java监视文件任何变动

原来可以这样用java来监控文件，

 

private static void nio() throws IOException {
WatchService watcher = null;
try {
try {
watcher = FileSystems.getDefault().newWatchService();
String path = "D:\\test\\as";// 要监控的文件或者目录
Paths.get(path).register(watcher,
StandardWatchEventKinds.ENTRY_MODIFY,
StandardWatchEventKinds.ENTRY_CREATE,
StandardWatchEventKinds.ENTRY_DELETE);
} catch (IOException e) {
e.printStackTrace();
throw e;
}
} catch (Exception e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}

while (true) {
WatchKey key = null;
try {
key = watcher.take();
} catch (InterruptedException e) {
continue;
}
for (WatchEvent<?> event : key.pollEvents()) {

WatchEvent.Kind<?> kind = event.kind();

if (kind == StandardWatchEventKinds.OVERFLOW) {
continue;
}
if (kind == StandardWatchEventKinds.ENTRY_MODIFY
|| kind == StandardWatchEventKinds.ENTRY_CREATE
|| kind == StandardWatchEventKinds.ENTRY_DELETE) {
System.out.println("AAAAAAAASSS");// 处理特定事件！
break;
}
}
key.reset();

}
}