JNotify的监测文件变化的简单测试例子

Posted 2020-11-01 宋兴柱-Sindrol

一、理由

使用JNotify监测的更全面，更快速。

二、参考代码

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

public class Main implements JNotifyListener {
    public static void main(String[] args) throws JNotifyException, InterruptedException {
        // path to watch
        String path = "/weatherdata";
        System.out.println(System.getProperty("java.library.path"));

        // watch mask, specify events you care about,
        // or JNotify.FILE_ANY for all events.
        int mask = JNotify.FILE_CREATED
                | JNotify.FILE_DELETED
                | JNotify.FILE_MODIFIED
                | JNotify.FILE_RENAMED;


        // watch subtree?
        boolean watchSubtree = true;


        // add actual watch
        int watchID = JNotify.addWatch(path, mask, watchSubtree, new Main());


        // sleep a little, the application will exit if you
        // don\'t (watching is asynchronous), depending on your
        // application, this may not be required
        Thread.sleep(1000000);


        // to remove watch the watch
        boolean res = JNotify.removeWatch(watchID);
    }

    int count = 0;

    @Override
    public void fileCreated(int i, String s, String s1) {
        System.out.println("fileCreated s=" + i + " i=" + s + " s1=" + s1);
    }

    @Override
    public void fileDeleted(int i, String s, String s1) {
        System.out.println("fileDeleted s=" + s + " i=" + i + " s1=" + s1);
    }

    @Override
    public void fileModified(int i, String s, String s1) {
        System.out.println("fileModified s=" + s + " i=" + i + " s1=" + s1);
    }

    @Override
    public void fileRenamed(int i, String s, String s1, String s2) {
        System.out.println("fileRenamed s=" + s + " i=" + i + " s1=" + s1 + " s2=" + s2 + " count:" + (++count));

    }
}

三、说明

如果启动时报找不到JNotify库(https://sourceforge.net/projects/jnotify/files/jnotify/jnotify-0.94/ 下载)，请复制JNotify的最新版本库到系统相应库目录下。

System.getProperty("java.library.path")

在Windows上，复制jnotify_64bit.dll到：c:/windows下即可。

在Linux上，可以复制libjnotify.so到/usr/lib64目录下。

 附件：https://files.cnblogs.com/files/songxingzhu/jnotify-lib-0.94.zip