JAVA File Watcher Service

JAVA File Watcher Service

public   static   void  main(String[] args)  throws  IOException
    {
         try
        {
            WatchService watcher = FileSystems.getDefault().newWatchService();
            Path watchedDir = Paths.get("C:\\Users\\Administrator\\workspace\\test");
            WatchKey key = watchedDir.register(watcher, StandardWatchEventKinds.ENTRY_CREATE, StandardWatchEventKinds.ENTRY_DELETE,StandardWatchEventKinds.ENTRY_MODIFY);
            System.out.println("Watching "+ watchedDir);
        
             while ( true )
            {
                key = watcher.take(); 
                 for (WatchEvent<?> event: key.pollEvents())
                {
                    WatchEvent.Kind<?> kind = event.kind();
                    WatchEvent<Path> ev = (WatchEvent<Path>)event;
                    Path pathName = ev.context();
                     if (kind == StandardWatchEventKinds.ENTRY_MODIFY)
                        System.out.println(pathName + " modified!");
                     else   if (kind == StandardWatchEventKinds.ENTRY_DELETE)
                        System.out.println(pathName+" deleted");
                     else  {
                        System.out.println(pathName + "created");
                    }
                }
                key.reset();
            }
            
        }  catch  (InterruptedException e) {
             //  TODO 自动生成的 catch 块
            e.printStackTrace();
        }
    }

输出：

Watching C:\Users\Administrator\workspace\test

test7.txt deleted

test8.txtcreated

test8.txt modified!

newFilecreated

newFile modified!

newFile modified!

newDircreated

newDir modified!

.newFile.swpcreated

.newFile.swp modified!

.newFile.swpxcreated

.newFile.swpx modified!

.newFile.swpx deleted

.newFile.swp deleted

.newFile.swpcreated

.newFile.swp modified!

.newFile.swp modified!

.newFile.swp modified!

newFile~created

newFile~ modified!

newFile~ modified!

newFile~ modified!

newFile~ modified!

newFile~ modified!

newFile modified!

newFile modified!

newFile~ deleted

.newFile.swp modified!

.newFile.swp deleted

newDir deleted

newFile deleted

test8.txt deleted

新建文件夹 deleted