我试图检测文件夹中的文件创建,但是WatchService
无法检测第二个文件创建。卡在key = watcher.take()
上。知道为什么吗?我正在使用Ubuntu 11.04 x86。
private void watchWorkingDirectory() {
try {
WatchService watcher = FileSystems.getDefault().newWatchService();
WatchKey key;
key = Paths.get(tailSource, "").register(watcher, ENTRY_CREATE);
for (;;) {
System.err.println("Watching current working directory...............................................");
// wait for key to be signalled
key = watcher.take();
System.out.println("Event detected:");
for (WatchEvent<?> event : key.pollEvents()) {
WatchEvent.Kind<?> kind = event.kind();
if (kind == ENTRY_CREATE) {
tailSource = event.context().toString();
System.out.println(tailSource);
File file = new File(tailSource);
BufferedReader br = new BufferedReader(new FileReader(file));
System.out.println(br.readLine());
tailer = new Tailer(file, tListener, 1, false);
(new Thread(tailer)).start();
}
}
}
} catch (IOException | InterruptedException e) {
System.out.println(e.getMessage());
}
}
}
最佳答案
您必须在处理事件后调用key.reset()。
http://blogs.oracle.com/thejavatutorials/entry/watching_a_directory_for_changes
关于java - Java:nio WatchService-无法检测到第二个文件的创建。为什么?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/7413817/