如何从Dart VM程序“读取”文件？ [英] How does one 'read' a file from a Dart VM program?

问题描述

如何从Dart程序中读取文件？

How does one 'read' a file from a Dart program ?

http://api.dartlang.org/index.html

Dart会在客户端运行，因此文件作为输入。

Dart would be running on the client-side and so taking files as input should be allowed.

推荐答案

您可以在Dart的测试框架中找到文件的使用：
status_file_parser.dart （搜索File）。

You can find a usage of files in Dart's testing framework: status_file_parser.dart (search for 'File').

简而言之：

  File file = new File(path);
  if (!file.existsSync()) <handle missing file>;
  InputStream file_stream = file.openInputStream();
  StringInputStream lines = new StringInputStream(file_stream);

  lines.lineHandler = () {
    String line;
    while ((line = lines.readLine()) != null) {
    ...
  };
  lines.closeHandler = () {
    ...
  };

请注意，API尚未完成，可能随时发生变化。

Note that the API is not yet finalized and could change at any moment.

编辑：API已更改。请参见新IO概述

API has changed. See Introduction to new IO

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