小编Fly*_*ynn的帖子

我正在尝试通过HTTP发送Json来更新数据库中的记录。我已连接到服务器，但是运行请求时出现415“不支持的媒体类型”错误。

import 'dart:async';
import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:http/http.dart' as http;

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {

@override
Widget build(BuildContext context) {
return new MaterialApp(
  home: new MyHomePage(),
);
}
}

class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => new _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
String url = 'http://<Hostname>: 
<Port>/jderest/orchestrator/JDE_ORCH_Sample_UpdateMeterReadings_Generic';


Future<String> makeRequest() async {
var response = await http
    .post(Uri.encodeFull(url), body: json.encode({
  "NewHourMeterReading": "650",
  "EquipmentNumber": "34665",
  "NewFuelMeterReading": "650"
}), headers: {"Accept": "application/json"});

print(response.body); …