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json - 发布一个列表并使用 Dart 对其进行迭代

我正在尝试将一些数据从一个dart项目发布到另一个项目并将它们存储在mongoDB中邮政编码:import'dart:io';voidmain(){Listexample=[{"source":"today","target":"tomorrow"},{"source":"yesterday","target":"tomorrow"},{"source":"today","target":"yesterday"}];newHttpClient().post('localhost',4040,'').then((HttpClientRequestrequest){request.head