Java7的新IO，NIO2

 1 package chapter3;
 2 
 3 import java.io.IOException;
 4 import java.nio.file.FileSystems;
 5 import java.nio.file.Paths;
 6 import java.nio.file.StandardWatchEventKinds;
 7 import java.nio.file.WatchEvent;
 8 import java.nio.file.WatchKey;
 9 import java.nio.file.WatchService;
10 import java.util.List;
11 
12 public class WatchServiceTest {
13 
14     public static void main(String[] args) throws IOException, InterruptedException {
15         WatchService ws = FileSystems.getDefault().newWatchService();
16         Paths.get("C:/").register(ws, StandardWatchEventKinds.ENTRY_CREATE);
17         while (true) {
18             WatchKey wk = ws.take();
19             List<WatchEvent<?>> weList =  wk.pollEvents();
20             for (WatchEvent<?> we : weList) {
21                 System.out.println(we.context() + " 文件发生了： " + we.kind() + "事件！");
22             }
23             boolean valid = wk.reset();
24             if (!valid) {
25                 break;
26             }
27         }
28     }
29 
30 }