spring boot +commons-io实现文件监控

1、pom文件

    4.0.0

    cn.sun
    cui-monitor
    1.0-SNAPSHOT

    
        org.springframework.boot
        spring-boot-starter-parent
        1.2.7.RELEASE
    
    
        
            org.springframework.boot
            spring-boot-starter-web
        
        
            commons-io
            commons-io
            2.6
        
        
            log4j
            log4j
            1.2.16
        
    

2、FileListener 

package cn.sunline.Listener;

import org.apache.commons.io.monitor.FileAlterationListenerAdaptor;
import org.apache.commons.io.monitor.FileAlterationObserver;
import org.apache.log4j.Logger;

import java.io.*;

/**
 * Created by Rick on 2017/12/18.
 *
 * 文件变化监听器
 *
 * 在Apache的Commons-IO中有关于文件的监控功能的代码. 文件监控的原理如下：
 * 由文件监控类FileAlterationMonitor中的线程不停的扫描文件观察器FileAlterationObserver，
 * 如果有文件的变化，则根据相关的文件比较器，判断文件时新增，还是删除，还是更改。（默认为1000毫秒执行一次扫描）
 *
 *
 */
public class FileListener extends FileAlterationListenerAdaptor {
    private Logger log = Logger.getLogger(FileListener.class);
    /**
     * 文件创建执行
     */
    public void onFileCreate(File file) {
        log.info("[新建]:" + file.getAbsolutePath());
    }

    /**
     * 文件创建修改
     */
    public void onFileChange(File file) {
        log.info("[修改]:" + file.getAbsolutePath());
        BufferedReader buf = null;
        try {
            buf = new BufferedReader(new InputStreamReader(new FileInputStream(file),"GBK"));
            BufferedReader br = new BufferedReader(buf);
            String line = null;
            System.out.println(br.readLine());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            // 这里释放系统 IO 资源
            try {if (buf != null){buf.close();}}catch (Exception e){}
        }
    }

    /**
     * 文件删除
     */
    public void onFileDelete(File file) {
        log.info("[删除]:" + file.getAbsolutePath());
    }

    /**
     * 目录创建
     */
    public void onDirectoryCreate(File directory) {
        log.info("[新建]:" + directory.getAbsolutePath());
    }

    /**
     * 目录修改
     */
    public void onDirectoryChange(File directory) {
        log.info("[修改]:" + directory.getAbsolutePath());
    }

    /**
     * 目录删除
     */
    public void onDirectoryDelete(File directory) {
        log.info("[删除]:" + directory.getAbsolutePath());
    }

    public void onStart(FileAlterationObserver observer) {
        // TODO Auto-generated method stub
        super.onStart(observer);
    }

    public void onStop(FileAlterationObserver observer) {
        // TODO Auto-generated method stub
        super.onStop(observer);
    }
}

3、启动类

package cn.sunline;

import cn.sunline.Listener.FileListener;
import cn.sunline.controller.SampleController;
import org.apache.commons.io.filefilter.FileFilterUtils;
import org.apache.commons.io.filefilter.HiddenFileFilter;
import org.apache.commons.io.filefilter.IOFileFilter;
import org.apache.commons.io.monitor.FileAlterationListenerAdaptor;
import org.apache.commons.io.monitor.FileAlterationMonitor;
import org.apache.commons.io.monitor.FileAlterationObserver;
import org.apache.log4j.Logger;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.io.*;
import java.util.concurrent.TimeUnit;

/**
 * Created by Rick on 2017/12/18. 自定义监控器
 */
@EnableAutoConfiguration
public class AppServer
{
    final  static Logger logger = Logger.getLogger(AppServer.class);
    public static void main(String[] args) throws Exception {
        SpringApplication.run(AppServer.class, args);
        System.out.println("*********************************启动成功*********************************");
        // 监控目录
        String rootDir = "D:\\test";
        // 轮询间隔 5 秒
        long interval = TimeUnit.SECONDS.toMillis(1);
        // 创建过滤器
        IOFileFilter directories = FileFilterUtils.and(
                FileFilterUtils.directoryFileFilter(),
                HiddenFileFilter.VISIBLE);
        IOFileFilter files       = FileFilterUtils.and(
                FileFilterUtils.fileFileFilter(),
                FileFilterUtils.suffixFileFilter(".txt"));
        IOFileFilter filter = FileFilterUtils.or(directories, files);
        // 使用过滤器
        FileAlterationObserver observer = new FileAlterationObserver(new File(rootDir), filter);
        
        //FileAlterationObserver observer = new FileAlterationObserver(new File(rootDir));
        observer.addListener(new FileListener());
        //创建文件变化监听器
        FileAlterationMonitor monitor = new FileAlterationMonitor(interval, observer);
        // 开始监控
        try{
            monitor.start();
            System.out.println("***************监控中***************");
        }
        catch (Exception e){
            logger.error("异常处理",e);
        }
    }
}

4、运行效果