如何从 Flutter 中的 docx 文件中读取数据

Question

我有一个本地资产、一个 Docx 文件（或者在某些情况下只有 UInt8List 字节），如何从该文件（或字节）中读取数据？

这个数据只包含字符串，我怎么读？ 我可以读取.txt 文件，但没有docx，为什么？ 实际上里面没有特殊字符，所以问题不在于编码。 （查看下面的内容，HtmlCode）

我试过：这是字节

final data = await rootBundle.load('template.docx');
    final bytes = data.buffer.asUint8List();

这是（将是）字符串

String fileText = await rootBundle.loadString('template.docx');

错误：

Error: FormatException: Unexpected extension byte (at offset 16)
    at Object.throw_ [as throw] (http://localhost:54436/dart_sdk.js:5366:11)
    at convert._Utf8Decoder.new.convertGeneral (http://localhost:54436/dart_sdk.js:49632:19)
    at convert._Utf8Decoder.new.convertSingle (http://localhost:54436/dart_sdk.js:49604:19)
    at Utf8Decoder.convert (http://localhost:54436/dart_sdk.js:49463:67)
    at Utf8Codec.decode (http://localhost:54436/dart_sdk.js:49172:22)
    at asset_bundle.PlatformAssetBundle.new.loadString (http://localhost:54436/packages/flutter/src/services/system_channels.dart.lib.js:2289:31)
    at loadString.next (<anonymous>)
    at http://localhost:54436/dart_sdk.js:39272:33
    at _RootZone.runUnary (http://localhost:54436/dart_sdk.js:39129:58)
    at _FutureListener.thenAwait.handleValue (http://localhost:54436/dart_sdk.js:34091:29)
    at handleValueCallback (http://localhost:54436/dart_sdk.js:34651:49)
    at Function._propagateToListeners (http://localhost:54436/dart_sdk.js:34689:17)
    at _Future.new.[_completeWithValue] (http://localhost:54436/dart_sdk.js:34531:23)
    at async._AsyncCallbackEntry.new.callback (http://localhost:54436/dart_sdk.js:34554:35)
    at Object._microtaskLoop (http://localhost:54436/dart_sdk.js:39416:13)
    at _startMicrotaskLoop (http://localhost:54436/dart_sdk.js:39422:13)
    at http://localhost:54436/dart_sdk.js:34905:9

字节完全没有问题，但是字符串会抛出这个错误。 我怎么能解决这个问题？

完整代码：

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Html(),
    );
  }
}

class Html extends StatefulWidget {
  LoadHtml createState() => LoadHtml();
}

class LoadHtml extends State<Html> {

  void initState() {
    readFilesFromAssets();
    super.initState();
  }

// Read .docx function not only .docx mostly any type .json .txt etc
  readFilesFromAssets() async {
    print("read now");
    String assetContent = await rootBundle.loadString('assets/template.docx');
    print("assetContent : $assetContent");
  }

//this is exaclty what would be in the template.doc
  var HtmlCode = r"""
<HTML>
<BODY LANG="ru-RU" DIR="LTR">
<P CLASS="western" ALIGN=CENTER STYLE="margin-bottom: 0in"><FONT FACE="Times New Roman, serif"><FONT SIZE=3><SPAN LANG="en-US">Example
Document</SPAN></FONT></FONT></P>
<P CLASS="western" ALIGN=CENTER STYLE="margin-bottom: 0in"> <FONT FACE="Times New Roman, serif"><FONT SIZE=5><SPAN LANG="en-US"><B>Document
name</B></SPAN></FONT></FONT></P>
<P LANG="en-US" CLASS="western" ALIGN=CENTER STYLE="margin-bottom: 0in">
<BR>
</P>
<P CLASS="western" ALIGN=CENTER STYLE="margin-bottom: 0in"><FONT FACE="Times New Roman, serif"><FONT SIZE=3><SPAN LANG="en-US">Szerzodes
tobbi resze:</SPAN></FONT></FONT></P>
</BODY>
</HTML>
    """;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text('From docx')),
      body: WebViewX(
        initialContent: HtmlCode, //I should read this from the .docx
        initialSourceType: SourceType.HTML,
      ),
    );
  }
}

Answer 1

首先将您的.docx文件添加到assets文件夹中，与lib文件夹处于同一级别。

然后像这样将您的assets文件夹添加到pubspec.yaml

  assets:
    - assets/

在你的main.dart之后添加这个 function 即readFileFromAssets()在initState()到它会在应用程序启动时开始从.docx加载数据。

并导入这个 package 太import 'package:flutter/services.dart';

void initState() {
  readFilesFromAssets();
  super.initState();
}

// Read .docx function not only .docx mostly any type .json .txt etc
readFilesFromAssets() async {
  String assetContent = await rootBundle.loadString('assets/mytext.docx');
  print("assetContent : $assetContent");
}

这是 output：

如何从 Flutter 中的 docx 文件中读取数据

问题描述

1 个解决方案

解决方案1
1 2021-05-25 07:58:34

如何从 Flutter 中的 docx 文件中读取数据

问题描述

1 个解决方案

解决方案1 1 2021-05-25 07:58:34

解决方案1
1 2021-05-25 07:58:34