是否可以用Java写入隐藏文件？

Question

I have figured out how to create a hidden file in Java, now I need to write large amounts of data to the file. I keep getting the following exception: SEVERE: java.io.FileNotFoundException: <filepath>\\tmp (Access is denied)

Here are two approaches I took to get try and get a solution, but I get the same exception for both approaches. Note: toOverwrite is the hidden file in both cases.

File fileByteText = new File("./testFile.txt");
File toOverwrite = new File("./tmp");
//Assume toOverwrite is hidden

boolean toReturn = true;
    try {
        byte[] fileByteText = FileUtils.readFileToByteArray(toGetTextFrom);
                    FileUtils.writeByteArrayToFile(toOverwrite, fileByteText,    false);
                    toReturn = false;
                } catch (IOException e) {
                    bam.severe(e);
                    toReturn = true;
                }

Approach two using the same file objects:

try {
                String fileText = FileUtils.readFileToString(toGetTextFrom);
                FileWriter fw = new FileWriter(toOverwrite.getAbsoluteFile());
                BufferedWriter bw = new BufferedWriter(fw);
                bw.write(fileText);
                bw.close();
                toReturn = false;
            } catch (IOException e1) {
                bam.severe(e1);
                toReturn = true;
            }

Answer 1

You can get an Exception when you try to write to a file of type directory. Check what method toOverWrite.isFile() returns;

if false you cannot write.

Answer 2

There is no magic in Unix. Just prepend a . to your filename. Under Windows, this cannot be achieved with Java. You need native commands. May this works with NIO2.