String chapterName;

bool collect;

int courseId;

String desc;

String descMd;

String envelopePic;

bool fresh;

String host;

int id;

String link;

String niceDate;

String niceShareDate;

String origin;

String prefix;

String projectLink;

int publishTime;

int realSuperChapterId;

int selfVisible;

int shareDate;

String shareUser;

int superChapterId;

String superChapterName;

List tags;

String title;

int type;

int userId;

int visible;

int zan;

Person(

this.apkLink,

this.audit,

this.author,

this.canEdit,

this.chapterId,

this.chapterName,

this.collect,

this.courseId,

this.desc,

this.descMd,

this.envelopePic,

this.fresh,

this.host,

this.id,

this.link,

this.niceDate,

this.niceShareDate,

this.origin,

this.prefix,

this.projectLink,

this.publishTime,

this.realSuperChapterId,

this.selfVisible,

this.shareDate,

this.shareUser,

this.superChapterId,

this.superChapterName,

this.tags,

this.title,

this.type,

this.userId,

this.visible,

this.zan);

factory Person.fromJson(Map<String, dynamic> json) => _$PersonFromJson(json);

Map<String, dynamic> toJson() => _$PersonToJson(this);

}

@JsonSerializable()

class Tag {

String name;

String url;

Tag(this.name, this.url);

factory Tag.fromJson(Map<String, dynamic> json) => _$TagFromJson(json);

Map<String, dynamic> toJson() => _$TagToJson(this);

}

注意：

• 添加part 'Article.g.dart';其中：Article是dart文件名，文件名+g.dart格式

• 在每个需要序列化的类前面添加@JsonSerializable()，如类：Article，ArticleData，Person，Tag

• 每个类里面有：变量，构造函数，`类名.fromJso

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n() => _KaTeX parse error: Expected group after '_' at position 32: …`，`toJson() => _̲类名ToJson(this)`

3.3 生成序列化类.g.dart文件

执行如下指令

flutter pub run build_runner build

如无错误发生，生成Article.g.dart文件，Article.dart文件中_$类名FromJson(json)等不会再出现错误

四 序列化后类的应用

---

4.1 代码

late Future

futureArticle;

@override

void initState() {

super.initState();

futureArticle=_httpGet2();

}

Future

_httpGet2() async {

var httpClient = new HttpClient();

var uri = Uri(

scheme: ‘https’,

host: ‘www.wanandroid.com’,

path: ‘article/list/0/json’,

);

HttpClientRequest request = await httpClient.getUrl(uri);

HttpClientResponse response = await request.close();

String responseBody = await response.transform(utf8.decoder).join();

var jsonDecode = json.decode(responseBody);

var article =Article.fromJson(jsonDecode);

print(article);

return article;

}

//显示

FutureBuilder

(

future: futureArticle,

builder: (context, snapshot) {

if (snapshot.hasData) {

return ListView.separated(

itemCount: snapshot.data!.data.datas.length,

separatorBuilder: (context, index) {return Divider(height: 10, color: Colors.grey,);},

itemBuilder: (BuildContext context, int index) {

return Column(

children: [