删除文件夹及其下的文件

public void deleteDir(File dir){
    try (Stream<Path> walk = Files.walk(dir.toPath())) {
        walk.sorted(Comparator.reverseOrder())
                .forEach(path -> {

                        try {
                            Files.delete(path);
                        } catch (IOException ex) {
                         
                        }


                });
    }catch (Exception e){
      
    }
}