【发布时间】：2021-05-16 08:02:45
【问题描述】：
我在使用 application/json 内容类型在表单数据中传递 requestDTO 对象时遇到问题。
我在下面的代码中使用了 Dio 库。但是在 Dio 参数中，值作为字符串传递。我从服务器收到了缺少 requestDTO 对象的错误。
Map<String, String> header = Map<String, String>();
header['Authorization'] = 'Bearer eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiI4NzY1NDMyMTA5IiwiYXV0aCI6IlJPTEVfQ09OVFJBQ1RPUiIsImV4cCI6MTYxNTYzNjIxMX0._pBVg6aWSl2K2bf416w1YnxYpQeEckL1Go9b_TRgaVruwcyh7tB5OdY9ujSiORn3rVpE39kPIX5zTTuwSJC3lQ';
header['content-type'] = 'multipart/form-data';
Map<String, dynamic> params = Map<String, dynamic>();
params['requestDTO'] = '{\n "email": "c1@yopmail.com",\n "firstName": "Contractor",\n "fullName": "Contractor",\n "imageUrl": "string",\n "lastName": "two",\n "phoneNumber": "8765432109",\n "prAddressDTO": {\n "addressLine": "string",\n "city": "string",\n "country": "string",\n "id": 7009,\n "latitude": 0,\n "longitude": 0,\n "prUserId": 6104,\n "state": "string",\n "zipcode": "string"\n },\n "prBusinessInfoDTO": {\n "businessLicense": "string",\n "businessName": "string",\n "experience": 0,\n "id": 6251,\n "liabilityInsurance": "string",\n "noOfWorkers": 0,\n "notes": "string",\n "prUserId": 6104,\n "projectsCompleted": 0,\n "servicesCategory": "string",\n "servicesSubCategory": "string",\n "stateRegistration": "string",\n "taxIdentificationNumber": "string"\n },\n "userType": "CONTRACTOR"\n}';
// Create form data Request
FormData formData = new FormData.fromMap(params);
final option = Options(headers: header);
try {
final response = await this.dio.put('http://180.211.99.164:9091/api/contractor/me', data: formData, options: option, onSendProgress: (sent, total) => Logger().v("uploadFile ${sent / total}"));
this._handleNetworkSuccess(response: response);
} on DioError catch (error) {
this._handleDioNetworkError(error: error);
}
【问题讨论】：