JSONUtil, JSON tool class

#harmony #harmonyos #arkts

Introduction and description of harmony-utils

harmony-utils A HarmonyOS tool library with rich features and extremely easy to use, with the help of many practical tools, is committed to helping developers quickly build Hongmeng applications. Its encapsulated tools cover APP, device, screen, authorization, notification, inter-thread communication, pop-up frames, toast, biometric authentication, user preferences, taking photos, albums, scanning codes, files, logs, exception capture, characters, strings, numbers, collections, dates, random, base64, encryption, decryption, JSON and other functions, which can meet various development needs.

picker_utils It is a sub-store split by harmony-utils, including PickerUtil, PhotoHelper, and ScanUtil.

Download and install

ohpm i @pura/harmony-utils

ohpm i @pura/picker_utils

  //Global initialization method, initialized in the onCreate method of UIAbility AppUtil.init()
  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
    AppUtil.init(this.context);
  }

API methods and usage

jsonToBean JSON string to object

let objStr: string = '{"id":"No_1060701","name":"张三","age":20,"addr":"乌市天山区","work":"工程师","salary":9223372036854775807.2512,"user":{"id":"No_1060701","name":"张三","age":20,"addr":"乌市天山区","work":"工程师"}}';
let user = JSONUtil.jsonToBean(objStr, User);

beanToJsonStr object to JSON string

let user: User = new User();
let str = JSONUtil.beanToJsonStr(user);

jsonToArray JSON string to Array

let arrayStr = ResUtil.getRawFileContentStrSync('data_utils.json');
let array = JSONUtil.jsonToArray<DescribeBean>(this.arrayStr);
array.forEach((item, index) => {
  LogUtil.error(`${index} - ${JSON.stringify(item)}`);
});

jsonToMap JSON string to Map

let mapStr: string = '{"id":"NO_10000011","name":"王五五","age":"30","addr":"乌市天山区","work":"攻城狮","salary":9223372036854775807.2512}';
let map = JSONUtil.jsonToMap(mapStr);
map.forEach((value, key) => {
  LogUtil.error(`${key} - ${value}`);
});

mapToJsonStr Map to JSON string

let mapStr: string = '{"id":"NO_10000011","name":"王五五","age":"30","addr":"乌市天山区","work":"攻城狮","salary":9223372036854775807.2512}';
let map = JSONUtil.jsonToMap(mapStr);

isJSONStr determines whether it is in string format json

let objStr: string = '{"id":"No_1060701","name":"张三","age":20,"addr":"乌市天山区","work":"工程师","salary":9223372036854775807.2512,"user":{"id":"No_1060701","name":"张三","age":20,"addr":"乌市天山区","work":"工程师"}}';
let b1 = JSONUtil.isJSONStr(objStr);
let b2 = JSONUtil.isJSONStr("abcd1234");

Full Code Example

import { router } from '@kit.ArkUI';
import { MockSetup } from '@ohos/hamock';
import { JSONUtil, LogUtil, ResUtil, ToastUtil } from '@pura/harmony-utils';
import { TitleBarView } from '../../component/TitleBarView';
import { DescribeBean } from '../../model/DescribeBean';
import { User } from '../../model/User';


/**
 * JSON工具类
 */
@Entry
@Component
struct Index {
  private scroller: Scroller = new Scroller();
  @State describe: DescribeBean = router.getParams() as DescribeBean;
  private readonly objStr: string = '{"id":"No_1060701","name":"张三","age":20,"addr":"乌市天山区","work":"工程师","salary":9223372036854775807.2512,"user":{"id":"No_1060701","name":"张三","age":20,"addr":"乌市天山区","work":"工程师"}}';
  private readonly mapStr: string = '{"id":"NO_10000011","name":"王五五","age":"30","addr":"乌市天山区","work":"攻城狮","salary":9223372036854775807.2512}';
  @State arrayStr: string = '';

  @MockSetup
  mock() {
    this.describe = new DescribeBean("JSONUtil", "JSON工具类");
  }

  aboutToAppear(): void {
    ResUtil.getRawFileContentStr('data_utils.json').then((result) => {
      this.arrayStr = result;
    })
  }

  onBackPress(): boolean {
    return false;
  }

  build() {
    Column() {
      TitleBarView({ describe: this.describe })
      Divider()
      Scroll(this.scroller) {
        Column() {
          Button("jsonToBean()")
            .btnStyle()
            .onClick(() => {
              let user = JSONUtil.jsonToBean(this.objStr, User);
              LogUtil.error(`${user instanceof User}`);
              LogUtil.error(`${user?.name} - ${user?.age} - ${user?.addr} - ${user?.work} - ${user?.salary} - ${user?.id}`)
              user?.say("麻辣豆腐！");
              ToastUtil.showToast("请查看Log日志");
            })
          Button("beanToJsonStr()")
            .btnStyle()
            .onClick(() => {
              let user: User = new User();
              let str = JSONUtil.beanToJsonStr(user);
              LogUtil.error(`JSON字符串： ${str}`)
              ToastUtil.showToast("请查看Log日志")
            })
          Button("jsonToArray()")
            .btnStyle()
            .onClick(() => {
              ResUtil.getRawFileContentStrSync('data_utils.json')
              let array = JSONUtil.jsonToArray<DescribeBean>(this.arrayStr);
              array.forEach((item, index) => {
                LogUtil.error(`${index} - ${JSON.stringify(item)}`)
              })
              ToastUtil.showToast("请查看Log日志");
            })
          Button("jsonToMap()")
            .btnStyle()
            .onClick(() => {
              let map = JSONUtil.jsonToMap(this.mapStr);
              map.forEach((value, key) => {
                LogUtil.error(`${key} - ${value}`);
              })
              ToastUtil.showToast("请查看Log日志");
            })
          Button("mapToJsonStr()")
            .btnStyle()
            .onClick(() => {
              let map = JSONUtil.jsonToMap(this.mapStr);
              let JsonStr = JSONUtil.mapToJsonStr(map);
              LogUtil.error("JsonStr: " + JsonStr);
              ToastUtil.showToast("请查看Log日志");
            })

          Button("isJSONStr()")
            .btnStyle()
            .onClick(() => {
              let b1 = JSONUtil.isJSONStr(this.objStr);
              let b2 = JSONUtil.isJSONStr(this.arrayStr);
              let b3 = JSONUtil.isJSONStr(this.mapStr);
              let b4 = JSONUtil.isJSONStr("abcd1234");
              LogUtil.error(`b1: ${b1}\nb2: ${b2}\nb3: ${b3}\nb4: ${b4}`)
              ToastUtil.showToast("请查看Log日志")
            })

          Blank().layoutWeight(1)
        }
        .margin({ top: 5, bottom: 5 })
      }
      .layoutWeight(1)
    }
    .width('100%')
    .height('100%')
    .justifyContent(FlexAlign.Start)
    .backgroundColor($r('app.color.main_background'))
  }
}


@Styles
function btnStyle() {
  .width('90%')
  .margin({ top: 10, bottom: 5 })
}

DEV Community