HarmonyOS App数据缓存如何清除，或者App数据缓存文件目录是什么

import fs from '@kit.CoreFileKit'; 
let cacheDir = context.cacheDir; 
@Entry 
@Component 
struct Clear_cache { 
  clearCache() { 
    fs.listFile(cacheDir).then((filenames) => { 
      for (let i = 0;i < filenames.length; i++) { 
        // let dirPath = cacheDir+filenames[i] 
        let dirPath = ${cacheDir}/${filenames[i]} 
        // 判断是否文件夹 
        let isDirectory 
        try { 
          isDirectory = fs.statSync(dirPath).isDirectory() 
        } 
        catch (e) { 
          console.log(e) 
        } 
        if (isDirectory) { 
          fs.rmdirSync(dirPath) 
        } else { 
          fs.unlink(dirPath).then(() => { 
            console.info(“remove file succeed”); 
          }).catch((err) => { 
            console.info("remove file failed with error message: " + err.message + ", error code: " + err.code); 
          }); 
        } 
      } 
    }) 
  } 
}