不能将中文字符写入文件名 [英] Cannot write chinese characters to a filename

问题描述

  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抛出
 out.close（）; 
 
 $ / code> 

我正在创建一个可以处理中文字符的文件名称。所以我可以创建一个名为你好.txt 的文件。

但是我得到一个 FileNotFoundException 与上面的代码，它适用于英文字符，但不适用于中文字符。

我遵循这里的答案：如何用Java编写一个UTF-8文件？生产上面的代码，但它不起作用。

任何人都知道我该怎么做到这一点？

堆栈跟踪：

 线程main中的异常java.io.FileNotFoundException：C：\temp\\\.txt （文件名，目录名称或卷标语法不正确）
在java.io.FileOutputStream.open0（本地方法）
在java.io.FileOutputStream.open（未知源）
 < init>（Unknown Source）
在java.io.FileOutputStream。< init>（Unknown Source）
   b 
 $ b 
使用NIO：
 
 
  Path path = Paths.get（C：/ temp / + fileName +.txt）; // throws ex 
 Charset charset = Charset.forName（UTF-8）; 
路径文件= Files.createFile（path）; 
 BufferedWriter bufferedWriter = Files.newBufferedWriter（file，charset）; 
 bufferedWriter.close（）; 
  
堆叠： 
 
 
 线程main中的异常java.nio.file.InvalidPathException：Illegal char<？>在索引8处：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来源）
在java.nio.file.Paths.get（未知来源）
  
 
 
解决方案
我发现这个问题与eclipse控制台的字符编码有关，与 Java 没有关系。 
 
 
 
我使用了相同的代码，并使用运行配置，如下所示，
 
 
 
  
 
 
 
现在运行程序后，在线程main中的异常java.io.FileNotFoundException：C：\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\名称或卷标语法不正确）
在java.io.FileOutputStream.open（本地方法）
在java.io.FileOutputStream。< init>（FileOutputStream.java:206）$ b $ （FileOutputStream.java:95）
 at Test.main（Test.java:21）
  

结论 ：此处为 ISO-8859-1 编码在运行配置 Scanner 中将无法读取这些字符p因为控制台具有不同的字符编码，所以你将有 ?? 作为文件名。

请更改您的控制台的字符编码，我坚信您正在使用一些IDE。可能是你已经改变了，或者你的控制台继承了字符编码，而不是对这些字符进行编码。

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();
}

I'm trying to create a writer that can handle chinese characters to the file name. So I can create a file called 你好.txt for example.

However I get a FileNotFoundException with the above code, it works perfectly fine for English characters but not with Chinese characters.

I followed the answers here: How to write a UTF-8 file with Java? to produce the above code but it doesn't work.

Anyone know how can I accomplish this?

Stack Trace:

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)

Using 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();

Stack:

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)

解决方案

I have found out that this problem is related to the character encoding of eclipse console and not related to the Java.

I have used the same code and used Run Configuration differently as shown below,

Now after running the program I got following output in my console,

Exception in thread "main" java.io.FileNotFoundException: C:\temp\??.txt (The filename, directory name, or volume label syntax is incorrect)
    at java.io.FileOutputStream.open(Native Method)
    at java.io.FileOutputStream.<init>(FileOutputStream.java:206)
    at java.io.FileOutputStream.<init>(FileOutputStream.java:95)
    at Test.main(Test.java:21)

Conclusion : Here for ISO-8859-1 encoding in run configuration Scanner will not be able to read those character properly from console because console has different character encoding and you will have ?? as a filename.

Please change character encoding for your console, I firmly believe you are using some IDE. May be you have changed or your console inherited character encoding which is not suppose to encode those characters.

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