设置文件权限的两种方式---POSIX

Path path = Paths.get("/home/icer/note.txt");

PosixFileAttributes attr = null;

try {
attr = Files.readAttributes(path, PosixFileAttributes.class, LinkOption.NOFOLLOW_LINKS);
} catch (Exception e) {
e.printStackTrace();
}

FileAttribute<Set<PosixFilePermission>> posixAttrs = PosixFilePermissions.asFileAttribute(attr.permissions());

try {
Files.createFile(path, posixAttrs);
} catch (Exception e) {
e.printStackTrace();
}

Path path = Paths.get("/home/icer/note.txt");

try {
Set<PosixFilePermission> permissions = PosixFilePermissions.fromString("rw-r--r--");

Files.setPosixFilePermissions(path, permissions);
} catch (Exception e) {
e.printStackTrace();
}