使用apache common-io 监控文件变化

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
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*/
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..");
}
}