首先，确保您的ObjectBox实体类用@Entity()正确注解，并且您已经使用objectbox_generator包生成了ObjectBox文件。
现在，创建Careers对象列表，并使用putMany()方法将它们插入到数据库中

import 'package:objectbox/objectbox.dart';

// code

void main() async {
  // Initialize ObjectBox store
  var store = await openStore();

  // Get the box for the Careers entity
  final box = store.box<Careers>();

  // Create a list of Careers objects
  List<Careers> careersList = [
    Careers(
      serialNumber: 1,
      careerCode: 'C1',
      careerNewName: 'Career 1',
      careerOldName: 'Old Career 1',
    ),
    Careers(
      serialNumber: 2,
      careerCode: 'C2',
      careerNewName: 'Career 2',
      careerOldName: 'Old Career 2',
    ),
  ];

  // Use putMany() to insert the list of Careers objects
  final insertedIds = box.putMany(careersList);

  print('Inserted IDs: $insertedIds');

  // Close the store when done
  await store.close();
}

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