使用apache common-io 监控文件变化--转

package common.io;





import org.apache.commons.io.filefilter.FileFilterUtils;

import org.apache.commons.io.monitor.FileAlterationListener;

import org.apache.commons.io.monitor.FileAlterationMonitor;

import org.apache.commons.io.monitor.FileAlterationObserver;





import java.io.File;

import java.util.concurrent.TimeUnit;





/**

 * Created with IntelliJ IDEA.

 * User: superman

 * Date: 14-1-5

 * Time: 上午11:43

 * To change this template use File | Settings | File Templates.

 */

public class Example3 {

    public static void main(String[] args) throws Exception{

        File directory = new File("D:/test");

        // 轮询间隔 5 秒

        long interval = TimeUnit.SECONDS.toMillis(5);

        // 创建一个文件观察器用于处理文件的格式

        FileAlterationObserver observer = new FileAlterationObserver(directory, FileFilterUtils.and(

                FileFilterUtils.fileFileFilter(),FileFilterUtils.suffixFileFilter(".txt")));

        //设置文件变化监听器

        observer.addListener(new MyFileListener());

        FileAlterationMonitor monitor = new FileAlterationMonitor(interval,observer);

        monitor.start();

        //Thread.sleep(30000);

        //monitor.stop();

    }

}

final class MyFileListener implements FileAlterationListener{

    @Override

    public void onStart(FileAlterationObserver fileAlterationObserver) {

        System.out.println("monitor start scan files..");

    }





    @Override

    public void onDirectoryCreate(File file) {

        System.out.println(file.getName()+" director created.");

    }





    @Override

    public void onDirectoryChange(File file) {

        System.out.println(file.getName()+" director changed.");

    }





    @Override

    public void onDirectoryDelete(File file) {

        System.out.println(file.getName()+" director deleted.");

    }





    @Override

    public void onFileCreate(File file) {

        System.out.println(file.getName()+" created.");

    }





    @Override

    public void onFileChange(File file) {

        System.out.println(file.getName()+" changed.");

    }





    @Override

    public void onFileDelete(File file) {

        System.out.println(file.getName()+" deleted.");

    }





    @Override

    public void onStop(FileAlterationObserver fileAlterationObserver) {

        System.out.println("monitor stop scanning..");

    }

}