尝试写入文件夹时出现“java.nio.file.AccessDeniedException”
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Getting "java.nio.file.AccessDeniedException" when trying to write to a folder
提问by OneTwo
For some reason I keep getting java.nio.file.AccessDeniedExceptionevery time I try to write to a folder on my computer using a java webapp on Tomcat. This folder has permissions set to full control for everyone on my computer (Windows). Does anybody know why I get this exception?
出于某种原因，java.nio.file.AccessDeniedException每次我尝试使用 Tomcat 上的 java webapp 写入我计算机上的文件夹时，我都会收到。此文件夹的权限设置为对我计算机 (Windows) 上的所有人进行完全控制。有人知道为什么我会收到此异常吗？
Here's my code:
这是我的代码：
public void saveDocument(String name, String siteID, byte doc[]) {
try {
Path path = Paths.get(rootDirectory + siteID);
if (Files.exists(path)) {
System.out.println("Exists: " + path.toString());
Files.write(path, doc);
} else {
System.out.println("DOesn't exist");
throw new Exception("Directory for Site with ID " + siteID + "doesn't exist");
}
} catch (FileSystemException e) {
System.out.println("Exception: " + e);
e.printStackTrace();
} catch (IOException e ) {
System.out.println("Exception: " + e);
e.printStackTrace();
} catch (Exception e) {
System.out.println("Exception: " + e);
e.printStackTrace();
}
And here is the error:
这是错误：
Exception: java.nio.file.AccessDeniedException: C:\safesite_documents\site1 java.nio.file.AccessDeniedException: C:\safesite_documents\site1 at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:83) at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97) at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:102) at sun.nio.fs.WindowsFileSystemProvider.newByteChannel(WindowsFileSystemProvider.java:230) at java.nio.file.spi.FileSystemProvider.newOutputStream(FileSystemProvider.java:430) at java.nio.file.Files.newOutputStream(Files.java:172) at java.nio.file.Files.write(Files.java:3092)
异常：java.nio.file.AccessDeniedException: C:\safesite_documents\site1 java.nio.file.AccessDeniedException: C:\safesite_documents\site1 at sun.nio.fs.WindowsException.translateToIOException(WindowsException.java:83) at sun。 nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:97) at sun.nio.fs.WindowsException.rethrowAsIOException(WindowsException.java:102) at sun.nio.fs.WindowsFileSystemProvider.newByteChannel(WindowsFileSystemProvider.java:230) at java .nio.file.spi.FileSystemProvider.newOutputStream(FileSystemProvider.java:430) at java.nio.file.Files.newOutputStream(Files.java:172) at java.nio.file.Files.write(Files.java:3092) )
Possible reason why: See my post on supersuser about how I can't uncheck 'Read Only' for any of my folders on windows 7. Even though all the folders aren't read only to anything but java.
可能的原因：请参阅我在 supersuser 上的帖子，了解我如何无法取消选中 Windows 7 上任何文件夹的“只读”。即使所有文件夹都不是只读的，但 Java 除外。
采纳答案by OneTwo
Ok it turns out I was doing something stupid. I hadn't appended the new file name to the path.
好吧，事实证明我在做一些愚蠢的事情。我没有将新文件名附加到路径中。
I had
我有
rootDirectory = "C:\safesite_documents"
but it should have been
但它应该是
rootDirectory = "C:\safesite_documents\newFile.jpg"
Sorry it was a stupid mistake as always.
抱歉，这是一个愚蠢的错误。
回答by ekene
I was getting the same error when trying to copy a file. Closing a channel associated with the target file solved the problem.
尝试复制文件时遇到相同的错误。关闭与目标文件关联的通道解决了这个问题。
Path destFile = Paths.get("dest file");
SeekableByteChannel destFileChannel = Files.newByteChannel(destFile);
//...
destFileChannel.close(); //removing this will throw java.nio.file.AccessDeniedException:
Files.copy(Paths.get("source file"), destFile);
回答by thiagola92
Not the answer for this question
不是这个问题的答案
I got this exception when trying to delete a folder where i deleted the file inside.
尝试删除我删除了其中文件的文件夹时出现此异常。
Example:
例子：
createFolder("folder");
createFile("folder/file");
deleteFile("folder/file");
deleteFolder("folder"); // error here
While deleteFile("folder/file");returned that it was deleted, the folder will only be considered empty after the program restart.
虽然deleteFile("folder/file");返回它已被删除，但只有在程序重新启动后，该文件夹才会被视为空。
On some operating systems it may not be possible to remove a file when it is open and in use by this Java virtual machine or other programs.
在某些操作系统上，当此 Java 虚拟机或其他程序打开并正在使用文件时，可能无法删除该文件。
https://docs.oracle.com/javase/8/docs/api/java/nio/file/Files.html#delete-java.nio.file.Path-
https://docs.oracle.com/javase/8/docs/api/java/nio/file/Files.html#delete-java.nio.file.Path-
回答by vinod
Delete .android folder cache files, Also delete the build folder manually from a directory and open android studio and run again.
删除 .android 文件夹缓存文件，同时从目录中手动删除 build 文件夹并打开 android studio 并再次运行。
