本地文件变更监听是很简单的功能，但由于之前写的很 low，这次实现尽量更加地面向对象罢了。对于文件的重命名会先触发 ADD 事件，然后才是 DELETE 事件！

How to use

<dependency>
    <groupId>io.github.dk900912</groupId>
    <artifactId>file-watcher</artifactId>
    <version>1.0.1</version>
</dependency>

public class FileWatcherApplication {
    public static void main(String[] args) {
        FileSystemWatcher fileWatcher = new FileSystemWatcher();
        fileWatcher.addListener(new SimpleFileChangeListener());
        File directory1 = new File("C:\\Users\\dk900912\\IdeaProjects\\test");
        File directory2 = new File("C:\\Users\\dk900912\\IdeaProjects\\tset");
        fileWatcher.addSourceDirectories(Arrays.asList(directory1, directory2));
        // 仅仅监听 txt 文本文件的变更
        fileWatcher.setFileFilter(pathname -> pathname.getName().endsWith(".txt"));
        fileWatcher.start();

        for (;;){

        }
    }
}

在上述两个目录中新增或者更新文件，然后将输出：

2022-10-25 21:36:15.122  INFO 21428 --- [   File Watcher] i.g.d.f.l.SimpleFileChangeListener       : 0=={======> C:\Users\dk900912\IdeaProjects\test\1.txt (MODIFY) <======}==0
2022-10-25 21:36:34.729  INFO 21428 --- [   File Watcher] i.g.d.f.l.SimpleFileChangeListener       : 0=={======> C:\Users\dk900912\IdeaProjects\tset\新建 Microsoft Excel 工作表.xlsx (ADD) <======}==0

建议自行实现FileChangeListener回调接口。

You are welcome to enjoy it