileListCommand("list " + params);
// tokenize the lists we got, using a newline as a separator
StringTokenizer sList = new StringTokenizer(shortList, "\n");
StringTokenizer lList = new StringTokenizer(longList, "\n");
// other variables we'll need
String sString;
String lString;
// assume that both lists have the same number of elements
while ((sList.hasMoreTokens()) && (lList.hasMoreTokens())) {
sString = sList.nextToken();
lString = lList.nextToken();
if (lString.length() > 0)
{
if (lString.startsWith("d"))
{
dirs.append(sString.trim() + lineTerm);
debugPrint("Dir: " + sString);
} else if (lString.startsWith("-")) {
files.append(sString.trim() + lineTerm);
debugPrint("File: " + sString);
} else {
// actually, symbolic links will start with an "l"
// (lowercase L), but we're not going to mess with
// those
debugPrint("Unknown: " + lString);
}
}
}
// strip off any trailing line terminators and return the values
if (files.length() > 0) { files.setLength(files.length() - lineTerm.length()); }
if (dirs.length() > 0) { dirs.setLength(dirs.length() - lineTerm.length()); }
return true;
}
