解析JSON以将一些参数转换为HEX/String

Question

我有以下问题，我是Dart新手，我正在使用Future从API的JSON响应构建列表视图，一旦我执行此请求，我收到以下响应:

请求:

Future<List<Job>> _fetchJobs() async {
final response = await http.get(
Uri.parse('http://10.10.10.254/httpapi.asp?command=wlanGetApListEx'));
if (response.statusCode == 200) {
final List jsonResponse = json.decode(response.body)['aplist'] as List;
print(jsonResponse);
return jsonResponse.map((job) => new Job.fromJson(job)).toList();
} else {
throw Exception('Failed to load jobs from API');
}
}

[
{
"ssid":444A446F626C65615F322E34,
"bssid":"80":"3f":"5d":"ed":"cd":f9,
"rssi":42,
"channel":8,
"auth":WPA2PSK,
"encry":"AES",
"extch":0
},
{
"ssid":426172696369632D322E3447,
"bssid":"b0":"76":"1b":"f4":"55":80,
"rssi":18,
"channel":1,
"auth":WPA2PSK,
"encry":"AES",
"extch":0
},
{
"ssid":46616D696C69615F65737061727A61,
"bssid":"60":"32":"b1":"71":"ce":46,
"rssi":0,
"channel":5,
"auth":WPA2PSK,
"encry":"AES",
"extch":0
},
{
"ssid":43617361204C756369616E61,
"bssid":"20":"ab":"48":"86":"17":58,
"rssi":0,
"channel":11,
"auth":WPA2PSK,
"encry":"AES",
"extch":0
}
]

你可以看到，SSID值是十六进制的，我需要它的UTF-16或UTF-8

我试图实现十六进制包，但我找不到如何在JSON数组上实现它。

Answer 1

十六进制代码在convert包中(不要与内置的dart转换库混淆)。

如果需要将字符串转换为ascii/utf8格式，请使用以下两个转换库:

import 'dart:convert';
import 'package:convert/convert.dart';
void main() {
final h = '444A446F626C65615F322E34';
final u = utf8.decode(hex.decode(h));
print(u); // prints DJDoblea_2.4
}

更麻烦的问题似乎是你提供的数据摘录不是有效的JSON，所以你当然不能用json.decode解码它。

Answer 2

尝试以下代码:

import 'dart:convert';
import 'package:convert/convert.dart';
class Job {
Job({required this.ssid, required this.auth, required this.encry});
final String ssid;
final String auth;
final String encry;
factory Job.fromJson(Map<String, dynamic> json) {
return Job(
ssid: utf8.decode(hex.decode(json['ssid'])),
auth: json['auth'],
encry: json['encry'],
);
}
Map<String, dynamic> toMap() {
return {
'ssid': ssid,
'auth': auth,
'encry': encry,
};
}
}

---

final List<Map<String, dynamic>> jsonResponse = (json.decode(response.body)['aplist'] as List).map((e) => Job.fromJson(e)).map((e) => e.toMap()).toList();