实现服务器数据同步，并实时监听文件动态代码,JS代码库,德仔网

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【JS】实现服务器数据同步，并实时监听文件动态
作者:邓诚 / 发布于2013/9/2/ 582

	package com.honest.listener;

	

	import org.apache.log4j.Logger;

	import com.honest.listener.FileUtil.PropertiesUtil;

	import net.contentobjects.jnotify.JNotify;
	import net.contentobjects.jnotify.JNotifyException;

	public class FielListener extends Thread {
	 private static Logger logger = Logger.getLogger(FielListener.class);

	 public void run() {
	 logger.info("文件监听器已启动");
	 PropertiesUtil config=FileUtil.PropertiesUtil.getInstance();
	 while (true) {
	 int mask = JNotify.FILE_CREATED | JNotify.FILE_DELETED
	 | JNotify.FILE_MODIFIED | JNotify.FILE_RENAMED;
	 //参数FILE_CREATED 创建 FILE_DELETED 删除 FILE_RENAMED 重命名 FILE_MODIFIED文件变动
	 try {
	 int watchID=JNotify.addWatch(config.getListenerPath(), mask, true,
	 new ActivityFileListener());//执行监听
	 long sleep=config.getSyncTime();
	 sleep(sleep);//默认每分钟监听一次
	 JNotify.removeWatch(watchID);
	 } catch (JNotifyException e) {
	 logger.error(e);
	 } catch (InterruptedException e) {
	 logger.error(e);
	 }
	 }
	 }

	 public static void main(String[] args) {
	 new FielListener().start();
	 }
	}
	/**
	 *
	 * @Description : 新建文件
	 * @param rootPath
	 * @param name
	 * void Created by [Aug 30, 2013] [2:14:38 PM]
	 */
	 public static void createFile(String rootPath, String name) {
	 renamedFile(rootPath,name,name);
	 }

	 /**
	 *
	 * @Description : 删除文件
	 * @param rootPath
	 * @param name
	 * void Created by [Aug 30, 2013] [2:14:54 PM]
	 */
	 public static void deleteFile(String rootPath, String name) {
	 File tempFile = getFile(rootPath, name);
	 boolean isprocess = isBeingUsed(tempFile);
	 if (isprocess) {// 文件被占用
	 deleteFile(rootPath, name);
	 } else {
	 try {
	 Runtime.getRuntime().exec("rd/s/q "+tempFile.getPath());//这样删除文件避免无法删除非空目录
	 } catch (IOException e) {
	 logger.error(e);
	 }
	 }
	 }

	 /**
	 *
	 * @Description : 文件重命名
	 * @param rootPath
	 * @param oldName
	 * @param newName
	 * void Created by [Aug 30, 2013] [2:14:57 PM]
	 */
	 public static void renamedFile(String rootPath, String oldName,
	 String newName) {
	 try {
	 String tempname = PropertiesUtil.getInstance().getListenerPath()
	 + File.separator + newName;
	 File tempFile = getFile(rootPath, oldName);
	 boolean isprocess = isBeingUsed(tempFile);
	 if (isprocess) {
	 renamedFile(rootPath, oldName, newName);
	 } else {
	 tempFile.renameTo(new File(tempname));
	 }
	 } catch (Exception e) {
	 logger.error(e);
	 }
	 }

	 /**
	 *
	 * @Description : 文件改动
	 * @param rootPath
	 * @param name
	 * void Created by [Aug 30, 2013] [2:15:02 PM]
	 */
	 public static void modifiedFile(String rootPath, String name) {
	 deleteFile(rootPath, name);
	 createFile(rootPath, name);
	 }

	 /**
	 *
	 * @Description : 文件是否被占用
	 * @param file
	 * @return boolean Created by [Aug 30, 2013] [2:23:17 PM]
	 */
	 public static boolean isBeingUsed(File file) {
	 return (file.exists() && !file.renameTo(file));
	 }

	 /**
	 *
	 * @Description : 获取同步需要同步文件的路径
	 * @param rootPath
	 * @param name
	 * @return String Created by [Aug 30, 2013] [2:37:27 PM]
	 */
	 private static File getFile(String rootPath, String name) {
	 String path = "";
	 String oldPath = rootPath + File.separator + name;
	 try {
	 String syncPath = PropertiesUtil.getInstance().getSyncPath();
	 oldPath = oldPath.replace(syncPath, "");
	 String listenerPath = PropertiesUtil.getInstance()
	 .getListenerPath();
	 path = listenerPath + oldPath;
	 } catch (Exception e) {
	 logger.error(e);
	 }
	 return new File(path);
	 }

	 public static class PropertiesUtil {
	 private static PropertiesUtil propertiesUtil = null;
	 private static final String SYNC_TIME = "syncTime";
	 private static final String SYNC_PATH = "syncPath";
	 private static final String LISTENER_PATH = "oldPath";
	 private static final long DEFAULT_TIME = 60000;
	 private PropertiesUtil(){}
	 public static PropertiesUtil getInstance() {
	 if (propertiesUtil == null)
	 propertiesUtil = new PropertiesUtil();
	 return propertiesUtil;
	 }

	 /**
	 *
	 * @Description : 加载配置文件
	 * @return Properties Created by [Aug 30, 2013] [1:52:41 PM]
	 * @throws InterruptedException
	 */
	 private Properties getSyncConfig() throws InterruptedException {
	 Properties properties = new Properties();
	 try {
	 properties.load(FileUtil.class
	 .getResourceAsStream("/synchronous.properties"));
	 } catch (IOException e) {
	 logger.error("synchronous.properties文件不存在！");
	 throw new InterruptedException();//停止监听
	 }
	 return properties;
	 }

	 /**
	 *
	 * @Description : 同步相隔时间
	 * @return long Created by [Aug 30, 2013] [1:52:56 PM]
	 * @throws InterruptedException
	 * @throws NumberFormatException
	 */
	 public long getSyncTime() throws NumberFormatException, InterruptedException {
	 return Long.valueOf(getSyncConfig().getProperty(SYNC_TIME,
	 "" + DEFAULT_TIME));
	 }

	 /**
	 *
	 * @Description : 文件同步路径
	 * @return
	 * @throws Exception
	 * String Created by [Aug 30, 2013] [2:07:51 PM]
	 */
	 public String getSyncPath() throws InterruptedException {
	 String path = getSyncConfig().getProperty(SYNC_PATH, "");
	 if (path.equals(""))
	 throw new InterruptedException("请设置同步路径！");//停止监听
	 return path;
	 }

	 /**
	 *
	 * @Description : 文件监听路径
	 * @return
	 * @throws Exception
	 * String Created by [Aug 30, 2013] [2:07:38 PM]
	 */
	 public String getListenerPath() throws InterruptedException {
	 String path = getSyncConfig().getProperty(LISTENER_PATH);
	 if (path.equals(""))
	 throw new InterruptedException("请设置监听路径！");//停止监听
	 return path;
	 }
	 }

	再次告诉大家一个秘密 java无法删除一个目录或者说非空目录 以前看很多人都去写一些复杂的代码
	迭代文件夹然后一个一个去删除文件 这一样很麻烦 现在告诉大家一个高效的办法
	可以直接使用runtime执行cmd命令中的 rd/s/q 文件目录 或文件夹 就可以删除此文件或文件夹
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