csv - Dart:如何将 CSV 数据映射到模型列表？

Question

比方说，在文件 中裁剪.csv ，我有一个简单的数据集，格式如下:

id,cropType,cropName
1,food,rice
2,cash,sugarcane
3,horticulture,orange

我有一个名为 的模型类粮食裁剪 :

class foodCrops {
  int id;
  String cropType;
  String cropName;

  foodCrops(this.id, this.cropType, this.cropName);
}

如何将这些数据从 csv 文件转换为 类食品裁剪一览 ?

List<foodCrops> 

Answer 1

在这里，我只是解析这些行以制作 FoodCrop 的实例类(class)。您可以根据需要解析数据。

void main() {
  var foodCrops = makeFoodCropList();
  for (var foodCrop in foodCrops) {
    print(foodCrop);
  }
}

List<FoodCrop> makeFoodCropList() {
  var lines = [
    'id,cropType,cropName',
    '1,food,rice',
    '2,cash,sugarcane',
    '3,horticulture,orange',
  ];
  lines.removeAt(0); //remove column heading

  /*
  * you can use any parser for csv file,
  *
  * a csv package is available
  * or simple file reading will also get the job done main logic is coded here
  * */

  var list = <FoodCrop>[];
  for (var line in lines) list.add(FoodCrop.fromList(line.split(',')));

  return list;
}

class FoodCrop {
  int id;
  String cropType;
  String cropName;

  FoodCrop(this.id, this.cropType, this.cropName);

  FoodCrop.fromList(List<String> items) : this(int.parse(items[0]), items[1], items[2]);

  @override
  String toString() {
    return 'FoodCrop{id: $id, cropType: $cropType, cropName: $cropName}';
  }
}