java – 无法将中文字符写入文件名

public static void main(String[] args) throws IOException
{
    Scanner in = new Scanner(System.in);
    String fileName = in.nextLine();

    Writer out = new BufferedWriter(new OutputStreamWriter(
            new FileOutputStream("C:/temp/"+fileName+".txt"),"UTF-8"));//Ex thrown
    out.close();
}

我正在尝试创建一个可以处理中文字符到文件名的编写器.所以我可以创建一个名为你好.txt的文件.

但是我得到了一个带有上述代码的FileNotFoundException,它对英文字符完全正常,但不适用于中文字符.

我按照这里的答案：How to write a UTF-8 file with Java?生成上面的代码,但它不起作用.

任何人都知道如何实现这一目标？

堆栈跟踪：

Exception in thread "main" java.io.FileNotFoundException: C:temp??.txt (The filename,directory name,or volume label syntax is incorrect)
    at java.io.FileOutputStream.open0(Native Method)
    at java.io.FileOutputStream.open(Unknown Source)
    at java.io.FileOutputStream.<init>(Unknown Source)
    at java.io.FileOutputStream.<init>(Unknown Source)

使用NIO：

Path path = Paths.get("C:/temp/"+fileName+".txt");//throws ex
Charset charset = Charset.forName("UTF-8");
Path file = Files.createFile(path);
BufferedWriter  bufferedWriter = Files.newBufferedWriter(file,charset);
bufferedWriter.close();

堆：

Exception in thread "main" java.nio.file.InvalidPathException: Illegal char <?> at index 8: C:/temp/?.txt
    at sun.nio.fs.WindowsPathParser.normalize(Unknown Source)
    at sun.nio.fs.WindowsPathParser.parse(Unknown Source)
    at sun.nio.fs.WindowsPathParser.parse(Unknown Source)
    at sun.nio.fs.WindowsPath.parse(Unknown Source)
    at sun.nio.fs.WindowsFileSystem.getPath(Unknown Source)
    at java.nio.file.Paths.get(Unknown Source)