How do I programmatically change file permissions?

by

Full control over file attributes is available in Java 7, as part of the “new” New IO facility (NIO.2). For example, POSIX permissions can be set on an existing file with setPosixFilePermissions(), or atomically at file creation with methods like createFile() or newByteChannel().

You can create a set of permissions using EnumSet.of(), but the helper method PosixFilePermissions.fromString() will uses a conventional format that will be more readable to many developers. For APIs that accept a FileAttribute, you can wrap the set of permissions with with PosixFilePermissions.asFileAttribute().

Set<PosixFilePermission> ownerWritable = PosixFilePermissions.fromString("rw-r--r--");
FileAttribute<?> permissions = PosixFilePermissions.asFileAttribute(ownerWritable);
Files.createFile(path, permissions);

In earlier versions of Java, using native code of your own, or exec-ing command-line utilities are common approaches.

More Related Contents:

  1. How do you determine the ideal buffer size when using FileInputStream?
  2. Delete directories recursively in Java
  3. Get size of folder or file
  4. Determine file creation date in Java
  5. Java in Eclipse: Where do I put files on the filesystem that I want to load using getResource? (e.g. images for an ImageIcon)
  6. Inserting text into an existing file via Java
  7. Is there a way in Java to determine if a path is valid without attempting to create a file?
  8. Best Practices to Create and Download a huge ZIP (from several BLOBs) in a WebApp
  9. WatchService for Java 6 [closed]
  10. Write I/O file to shared network drive using credentials
  11. Directory listener in Java
  12. Java : File.exists() inconsistencies when setting “user.dir”
  13. How to retrieve a list of directories QUICKLY in Java?
  14. Why cannot I return values from two functions in Java?
  15. Does Spring @Transactional attribute work on a private method?
  16. Output in a table format in Java’s System.out
  17. When will a string be garbage collected in java
  18. How do synchronized static methods work in Java and can I use it for loading Hibernate entities?
  19. [L array notation – where does it come from?
  20. In java, is it more efficient to use byte or short instead of int and float instead of double?
  21. Java: Getting a substring from a string starting after a particular character
  22. How to parse case-insensitive strings with jsr310 DateTimeFormatter?
  23. Possible to use two java classes with same name and same package?
  24. Convert an XML file to CSV file using java
  25. How to open a txt file and read numbers in Java
  26. BarCode Image Generator in Java
  27. JAX-RS Frameworks [closed]
  28. Remove duplicates from ArrayLists
  29. Conditional spring bean creation
  30. Function pointer to String method in Java

Leave a Comment