引入依赖

      <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.11.0</version>
        </dependency>

配置监听器

@Slf4j
@Component
public class FileListener extends FileAlterationListenerAdaptor {
 
 
    /**
     * 文件创建执行
     */
    @SneakyThrows
    @Override
    public void onFileCreate(File file) {
        log.info("[新建]:" + file);
        log.info("[新建]:" + file.getPath());
        log.info("[新建]:" + file.getAbsolutePath());
    }
 
    /**
     * 文件创建修改
     */
    @Override
    public void onFileChange(File file) {
        log.info("[修改]:" + file.getAbsolutePath());
        //读取文件内容
        BufferedReader buf = null;
        try {
            buf = new BufferedReader(new InputStreamReader(new FileInputStream(file),"GBK"));
            BufferedReader br = new BufferedReader(buf);
            System.out.println(br.readLine());
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {if (buf != null){buf.close();}}catch (Exception e){}
        }
    }
 
    /**
     * 文件删除
     */
    @Override
    public void onFileDelete(File file) {
        log.info("[删除]:" + file.getAbsolutePath());
    }
 
    /**
     * 目录创建
     */
    @Override
    public void onDirectoryCreate(File directory) {
        log.info("[新建]:" + directory.getAbsolutePath());
    }
 
    /**
     * 目录修改
     */
    @Override
    public void onDirectoryChange(File directory) {
        log.info("[修改]:" + directory.getAbsolutePath());
    }
 
    /**
     * 目录删除
     */
    @Override
    public void onDirectoryDelete(File directory) {
        log.info("[删除]:" + directory.getAbsolutePath());
    }
 
    @Override
    public void onStart(FileAlterationObserver observer) {
        // TODO Auto-generated method stub
        super.onStart(observer);
    }
 
    @Override
    public void onStop(FileAlterationObserver observer) {
        // TODO Auto-generated method stub
        super.onStop(observer);
    }
}

启动监听器

@Configuration
@Slf4j
public class FilterFileConfig {
 
    @Autowired
    private FileListener fileListener;
 
    public void FileFilter(String rootDir){
        // 轮询间隔 1 秒
        long interval = TimeUnit.SECONDS.toMillis(1);
        System.out.println(interval);
        // 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(fileListener);
        //创建文件变化监听器（默认为1000毫秒执行一次扫描）
        FileAlterationMonitor monitor = new FileAlterationMonitor(interval, observer);
        // 开始监控
        try{
            monitor.start();
            System.out.println("开始监听--------");
        }
        catch (Exception e){
            log.error("异常处理",e);
        }
    }
}

启动springboot项目

@SpringBootApplication
@EnableScheduling
public class UserdemoApplication {
 
    private  static FilterFileConfig filterFileConfig;
 
    @Autowired
    public void setFilterFileConfig(FilterFileConfig filterFileConfig) {
 
        this.filterFileConfig = filterFileConfig;
    }
 
    public static void main(String[] args) {
        SpringApplication.run(UserdemoApplication.class, args);
         //监听2处文件
        filterFileConfig.FileFilter("D:\\upload");
        filterFileConfig.FileFilter("D:\\英雄时刻");
    }
 
}

成功监听