鸿蒙Harmony json转对象（1）

案例1

 运行代码如下

 上图的运行效果如下:

附加1 

1. <strong>Json_msg interface</strong>

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案例2

1. import {JSON } from '@kit.ArkTS';
2. export interface commonRes {
3.   status: number
4.   returnJSON: ESObject;
5.   time: string
6. }
7. export interface returnRes {
8.   uid: string
9.   userType: number;
10. }
12. @Entry
13. @Component
14. struct Index {
15.   @State message: string = 'Hello World';
17.   build() {
18.     RelativeContainer() {
19.       Text(this.message)
20.         .id('HelloWorld')
21.         .fontSize(50)
22.         .fontWeight(FontWeight.Bold)
23.         .onClick(async (event: ClickEvent) => {
24.           // 将该json 解析成对象
25.           let str = '{"returnJSON":{"uid":"02f17bc6b3fc465fab91d083844c7a29","userType":1,"createOn":"2024-07-12 16:38:18","thirdPartys":[],"info":{"cardNo":"AAA02342","radishQty":0},"showPage":false,"userMark":"old","isBlackNight":true,"installChannel":"Harmonyos","adChannel":"Harmonyos","showImg":"https://word.xxx.cn/tools/diary/UserDress/53c36b159ce84cf583db8f7d866cab40.png","IsDollOpen":true,"IsActivityOpen":true,"nickName":"匿名","level":1,"levelNick":"萌新","proType":0,"color":"#D2B7FF","PhotoFrameUrl":""},"status":1,"time":"2024-07-15 03:04:16"}'
26.           let str1 = '{"returnJSON":{"uid":"02f17bc6b3fc465fab91d083844c7a29","userType":1},"status":1,"time":"2024-07-15 03:04:16"}'
28.           let obj:commonRes = JSON.parse(str) as commonRes
29.           console.log("----1-time--"+obj.time)
31.           //方案一 自定义returnRes类
32.           let res:returnRes = obj.returnJSON
33.           console.log("----1-uid-"+res.uid)
35.           //方案二 不定义returnRes类
36.           let res1:ESObject = JSON.parse(JSON.stringify(obj.returnJSON))
37.           console.log("----2-uid-"+res1["uid"])
39.         })
40.         .alignRules({
41.           center: { anchor: '__container__', align: VerticalAlign.Center },
42.           middle: { anchor: '__container__', align: HorizontalAlign.Center }
43.         })
44.     }
45.     .height('100%')
46.     .width('100%')
47.   }
48. }

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案例3

1. import { DataAbilityHelper } from '@ohos.data.ability';
3. interface Person {
4.   name: string;
5.   age: number;
6.   city: string;
7. }
9. @Component
10. struct JsonToEntity {
11.   async convertJsonToEntities(jsonString: string) : Person[] {
12.     let persons: Person[] = JSON.parse(jsonString) as Person[];
13.     return persons;
14.   }
16.   build() {
17.     Column() {
18.       let jsonString = `[{"name":"徐庆","age":31,"city":"湖北"},{"name":"宇智波斑","age":80,"city":"宇智波"},{"name":"万祐宁","age":30,"city":"湖北"},{"name":"千手柱间","age":79,"city":"木叶"},{"name":"我爱罗","age":28,"city":"沙影村"},{"name":"佩恩","age":34,"city":"雨影村"}]`;
19.       let persons: Person[] = convertJsonToEntities(jsonString)
20.         console.debug(`param is ` + persons[0].name);
21.     }
22.   }
23. }

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