HarmonyOS鸿蒙Next中如何将沙箱内文件排序展示

您的问题主要涉及到以下的技术点：

1、沙箱文件路径的获取。

2、文件列表获取及筛选。

3、文件修改时间的获取

4、数组排序，时间格式展示。

我写了一个简单的示例，希望对您有帮助，具体代码如下:

import fileIo from "@ohos.file.fs"

export interface FileInfo{
  filePath:string,
  time:number
}

@Entry
export struct TestFileModifyTime{

  @State docInfos:Array<FileInfo> = []

  aboutToAppear(): void {
    try{
      let filePath = this.getUIContext().getHostContext()?.filesDir+"/"+"docPath"
      console.log(`${filePath}`)
      let files = fileIo.listFileSync(filePath,{
        //列出子文件夹下的文件
        recursion:true,
        filter:{
          //由于mimeType暂不支持，采用后缀匹配的方式过滤
          suffix:[".doc",".docx"]
        }
      })
      let fileList:Array<FileInfo> = [];
      files.forEach((file,index)=>{
        //获取文件信息
        let fileStat = fileIo.statSync(filePath+file);
        let fileModifyTime = fileStat.mtime
        let fileName = file.substring(1,file.length)
        let fileInfo:FileInfo = {
          "filePath":fileName,
          "time":fileModifyTime
        }
        fileList.push(fileInfo)
      })
      //按照修改时间降序排序
      this.docInfos = fileList.sort((a,b)=>b.time-a.time)
      console.log(JSON.stringify(this.docInfos))
    }catch (error){
      let err = error as BusinessError
      console.log(`读取文件异常，错误码：${err.code},错误信息:${err.message}`)
    }
  }
  build() {

    Column(){
      Row() {
        SymbolGlyph($r("sys.symbol.arrow_left")).onClick(() => {
          this.getUIContext().getRouter().back()
        })
      }.width('100%').justifyContent(FlexAlign.Start)
      Column(){
        ForEach(this.docInfos,(docInfo:FileInfo,index)=>{
          Row(){
            Text(docInfo.filePath)
            Blank()
            Text(`修改时间:${this.formatTimestamp(docInfo.time)}`)
          }.width('100%')
        })
      }.width('100%').layoutWeight(1).padding(15)
    }.width('100%').height('100%')
  }

  formatTimestamp(timestamp: number): string {
    const date = new Date(timestamp*1000)
    const year = date.getFullYear()
    const month = String(date.getMonth() + 1).padStart(2, '0')
    const day = String(date.getDate()).padStart(2, '0')
    const hours = String(date.getHours()).padStart(2, '0')
    const minutes = String(date.getMinutes()).padStart(2, '0')
    const seconds = String(date.getSeconds()).padStart(2, '0')

    return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`
  }
}