使用系统API获取文件路径相关的信息

Use the basename() , dirname() , basenameWithoutExtension() , and extension() methods defined in the path Pub package when working with a file path.

import 'package:path/path.dart' as path;
import 'dart:io';
main() async {
  // Create dir/ and dir/file.txt in the system temp directory.
  var file = await new File('${Directory.systemTemp.path}/dir/myFile.txt')
      .create(recursive: true);
  print(path.basename(file.path)); // Prints 'file.txt'.
  print(path.dirname(file.path)); // Prints path ending with 'dir'.
  print(path.basenameWithoutExtension(file.path)); // Prints 'myFile'.
  print(path.extension(file.path)); // Prints '.txt'.