{
  ...
  "requestPermissions": [
    {
      "name": "ohos.permission.UPDATE_CONFIGURATION"
    },
    {
      "name": "ohos.permission.SET_TIME_ZONE"
    },
    {
      "name": "ohos.permission.SET_TIME"
    }
  ]
}
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import i18n from '@ohos.i18n';
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this.currentRegion = i18n.System.getDisplayCountry(i18n.System.getSystemRegion(), i18n.System.getSystemLocale());
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  this.localLanguage = i18n.System.getSystemLanguage();
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 try {
  this.countryIds = i18n.System.getSystemCountries(this.currentRegion);
  } catch (err) {
  Logger.error(`getSystemCountries failed, code is ${err.code}, message is ${err.message}`);
  }
this.countryIds.forEach(id => {
  let country = i18n.System.getDisplayCountry(id, this.localLanguage);
  this.countries.push({ key: country, value: '' });
  let isSuggested: boolean;
  try {
    isSuggested = i18n.System.isSuggested(this.localLanguage, id);
  } catch (err) {
    Logger.error(`isSuggested failed, code is ${err.code}, message is ${err.message}`);
  }
  if (isSuggested) {
    this.suggestIds.push(id);
    this.suggestCounties.push({ key: country, value: '' });
  }
})
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 getTimeZoneSrc() {
  this.timeZoneSrc = [];
  let zoneCityIDs = i18n.TimeZone.getAvailableZoneCityIDs();
  for (let zoneCityId of zoneCityIDs) {
    let cityDisplayName = i18n.TimeZone.getCityDisplayName(zoneCityId, "zh-Hans");
    let timeZone = i18n.TimeZone.getTimezoneFromCity(zoneCityId);
    this.timeZoneSrc.push({
      key: timeZone.getID(),
      timeZone: timeZone,
      display: cityDisplayName
    });
  };
}
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import systemDateTime from '@ohos.systemDateTime';
import Intl from '@ohos.intl';
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 getDateString() {
    let locale = i18n.System.getSystemLocale();
    let language = i18n.System.getSystemLanguage();
    let params = [language, locale];
    let dateFormat = new Intl.DateTimeFormat(params, options);
    let date = new Date();
    let formatString = dateFormat.format(date);
    if (language === 'zh-Hans') {
      let format = formatString.split(' ');
      return [format[0], format[1]];
    } else {
      let format = formatString.split(', ');
      return [`${format[0]}, ${format[1]}`, format[2]];
    }
  }
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getTimeZoneString(timeZone: i18n.TimeZone) {
  let offset = timeZone.getRawOffset();
  return `GMT${offset > 0 ? '+' : '-'}${this.getTimeString(offset)}  ${timeZone.getDisplayName(i18n.System.getSystemLanguage())}`;
}
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 getTimeDisplay() {
    let timeZone = await systemTime.getTimezone();
    let zone = i18n.getTimeZone(timeZone);
    this.timeZone = this.getTimeZoneString(zone);
    let timeInfo = this.getDateString();
    this.date = timeInfo[0];
    this.time = timeInfo[1];
  }
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  build() {
    Column() {
      TitleBar({ hasBackPress: true, title: $r('app.string.format_example') })
      this.TextView({ text: this.language })
      Column() {
        this.TextView({ text: this.date })
        this.TextView({ text: this.time })
        ForEach(this.numberFormat, (item, index) => {
          this.TextView({ text: item });
        }, item => item)
        this.TextView({ text: this.pluralFormat })
        this.TextView({ text: this.timeZoneDetect })
        this.TextView({ text: this.normalizer })
        this.TextView({ text: this.mDirection })
      }
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  getNumberFormatString() {
    let currentLocale = new Intl.Locale();
    let locale = i18n.System.getSystemLocale();
    let numfmt = new Intl.NumberFormat();
    let options = numfmt.resolvedOptions();
    options.locale = locale;
    options.numberingSystem = currentLocale.numberingSystem;
    options.currency = 'CNY';
    options.currencySign = 'symbol';
    options.localeMatcher = 'best fit';
    options.style = 'decimal';
    let params = [i18n.System.getSystemLanguage(), locale];
    let numberFormat = new Intl.NumberFormat(params, options);
    options.style = 'currency';
    let currencyFormat = new Intl.NumberFormat(params, options);
    options.style = 'percent';
    let percentFormat = new Intl.NumberFormat(params, options);
    // 此处返回的只是一个示例，因此1234567，123456，78.9并不具有实际意义
    return [numberFormat.format(1234567), currencyFormat.format(123456), percentFormat.format(78.9)];
  }
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// 使用 en-GB locale创建NumberFormat对象，style设置为decimal，notation设置为scientific
let numfmt = new Intl.NumberFormat("en-GB", {style:'decimal', notation:"scientific"});
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import common from '@ohos.app.ability.common';
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getPluralString(id: number, num: number) {
    let context = getContext(this) as common.UIAbilityContext;
    let plural = await context.resourceManager.getPluralStringValue(id, num);
    return pluralFormat;
  }
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const LONGITUDE = 116.20;
const LATITUDE = 39.56;
getTimeZoneDetect() {
    this.timeZoneDetect = await ResourceUtil.getString($r('app.string.coordinate').id);
    this.timeZoneDetect += '(' + LONGITUDE + ',' + LATITUDE + ') ' +
      i18n.TimeZone.getTimezonesByLocation(LONGITUDE, LATITUDE)[0].getDisplayName();
  }
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getNormalizer() {
    let nl = i18n.Normalizer.getInstance(i18n.NormalizerMode.NFC);
    this.normalizer = '\u1100 +\u1161 +\u11A8 = ' + nl.normalize('\u1100\u1161\u11A8');
  }
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  async getDirection() {
  let context = getContext(this) as common.UIAbilityContext;
  let configuration = await context.resourceManager.getConfiguration();
  if (configuration.direction === 1) { // 1代表Horizontal，0代表Vertical
    return 'Horizontal';
  } else {
    return 'Vertical';
  }
}
}
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