java7文件及目录变更监控

之前想过对一些文件操作最好能够监控，从而通过文件变更监控来解决系统耦合，比如某公司就是通过监控binlog变化来同步数据库，从java7开始提供了系统级别的工具，使文件变更监控变的更简单

public class Test {

    public static void main(String[] args) {
        WatchService watcher = null;
        try {
            watcher = FileSystems.getDefault().newWatchService();
            Path dir = FileSystems.getDefault().getPath("E:\\");

            WatchKey key = dir.register(watcher, StandardWatchEventKinds.ENTRY_CREATE,
                    StandardWatchEventKinds.ENTRY_DELETE, StandardWatchEventKinds.ENTRY_MODIFY);

            while (true) {
                key = watcher.take();
                for (WatchEvent<?> event : key.pollEvents()) {
                    System.out.println(event.kind().name());
                    System.out.println(event.context());
                    System.out.println("00-------------------00");
                }
                key.reset();
            }
        } catch (IOException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }


    }
}

 上面是一个简单的例子