HarmonyOS 鸿蒙Next JSON转实体类

发布于 1周前 作者 phonegap100 来自 鸿蒙OS

HarmonyOS 鸿蒙Next JSON转实体类

HarmonyOS JSON转实体类？

Harmonyos Next教程
2 回复

请参考：

@Observed class ArticleRes {
  code: number = -1
  data: Array<Article> = [] }
@Observed class Article {
   id: string; 
   title: string; 
   brief: string;
   isLiked: boolean; 
   likesCount: number;
  constructor(id: string, title: string, brief: string, isLiked: boolean, likesCount: number) {
    this.id = id;
    this.title = title;
    this.brief = brief; 
    this.isLiked = isLiked; 
    this.likesCount = likesCount;
  }
}
res = `{""code"":0,""data"":[
  {""id"":""001"",""title"":""第0篇文章"",""brief"":""文章简介内容"",""isLiked"":false,""likesCount"":100},
  {""id"":""002"",""title"":""第1篇文章"",""brief"":""文章简介内容"",""isLiked"":false,""likesCount"":100},
  {""id"":""003"",""title"":""第2篇文章"",""brief"":""文章简介内容"",""isLiked"":false,""likesCount"":100},
  {""id"":""004"",""title"":""第4篇文章"",""brief"":""文章简介内容"",""isLiked"":false,""likesCount"":100},
  {""id"":""005"",""title"":""第5篇文章"",""brief"":""文章简介内容"",""isLiked"":false,""likesCount"":100},
  {""id"":""006"",""title"":""第6篇文章"",""brief"":""文章简介内容"",""isLiked"":false,""likesCount"":100}
  ]
  }`;

let articleRes: ArticleRes = JSON.parse(this.res)

在HarmonyOS鸿蒙系统中，将JSON字符串转换为实体类（对象）是常见的数据处理需求。这一操作通常依赖于反射机制和适当的库来完成。以下是一个简要说明和示例代码：

HarmonyOS原生并不直接提供类似Gson或Jackson这样的第三方库进行JSON与实体类的转换，但你可以通过集成这些库来实现。以下以Gson为例：

  1. 添加依赖：首先，你需要在项目的build.gradle文件中添加Gson库的依赖。

    implementation 'com.google.code.gson:gson:2.8.8'

  2. 创建实体类：定义一个与JSON结构对应的Java类。

  3. 转换JSON：使用Gson的fromJson方法将JSON字符串转换为实体类对象。

    Gson gson = new Gson();
MyClass myObject = gson.fromJson(jsonString, MyClass.class);

请确保JSON字符串的格式与实体类的字段匹配，包括字段名和类型。此外，如果JSON中有嵌套对象或数组，你的实体类也应相应地包含嵌套类或集合类型的字段。

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