HarmonyOS 时间日期格式化

import dayjs from "dayjs"; 
@Entry 
@Component 
struct Index { 
  @State timeStr: number = 1714991876; 
  @State timeNow: string = '' 
  build() { 
    Row() { 
      Column() { 
        Text(`当前时间：` + this.timeNow).fontSize(20).fontWeight(FontWeight.Bold).width("100%") 
        Button("get time").onClick(() => { 
          try { 
            this.timeNow = dayjs.unix(this.timeStr).format('YYYY-MM-DD HH:mm:ss') 
          } catch (e) { 
          } 
        }) 
      }.justifyContent(FlexAlign.Center).width('100%') 
    }.height('100%') 
  } 
}