Java.nio.file.InvalidPathException: invalid input or input contains invalid characters when using national characters

Question

I am trying to create some directories with national symbols like "äöü", etc. Unfortunately, I get this exception whenever you try:

java.nio.file.InvalidPathException: Malformed input or input contains unmappable characters: /home/pi/myFolder/löwen
        at sun.nio.fs.UnixPath.encode(UnixPath.java:147)
        at sun.nio.fs.UnixPath.<init>(UnixPath.java:71)
        at sun.nio.fs.UnixFileSystem.getPath(UnixFileSystem.java:281)
        at java.nio.file.Paths.get(Paths.java:84)
        at org.someone.something.file.PathManager.createPathIfNecessary(PathManager.java:161)
...
        at java.lang.Thread.run(Thread.java:744)

My code, where it occurs, is as follows:

public static void createPathIfNecessary(String directoryPath) throws IOException {
        Path path = Paths.get(directoryPath);
        // if directory exists?
        if (!Files.exists(path)) {
            Files.createDirectories(path);
        } else if (!Files.isDirectory(path)) {
            throw new IOException("The path " + path + " is not a directory as expected!");
        }
    }

I searched for possible solutions, and most of them suggest setting the language standard in UTF-8, so I decided that I could get this fix if I installed the Linux locale on UTF-8, but I found out that it was already UTF -8 all the time, and despite the new setup, I still have the same problems.

 $ locale
LANG=en_US.UTF-8
LANGUAGE=
LC_CTYPE="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"
LC_ALL=

Windows 7, , , Java, - Linux.

Linux, , - Raspbian Pi 2:

$ cat /etc/*-release

    PRETTY_NAME="Raspbian GNU/Linux 7 (wheezy)"
    NAME="Raspbian GNU/Linux"
    VERSION_ID="7"
    VERSION="7 (wheezy)"
    ID=raspbian
    ID_LIKE=debian
    ANSI_COLOR="1;31"
    HOME_URL="http://www.raspbian.org/"
    SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
    BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"

Tomcat 7 Server ( Java 1.8, ), setenv.sh : export JAVA_OPTS="-Dfile.encoding=UTF-8 ...

- ? /...

EDIT:

Dsun.jnu.encoding = UTF-8 setenv.sh Tomcat - .

setenv.sh

export JAVA_OPTS="-Dsun.jnu.encoding=UTF-8 -Dfile.encoding=UTF-8 

, , , , , , , / , :

java.io.FileNotFoundException: /home/pi/myFolder/löwen/Lowen.tmp (No such file or directory)
        at java.io.FileOutputStream.open(Native Method)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:206)
        at java.io.FileOutputStream.<init>(FileOutputStream.java:156)
        at org.someone.something.MyFileWriter.downloadFiles(MyFileWriter.java:364)
        ...
        at java.lang.Thread.run(Thread.java:744)

, , :

// output here
File myOutputFile = new File(filePath);
FileOutputStream out = (new FileOutputStream(myOutputFile));
out.write(bytes);
out.close();

, ( FileOutputStream (myOutputFile)); FileOutputStream File, , , , .

, , - - , , .

, , , setenv.sh, , ...

Answer 1

, . vim:

vim SourceClassWithHardcodedCharacters.java
:set fileencoding=utf-8<Enter>
:w<Enter>

, ( "unmappable character (...)" ).

1. , 2. - .