如何locking文件以避免使用NIO软件包进行删除

我正在使用NIO文件通道来pipe理文件，并locking它们。 到目前为止，它的工作，但是当我locking文件使用NIO文件locking它locking该文件，所以文件内容不能改变。 例如，如果我尝试编辑记事本上的文本文件它会告诉我以下错误信息：

这是预期的结果，但是，如果我试图从Windows资源pipe理器中删除文件（我没有testing过其他操作系统可能也将是可能的），它会允许我，这是不受欢迎的，我想知道如果可以打开一个文件句柄

使用的代码：

private static final byte[] MessageBytes; static { byte tmp[]; try { tmp = "Hello World".getBytes("UTF-8"); } catch (UnsupportedEncodingException ex) { //if fail get the bytes in whatever the java VM charset sets as default tmp = "Hello World".getBytes(); } MessageBytes = tmp; } private static final String Filename = "Lock_test.txt"; private static void createFileandLock() { Path FilePath = Paths.get(Filename); FileChannel OpenFCh; try { OpenFCh = FileChannel.open(FilePath, StandardOpenOption.CREATE, StandardOpenOption.READ, StandardOpenOption.WRITE // ,StandardOpenOption.APPEND ); System.out.println("File Channel is Open."); } catch (IOException err) { OpenFCh = null; } if (OpenFCh != null) { FileLock Lock = null; try { Lock = OpenFCh.lock(); } catch (IOException err) { System.out.println("Unable To Lock the File."); } try { OpenFCh.write(ByteBuffer.wrap(MessageBytes)); OpenFCh.force(false); System.out.println("Message Recorded"); } catch (IOException ex) { System.out.println("Unable To write data into file"); } try { // at this point file still locked and open. //lets wait for input and meanwhile ask to delete the file. System.out.print("Please Try to delete file at: "); System.out.println(FilePath.toString()); System.out.println("Press Enter to Continue"); System.in.read(); } catch (IOException ex) { } if (Lock != null) { try { Lock.close(); } catch (IOException ex) { } } try { OpenFCh.close(); } catch (IOException ex) { } } } 

进一步研究后，我注意到，使用RandomAccessFile将locking文件，避免删除，因为它创build一个文件描述符 ，基本上打开下划线操作系统上的句柄。 所以使用RAF确实能提供理想的结果：

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使用的代码：

 private static void createRAFileandLock() { RandomAccessFile RAf; try { RAf = new RandomAccessFile(Filename, "rw"); } catch (FileNotFoundException ex) { //since is open as RW shold not trigger. RAf = null; } if (RAf != null) { FileChannel OpenFCh = RAf.getChannel(); FileLock Lock = null; try { Lock = OpenFCh.lock(); } catch (IOException err) { System.out.println("Unable To Lock the File."); } try { OpenFCh.write(ByteBuffer.wrap(MessageBytes)); OpenFCh.force(false); System.out.println("Message Recorded"); } catch (IOException ex) { System.out.println("Unable To write data into file"); } // at this point file still locked and open. //lets wait for input and meanwhile ask to delete the file. try { System.out.print("Please Try to delete file at: "); System.out.println(Filename); System.out.println("Press Enter to Continue"); System.in.read(); } catch (IOException ex) { } if (Lock != null) { try { Lock.close(); } catch (IOException ex) { } } try { OpenFCh.close(); RAf.close(); } catch (IOException ex) { } } } 

不过，我想知道是否有可能只使用NIO进行存档。 随机访问文件在IO包上。