FileOutputStream throws FileNotFoundException if file has cyrillic in path

Question

I'm trying to write text to file.

If I use file = "C:\Temp\Dir\Test.txt", then I have no problem

If I use file with cyrillic in path = "C:\Temp\Папка на русском\Test.txt", then I have exception

Note. directories aren't created before code running

public Boolean writeStringToFile(String content, File file) {
    status = false;
    try (FileOutputStream fos = new FileOutputStream(file, false);
                    OutputStreamWriter osw = new OutputStreamWriter(fos, "UTF-8");
                    BufferedWriter fileWriter = new BufferedWriter(osw)) {
        fileWriter.write(content);
        status = true;
    } catch (FileNotFoundException e) {
        logger.error("File {}/{} can not be created.", file.getPath(), file.getName(), e);
    }
    return status;
}

for testing:

writeStringToFile("writeStringToFile is ok. Кодировка UTF-8", 
    new File(Files.temporaryFolderPath() + "Папка на русском" + File.separator + "Test.txt"))
assertTrue(file.exists());

this is expected behavior, just dont use cyrillic in file name or path — Vault23, Oct 08 '19 at 11:51
please post [mcve] (e.g. "C:\Temp..." is not a valid java string) — user85421, Oct 08 '19 at 12:07
@Vault23 really? based on what? working fine for me (using "C:\\tmp\\Папка на русском\\A1.txt" and having directoies already created) — user85421, Oct 08 '19 at 12:16
@Vault23 works for me too. JDK 13 on Windows 10 and I also created the directories via Java code. — Abra, Oct 08 '19 at 12:43
[Create whole path automatically when writing to a new file](https://stackoverflow.com/questions/2833853/create-whole-path-automatically-when-writing-to-a-new-file) — Abra, Oct 08 '19 at 12:52
Most likely, your file was saved with an encoding which is different from the encoding the compiler expects. For instance, if you saved the file as an ISO 8859-5 file, but the compiler expects all source files to be UTF-8 files, you would get a FileNotFoundException, because the compiler interpreted the String in your source differently. — VGR, Oct 08 '19 at 15:50
So I'm understand now, problem is creating new file in path with cyrillic symbols using BufferedWriter. Thanks — Oleg, Oct 09 '19 at 12:20

score 0 · Answer 1 · answered Oct 09 '19 at 13:09

In the "..." the backslashes must be escaped as \\ or replaced by /.
The java compiler must use the same encoding as the editor, for String literals. You can test this by replacing "Папка" with u-escaped "\u041F\u0430\u043F\u043A\u0430".

Directories must be created.

    Path path = Paths.get("C:\\Temp\\Папка на русском\\Test.txt");
    Files.createDirectories(path.getParent());
    Files.write(path,
        "C:\\Temp\\Папка на русском\\Test.txt".getBytes(StandardCharsets.UTF_8));

    writeStringToFile( "C:\\Temp\\Папка на русском\\Test.txt",
        new File( "C:\\Temp\\Папка на русском\\Test2.txt"));

score -1 · Answer 2 · answered Oct 08 '19 at 12:24

-1

Invalid file path. Use "C:\Temp\Папка на русском\Test.txt".

Read please: https://docs.oracle.com/javase/tutorial/essential/io/pathOps.html

It's best to write a cross-platform path (for *nix and Windows OS)

answered Oct 08 '19 at 12:24

Dmitry Rakovets

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1
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I also initially got _Invalid file path_ because the directory didn't exist when I ran my code. Then I changed my code so that it also created the directory if it didn't exist and the program ran without exception, i.e. it created the directory and the file. I would say your answer is more of a recommendation and does not answer the OP's question as to why he failed to create the file in his java code. – Abra Oct 08 '19 at 12:48
also be aware that given link is about the `Path` class (`java.nio`), OP is using `File` (`java.io`) - this does not invalidate this *answer* ("write cross-platform path" could be explained...) – user85421 Oct 08 '19 at 14:01

FileOutputStream throws FileNotFoundException if file has cyrillic in path

2 Answers2