列出特定文件类型和目录的文件

 def list_files(directory, extension):

     files = []

     for file in os.listdir(directory):

         if file.endswith(extension):

             files.append(file)

     return files

 directory = '/path/to/directory'

 extension = '.txt'

 files = list_files(directory, extension)

 print(files)

 ```

 public class FileLister {

     public static void main(String[] args) {

         String directory = "/path/to/directory";

         String extension = ".txt";

         File folder = new File(directory);

         File[] files = folder.listFiles((dir, name) -> name.endsWith(extension));

         for (File file : files) {

             System.out.println(file.getName());

         }

     }

 }

 ```

 function listFiles(directory, extension) {

     const files = fs.readdirSync(directory);

     return files.filter(file => path.extname(file) === extension);

 }

 const directory = '/path/to/directory';

 const extension = '.txt';

 const files = listFiles(directory, extension);

 console.log(files);

 ```