java.io.IOException可能的原因是什么：“文件名，目录名或卷标语法不正确” [英] What are possible reasons for java.io.IOException: "The filename, directory name, or volume label syntax is incorrect"

问题描述

 文件targetFile =新建文件（targetPath + File.separator） +文件名）; 
 ... 
 targetFile.createNewFile（）; 
 fileInputStream = new FileInputStream（fileToCopy）; 
 fileOutputStream = new FileOutputStream（targetFile）; 
 byte [] buffer = new byte [64 * 1024]; 
 int i = 0; 
 while（（i = fileInputStream.read（buffer））！= -1）{
 fileOutputStream.write（buffer，0，i）; 
} 
  

对于一些用户， targetFile.createNewFile 导致这个异常：

  java.io.IOException：文件名，目录名或卷标语法是java.io.WinNTFileSystem.createFileExclusively（Native Method）上的
 $ java.io.File.createNewFile（File.java:850）
 
  

文件名和目录名称似乎是正确的。在执行复制代码之前，目录 targetPath 甚至被检查，文件名如下所示： AB_timestamp.xml

用户对 targetPath 具有写入权限，可以使用操作系统复制文件而不会出现问题。

由于我无法访问机器，所以发生这种情况，并且无法在自己的机器上重现问题，我转向您提示此异常的原因。

解决方案

尝试这样做，因为在目标路径和文件名之间的路径中更多地调整目录分隔符：

 文件targetFile = new File（targetPath，filename）; 
  

I am trying to copy a file using the following code:

File targetFile = new File(targetPath + File.separator + filename);
...
targetFile.createNewFile();
fileInputStream = new FileInputStream(fileToCopy);
fileOutputStream = new FileOutputStream(targetFile);
byte[] buffer = new byte[64*1024];
int i = 0;
while((i = fileInputStream.read(buffer)) != -1) {
    fileOutputStream.write(buffer, 0, i);
}

For some users the targetFile.createNewFile results in this exception:

java.io.IOException: The filename, directory name, or volume label syntax is incorrect
    at java.io.WinNTFileSystem.createFileExclusively(Native Method)
    at java.io.File.createNewFile(File.java:850)

Filename and directory name seem to be correct. The directory targetPath is even checked for existence before the copy code is executed and the filename looks like this: AB_timestamp.xml

The user has write permissions to the targetPath and can copy the file without problems using the OS.

As I don't have access to a machine this happens on yet and can't reproduce the problem on my own machine I turn to you for hints on the reason for this exception.

解决方案

Try this, as it takes more care of adjusting directory separator characters in the path between targetPath and filename:

File targetFile = new File(targetPath, filename);

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