java: search file according to its name in directory and subdirectories

Question

I need a to find file according to its name in directory tree. And then show a path to this file. I found something like this, but it search according extension. Could anybody h

Answer 1

Recursive directory search in Java is pretty darn easy. The java.io.File class has a listFiles() method that gives all the File children of a directory; there's also an isDirectory() method you call on a File to determine whether you should recursively search through a particular child.

Answer 2

I don't really know what FileUtils does, but how about changing "txt" in extenstions to "yourfile.whatever"?

Answer 3

public class Test {
    public static void main(String[] args) {
        File root = new File("c:\\test");
        String fileName = "a.txt";
        try {
            boolean recursive = true;

            Collection files = FileUtils.listFiles(root, null, recursive);

            for (Iterator iterator = files.iterator(); iterator.hasNext();) {
                File file = (File) iterator.next();
                if (file.getName().equals(fileName))
                    System.out.println(file.getAbsolutePath());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

Answer 4

You can use FileFilter Like this.

public class MyFileNameFilter implements FilenameFilter {

@Override
public boolean accept(File arg0, String arg1) {
    // TODO Auto-generated method stub
    boolean result =false;
    if(arg1.startsWith("KB24"))
        result = true;
    return result;
}

}

And call it like this

File f = new File("C:\\WINDOWS");
    String []  files  = null;
    if(f.isDirectory()) {  

        files = f.list(new MyFileNameFilter());
    }

    for(String s: files) {

        System.out.print(s);
        System.out.print("\t");
    }

Answer 5

public static File find(String path, String fName) {
    File f = new File(path);
    if (fName.equalsIgnoreCase(f.getName())) return f;
    if (f.isDirectory()) {
        for (String aChild : f.list()) {
            File ff = find(path + File.separator + aChild, fName);
            if (ff != null) return ff;
        }
    }
    return null;
}