scan series of folders in JAVA

Question

I have series of folders, inside which there are files to be processed.Inside each folder, there are maybe other sub-folders as well, which are to be scanned. I wish to know if there is any way to do that. Whatever open-source code I could find, they were all for scanning only 1 folder.

The directory structure (rough sketch) in my case is as follows:

So far, I just got this:

public static void directory(File dir){
File[] files = dir.listFiles();
for(File file:files){
    System.out.println(file.getAbsolutePath());
    if(file.listFiles() != null)
        directory(file);        
}}

Please Help !

possible duplicate of http://stackoverflow.com/questions/2056221/recursively-list-files-in-java — Filipp Voronov, Aug 20 '15 at 20:32
"*I wish to know if there is any way to do that*" yes is a way. Try recursion like `scan(File f){ for each element in directory (if element is directory){scan(element)} else {handle(element)}}`. — Pshemo, Aug 20 '15 at 20:34
the above link is for listing files in a single directory.. I have multiple directories, and that's where I am stuck.. — Arnab, Aug 20 '15 at 20:35
@Mureinik right now, I am only able to scan only one directory, I cannot go inside the sub-directories. — Arnab, Aug 20 '15 at 20:37
since Java 7 http://stackoverflow.com/a/3154643/1393766, since Java 8 http://stackoverflow.com/a/24006711/1393766 — Pshemo, Aug 20 '15 at 20:48

score 0 · Answer 1 · answered Aug 20 '15 at 20:33

You can have something like this.

public void listfiles(String directoryURL, List<File> fileList) {
    File directory = new File(directoryURL);
    File[] fileArray = directory.listFiles();
    for (File file : fileArray) {
        if (file.isFile()) {
            fileList.add(file);
        } else if (file.isDirectory()) {
            listf(file.getAbsolutePath(), fileList);
        }
    }
}

scan series of folders in JAVA

1 Answers1