Dart 在处理 CSV 文件时存在问题

Question

我有以下 CSV 文件：

$ cat ../SyncedShazams.csv
"artist","title","status","date","longitude","latitude"
"Queen","Fat Bottomed Girls","N/A","2024-04-09T22:03:30.164Z","N/A","N/A"
"W&W & AXMO","Heaven Is a Place On Earth","N/A","2024-04-09T21:59:34.614Z","N/A","N/A"
"Kleks & sanah","Jestem Twoją Bajką","N/A","2024-04-07T05:07:22.333Z","N/A","N/A"
"Oskar Cyms","Nigdy wcześniej","N/A","2024-04-06T04:49:43.106Z","N/A","N/A"
"Heidi Montag","I'll Do It","N/A","2024-04-04T07:23:10.340Z","N/A","N/A"
"vowl. & Sace","2000","N/A","2024-04-04T07:22:53.608Z","N/A","N/A"
"City High","What Would You Do?","N/A","2024-04-03T20:22:52.658Z","N/A","N/A"
"City High","What Would You Do?","N/A","2024-04-03T20:22:32.131Z","N/A","N/A"
"Kleks, IGO, Kaśka Sochacka, Mrozu, Artur Rojek, Brodka, Ralph Kaminski, Bedoes 2115 & Sokół","Całkiem Nowa Bajka","N/A","2024-03-29T23:39:11.413Z","N/A","N/A"

必须按如下方式转换列：

Queen - Fat Bottomed Girls
Kleks, IGO, Kaśka Sochacka, Mrozu, Artur Rojek, Brodka, Ralph Kaminski, Bedoes 2115 & Sokół - Całkiem Nowa Bajka

但是，当前的 Dart 代码仅打印

HELLO

。

$ cat bin/shazam.dart
import 'package:shazam/shazam.dart' as shazam;
import 'dart:io';
import 'package:csv/csv.dart';

void main() async {
  try {
    final String csvData = await readFile('../SyncedShazams.csv'); 
    final List<List<dynamic>> rows = const CsvToListConverter().convert(csvData);
    print("HELLO");
  
    // Skip the header and process each row
    for (var row in rows.skip(1)) {
      if (row.length > 1) {
        // Artists and song title are expected to be in the first and second columns respectively
        print('${row[0]} - ${row[1]}');
      }
    }
  } catch (e) {
    print('Failed to process CSV: $e');
  }
}

Future<String> readFile(String filePath) async {
  final file = File(filePath);
  try {
    return await file.readAsString();
  } catch (e) {
    throw Exception('Failed to read the file: $e');
  }
}

飞镖输出：

$ dart run
Building package executable... 
Built shazam:shazam.
HELLO

我错过了什么？

Answer 1

下载 CSV 文件后，问题似乎确实是行结尾，正如 jamesdlin 指出的那样，

我使用 CRLF 行结尾 (

\r\n

)，而您的文件使用 LF 行结尾 (

\n

)。

这里有 2 种可能的解决方案。

1. 将文件转换为使用

   \r\n

   行结尾。

2. 更新代码以期望

   \n

   行结尾。 事实证明，默认情况下

   CsvToListConverter()

   需要

   \r\n

   ，但您可以传入

   eol

   命名参数，如下所示

   CsvToListConverter(eol: '\n')

   。